{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-3904", "tracking": { "current_release_date": "2026-03-23T01:52:19.003477Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-3904", "initial_release_date": "2026-03-11T13:38:48.105332Z", "revision_history": [ { "date": "2026-03-11T13:38:48.105332Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| Products created (1).| References created (4).| CWES updated (1)." }, { "date": "2026-03-11T13:38:56.718036Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-11T14:51:29.480529Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (4).| CWES updated (1)." }, { "date": "2026-03-11T14:51:37.453367Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-11T15:38:54.869927Z", "number": "5", "summary": "References created (1)." }, { "date": "2026-03-11T15:54:12.514678Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-11T16:27:08.314019Z", "number": "7", "summary": "CVSS created.| References created (1)." }, { "date": "2026-03-11T16:27:11.288281Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-11T16:39:56.773139Z", "number": "9", "summary": "CVSS created.| Unknown change." }, { "date": "2026-03-11T16:39:59.062988Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-03-11T18:42:59.204558Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Products created (1).| Product Identifiers created (1).| Products connected (1)." }, { "date": "2026-03-12T06:43:08.092035Z", "number": "12", "summary": "Description created for source." }, { "date": "2026-03-12T11:08:30.829522Z", "number": "13", "summary": "Source created.| CVE status created. (valid)| Products created (1).| References created (3)." }, { "date": "2026-03-12T11:08:33.083231Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-03-12T14:56:01.047552Z", "number": "15", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-12T16:05:40.939764Z", "number": "16", "summary": "References created (1)." }, { "date": "2026-03-13T00:28:31.148500Z", "number": "17", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (14).| Product Identifiers created (6).| Product Remediations created (14).| References created (6).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-13T00:28:34.120389Z", "number": "18", "summary": "NCSC Score updated." }, { "date": "2026-03-13T12:20:02.655473Z", "number": "19", "summary": "Source connected.| CVE status created. (valid)| CVSS created.| CWES updated (1)." }, { "date": "2026-03-13T12:20:04.940128Z", "number": "20", "summary": "NCSC Score updated." }, { "date": "2026-03-14T00:21:49.955375Z", "number": "21", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-03-20T09:27:33.538569Z", "number": "22", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:27:36.738708Z", "number": "23", "summary": "NCSC Score updated." } ], "status": "interim", "version": "23" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<=2.36", "product": { "name": "vers:unknown/<=2.36", "product_id": "CSAFPID-5810245" } } ], "category": "product_name", "name": "GNU libc" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/10", "product": { "name": "vers:rpm/10", "product_id": "CSAFPID-2858634", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:10" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/8", "product": { "name": "vers:rpm/8", "product_id": "CSAFPID-1439317", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:8" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/4", "product": { "name": "vers:rpm/4", "product_id": "CSAFPID-1439328", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift:4" } } } ], "category": "product_name", "name": "Red Hat OpenShift Container Platform 4" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441502" } } ], "category": "product_name", "name": "compat-glibc" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441503" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441504" } } ], "category": "product_name", "name": "compat-glibc" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441505" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2898794" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441506" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1441507" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1439329" } } ], "category": "product_name", "name": "rhcos" } ], "category": "product_family", "name": "Red Hat OpenShift Container Platform 4" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/*", "product": { "name": "vers:microsoft/*", "product_id": "CSAFPID-5826718", "product_identification_helper": { "cpe": "cpe:2.3:a:microsoft:cbl2_glibc_2.35-10:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "cbl2 glibc 2.35-10 on CBL Mariner 2.0" } ], "category": "product_family", "name": "Open Source Software" } ], "category": "vendor", "name": "Microsoft" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/2.36-9", "product": { "name": "vers:deb/2.36-9", "product_id": "CSAFPID-5797682", "product_identification_helper": { "purl": "pkg:deb/debian/glibc@2.36-9?distro=bookworm" } } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-1398432" } } ], "category": "product_name", "name": "glibc" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/2.35|<2.37", "product": { "name": "vers:unknown/2.35|<2.37", "product_id": "CSAFPID-5794921" } } ], "category": "product_name", "name": "glibc" } ], "category": "vendor", "name": "The GNU C Library" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-3904", "cwe": { "id": "CWE-366", "name": "Race Condition within a Thread" }, "notes": [ { "category": "description", "text": "Calling NSS-backed functions that support caching via nscd may call the \nnscd client side code and in the GNU C Library version 2.36 under high \nload on x86_64 systems, the client may call memcmp on inputs that are \nconcurrently modified by other processes or threads and crash.\n\n\n\n\nThe nscd client in the GNU C Library uses the memcmp function with \ninputs that may be concurrently modified by another thread, potentially \nresulting in spurious cache misses, which in itself is not a security \nissue.  However in the GNU C Library version 2.36 an optimized \nimplementation of memcmp was introduced for x86_64 which could crash \nwhen invoked with such undefined behaviour, turning this into a \npotential crash of the nscd client and the application that uses it. \nThis implementation was backported to the 2.35 branch, making the nscd \nclient in that branch vulnerable as well.  Subsequently, the fix for \nthis issue was backported to all vulnerable branches in the GNU C \nLibrary repository.