CVE-2026-31965

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Source

https://cve.org/CVERecord?id=CVE-2026-31965

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31965.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-31965

Aliases

GHSA-mqm2-v645-3qhr

Downstream

DEBIAN-CVE-2026-31965

UBUNTU-CVE-2026-31965

Published

2026-03-18T18:50:37.333Z

Modified

2026-04-10T05:42:53.847778Z

Severity

6.9 (Medium) CVSS_V4 - 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 CVSS Calculator

Summary

HTSlib CRAM reader has out-of-bounds reads due to improper validation of input

Details

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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31965.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-129"
    ]
}

References

Affected packages

Git / github.com/samtools/htslib

Affected ranges

Type

GIT

Repo

https://github.com/samtools/htslib

Events

Introduced

Fixed

4d33bcb31831165a4d0dbf85114ff4085c0baf1f

Last affected

86e74e065e39749d25636f8454773d9d898c5eb3

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.21.1"
        },
        {
            "last_affected": "= 1.23"
        }
    ]
}

Type

GIT

Repo

https://github.com/samtools/htslib

Events

Introduced

36f20e7c1f0bd4d094c4e91836f757caef16475a

Fixed

45034a719156b68705b9bbfba2156bfc2b4c6749

Database specific

{
    "versions": [
        {
            "introduced": "1.22"
        },
        {
            "fixed": "1.22.2"
        }
    ]
}

Affected versions

0.*

0.2.0-rc10

0.2.0-rc11

0.2.0-rc12

0.2.0-rc2

0.2.0-rc3

0.2.0-rc4

0.2.0-rc5

0.2.0-rc6

0.2.0-rc7

0.2.0-rc8

0.2.0-rc9

1.*

1.0

1.1

1.10

1.10.1

1.10.2

1.11

1.11.0

1.12

1.13

1.14

1.15

1.15.1

1.16

1.17

1.18

1.19

1.19.1

1.2

1.2.1

1.20

1.21

1.22

1.22.1

1.23

1.3

1.3.1

1.3.2

1.4

1.4.1

1.5

1.6

1.7

1.8

1.9

Other

stable1

stable2

vcf-direct-final

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31965.json"