CVE-2026-31973 is a high-severity NULL pointer dereference vulnerability affecting SAMtools versions 1.17 through 1.23, specifically within the `cram-size` command. Rated CVSS 7.5, this flaw allows an unauthenticated attacker to remotely trigger a program crash (denial of service) with low attack complexity due to a missing error check. There is currently no evidence of active exploitation, no public exploit code, and minimal community discussion or media coverage. Patches are available in SAMtools versions 1.23.1, 1.22.2, and 1.21.1, and there is no known workaround for this issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.17, <= 1.21.1CPE matchmatch criteria | cpe:2.3:a:samtools:samtools:*:*:*:*:*:*:*:* | ||
>= 1.22, < 1.22.2CPE matchmatch criteria | cpe:2.3:a:samtools:samtools:*:*:*:*:*:*:*:* | ||
1.23CPE matchmatch criteria | cpe:2.3:a:samtools:samtools:1.23:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.