\n\n\nIt is advised that distributions that may have cherry-picked the memcpy \nSSE2 optimization in their copy of the GNU C Library, also apply the fix \nto avoid the potential crash in the nscd client.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-3904" }, { "category": "description", "text": "Calling NSS-backed functions that support caching via nscd may call the \nnscd client side code and in the GNU C Library version 2.36 under high \nload on x86_64 systems, the client may call memcmp on inputs that are \nconcurrently modified by other processes or threads and crash.\n\n\n\n\nThe nscd client in the GNU C Library uses the memcmp function with \ninputs that may be concurrently modified by another thread, potentially \nresulting in spurious cache misses, which in itself is not a security \nissue.  However in the GNU C Library version 2.36 an optimized \nimplementation of memcmp was introduced for x86_64 which could crash \nwhen invoked with such undefined behaviour, turning this into a \npotential crash of the nscd client and the application that uses it. \nThis implementation was backported to the 2.35 branch, making the nscd \nclient in that branch vulnerable as well.  Subsequently, the fix for \nthis issue was backported to all vulnerable branches in the GNU C \nLibrary repository.\n\n\nIt is advised that distributions that may have cherry-picked the memcpy \nSSE2 optimization in their copy of the GNU C Library, also apply the fix \nto avoid the potential crash in the nscd client.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-3904" }, { "category": "description", "text": "Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64 systems, the client may call memcmp on inputs that are concurrently modified by other processes or threads and crash. The nscd client in the GNU C Library uses the memcmp function with inputs that may be concurrently modified by another thread, potentially resulting in spurious cache misses, which in itself is not a security issue.  However in the GNU C Library version 2.36 an optimized implementation of memcmp was introduced for x86_64 which could crash when invoked with such undefined behaviour, turning this into a potential crash of the nscd client and the application that uses it. This implementation was backported to the 2.35 branch, making the nscd client in that branch vulnerable as well.  Subsequently, the fix for this issue was backported to all vulnerable branches in the GNU C Library repository. It is advised that distributions that may have cherry-picked the memcpy SSE2 optimization in their copy of the GNU C Library, also apply the fix to avoid the potential crash in the nscd client.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-3904" }, { "category": "description", "text": "A flaw was found in glibc. When calling NSS-backed functions that support caching via nscd, the nscd client under high load on x86_64 systems may call the memcmp function on inputs that are concurrently modified by other processes or threads, causing a crash and resulting in a denial of service.\nThis issue is only exploitable via applications using NSS-backed functions that support caching via nscd under a high load on x86_64 systems. It depends on a race condition on inputs that are concurrently modified by other processes or threads during memory access, increasing the complexity of exploitation. Also, this flaw can only cause an application crash, limiting the security impact to a denial of service. Due to these reasons, this vulnerability has been rated with a moderate severity.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-3904" }, { "category": "other", "text": "0.00014", "title": "EPSS" }, { "category": "other", "text": "4.8", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde, Is related to (a version of) an uncommon product", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is cwe data available from source Nvd", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "first_fixed": [ "CSAFPID-5797682" ], "known_affected": [ "CSAFPID-5794921", "CSAFPID-5826718" ], "known_not_affected": [ "CSAFPID-1398432", "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-1439328", "CSAFPID-1439329", "CSAFPID-1441502", "CSAFPID-1441503", "CSAFPID-1441504", "CSAFPID-1441505", "CSAFPID-1441506", "CSAFPID-1441507", "CSAFPID-2858634", "CSAFPID-2898794" ], "last_affected": [ "CSAFPID-5810245" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-3904" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/3xxx/CVE-2026-3904.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3904" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-3904" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-3904" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0695.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-3904" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-3904" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-3904.json" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0004;hb=HEAD" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=29863" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://sourceware.org/git/?p=glibc.git;a=commit;h=8804157ad9da39631703b92315460808eac86b0c" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://sourceware.org/git/?p=glibc.git;a=commit;h=b712be52645282c706a5faa038242504feb06db5" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "http://www.openwall.com/lists/oss-security/2026/03/11/5" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0695.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0695" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://sourceware.org/git/?p=glibc.git%3Ba%3Dblob%3Bf%3Dadvisories%2FGLIBC-SA-2026-0004%3Bh%3Dfd630dc59194b71bf93c742fed55ae761012efb9%3Bhb%3DHEAD" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://seclists.org/oss-sec/2026/q1/295" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-3904" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3904" } ], "remediations": [ { "category": "mitigation", "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.", "product_ids": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-1439328", "CSAFPID-1439329", "CSAFPID-1441502", "CSAFPID-1441503", "CSAFPID-1441504", "CSAFPID-1441505", "CSAFPID-1441506", "CSAFPID-1441507", "CSAFPID-2858634", "CSAFPID-2898794" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5794921", "CSAFPID-5810245", "CSAFPID-5826718" ] } ], "title": "CVE-2026-3904" } ] }