CVE-2026-8784: npitre cramfs-tools cramfsck.c change_file_status symlink

Severity: medium (CVSS 4.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-18 · updated 2026-10-25
Weakness: CWE-59

Description

A vulnerability was detected in npitre cramfs-tools up to 2.2. Affected is the function change_file_status of the file cramfsck.c. Performing a manipulation results in symlink following. The attack requires a local approach. The exploit is now public and may be used. The patch is named b4a3a695c9873f824907bd15659f2a6ac7667b4f. It is recommended to apply a patch to fix this issue.

Affected products

npitre cramfs-tools: 2.0, 2.1, 2.2

References

https://github.com/npitre/cramfs-tools/
https://github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7667b4f
https://github.com/npitre/cramfs-tools/issues/13
https://github.com/npitre/cramfs-tools/issues/13#issuecomment-4306102583
https://vuldb.com/submit/811897
https://vuldb.com/vuln/364408
https://vuldb.com/vuln/364408/cti

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