{ "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-2026-31965", "tracking": { "current_release_date": "2026-03-20T09:32:05.820824Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-31965", "initial_release_date": "2026-03-18T19:26:09.585950Z", "revision_history": [ { "date": "2026-03-18T19:26:09.585950Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-18T19:26:11.736146Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-18T19:38:53.800850Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (3).| References created (2).| CWES updated (1)." }, { "date": "2026-03-18T19:38:56.286248Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-19T00:27:41.436674Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-19T00:27:43.202175Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-19T00:43:16.921772Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Products connected (2)." }, { "date": "2026-03-19T00:43:27.573543Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-19T06:43:14.547459Z", "number": "9", "summary": "Description created for source." }, { "date": "2026-03-19T21:02:44.244944Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-19T21:02:46.602269Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-20T03:45:24.251554Z", "number": "12", "summary": "CVSS created.| Products connected (3).| Product Identifiers created (3)." }, { "date": "2026-03-20T03:45:28.076047Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-03-20T04:46:49.093218Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (3).| References created (2).| CWES updated (1).| Unknown change." }, { "date": "2026-03-20T04:46:51.423502Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-20T09:32:04.350042Z", "number": "16", "summary": "Source connected.| CVE status created. (valid)| EPSS created." } ], "status": "interim", "version": "16" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.23", "product": { "name": "vers:unknown/1.23", "product_id": "CSAFPID-5859404", "product_identification_helper": { "cpe": "cpe:2.3:a:htslib:htslib:1.23:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/<1.21.1", "product": { "name": "vers:unknown/<1.21.1", "product_id": "CSAFPID-5859402", "product_identification_helper": { "cpe": "cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:*" } } }, { "category": "product_version_range", "name": "vers:unknown/>=1.22|<1.22.2", "product": { "name": "vers:unknown/>=1.22|<1.22.2", "product_id": "CSAFPID-5859403", "product_identification_helper": { "cpe": "cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "HTSlib" } ], "category": "vendor", "name": "HTSlib" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-1396815" } } ], "category": "product_name", "name": "htslib" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-1396816" } } ], "category": "product_name", "name": "htslib" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.23", "product": { "name": "vers:unknown/1.23", "product_id": "CSAFPID-5844846" } }, { "category": "product_version_range", "name": "vers:unknown/<1.21.1", "product": { "name": "vers:unknown/<1.21.1", "product_id": "CSAFPID-5844844" } }, { "category": "product_version_range", "name": "vers:unknown/>=1.22|<1.22.2", "product": { "name": "vers:unknown/>=1.22|<1.22.2", "product_id": "CSAFPID-5844845" } } ], "category": "product_name", "name": "htslib" } ], "category": "vendor", "name": "samtools" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-31965", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-31965" }, { "category": "description", "text": "HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-31965" }, { "category": "description", "text": "A flaw was found in HTSlib, a library for reading and writing bioinformatics file formats. This vulnerability, an out-of-bounds read, occurs in the `cram_decode_slice()` function when processing CRAM (Compressed Reference-oriented Alignment Map) records due to delayed validation of the reference ID field. A remote attacker could exploit this by providing a specially crafted CRAM file, potentially leading to the disclosure of two memory values or causing the program to crash, resulting in a Denial of Service (DoS).\nMODERATE impact: The HTSlib CRAM reader is vulnerable to out-of-bounds reads due to improper input validation. This flaw can lead to information leakage or application crashes when processing specially crafted CRAM files. This affects components utilizing HTSlib for CRAM file processing, such as htslib and python-pysam in Community Projects (EPEL and Fedora).", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-31965" }, { "category": "description", "text": "HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-31965" }, { "category": "description", "text": "HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-31965" }, { "category": "description", "text": "HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, validation of the reference id field occurred too late, allowing two out of bounds reads to occur before the invalid data was detected. The bug does allow two values to be leaked to the caller, however as the function reports an error it may be difficult to exploit them. It is also possible that the program will crash due to trying to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31965.json" }, { "category": "other", "text": "0.00042", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "title": "CVSSV4" }, { "category": "other", "text": "6.9", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.3", "title": "NCSC Score" }, { "category": "other", "text": "Is related to CWE-129 (Improper Validation of Array Index)", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "The value of the most recent CVSS (V3) score, There is cwe data available from source Nvd, Is related to CWE-125 (Out-of-bounds Read)", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-5844844", "CSAFPID-5844845", "CSAFPID-5844846", "CSAFPID-1396815", "CSAFPID-1396816", "CSAFPID-5859402", "CSAFPID-5859403", "CSAFPID-5859404" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31965" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-31965" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-31965" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31965.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-31965" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31965.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-31965" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-31965" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/31xxx/CVE-2026-31965.json" }, { "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://github.com/samtools/htslib/commit/9cefb46453ad471e933b8212d4f45920524d3357" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://github.com/samtools/htslib/security/advisories/GHSA-mqm2-v645-3qhr" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-31965" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31965" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 8.2, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1396815", "CSAFPID-1396816", "CSAFPID-5844844", "CSAFPID-5844845", "CSAFPID-5844846", "CSAFPID-5859402", "CSAFPID-5859403", "CSAFPID-5859404" ] } ], "title": "CVE-2026-31965" } ] }