CVSS VectorNVD
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
4DescriptionNVD
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.
AnalysisAI
Symlink following in cramfs-tools 2.2 and earlier allows local privileged attackers to manipulate file ownership or timestamps on arbitrary filesystem locations during cramfs extraction. The vulnerability exists in the change_file_status function in cramfsck.c, which performs metadata operations (chown, chmod, utime) without validating that extracted paths are not symbolic links pointing outside the extraction directory. …
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-30728
GHSA-qv27-xjwp-hw6f