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CVE-2026-31970

HTSlib is a library for reading and writing bioinformatics file formats. GZI files are used to index block-compressed GZIP [BGZF] files. In the GZI loading function, `bgzf_index_load_hfile()`, it was possible to trigger an integer overflow, leading to an under- or zero-sized buffer being allocated to store the index. Sixteen zero bytes would then be written to this buffer, and, depending on the result of the overflow the rest of the file may also be loaded into the buffer as well. If the func
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:036d9215010d8d8c20e08fb8e69f28dfe6dc49f466b4c3fb2d9274f3d9582e3d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 5 assertions

{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-1284","description":"CWE-1284: Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/4/descriptions/0

{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-131","description":"CWE-131: Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/3/descriptions/0

Affected products and versions

1 source assertion
{"product":"htslib","vendor":"samtools","versions":[{"status":"affected","version":"< 1.21.1"},{"status":"affected","version":">= 1.22, < 1.22.2"},{"status":"affected","version":"= 1.23"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

5 source assertions
{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-1284","description":"CWE-1284: Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/4/descriptions/0
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-131","description":"CWE-131: Incorrect Calculation of Buffer Size","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/problemTypes/3/descriptions/0

Source references

3 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/03/18/9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/adp/1/references/0
{"name":"https://github.com/samtools/htslib/commit/6dd0d7d0e9e7e2e173a28969e624db8bc8bb5828","tags":["x_refsource_MISC"],"url":"https://github.com/samtools/htslib/commit/6dd0d7d0e9e7e2e173a28969e624db8bc8bb5828"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/references/1
{"name":"https://github.com/samtools/htslib/security/advisories/GHSA-p345-84hx-fq6q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/samtools/htslib/security/advisories/GHSA-p345-84hx-fq6q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:130fa9492e0a0439203e21c179910f02aff47a41efc7aedf08ec146cef419c91 · sha256:12050e8ddf1a2d0b… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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