Vulnerability in Npitre Cramfs-Tools
CVE-2026-8784
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Npitre Cramfs-Tools — versions 2.0, 2.1, 2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/364408 (technical-description, vdb-entry)
- vuldb.com/vuln/364408/cti (signature, permissions-required)
- vuldb.com/submit/811897 (third-party-advisory)
- github.com/npitre/cramfs-tools/issues/13 (issue-tracking, exploit)
- github.com/npitre/cramfs-tools/issues/13 (issue-tracking)
- github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7667b4f (patch)
- github.com/npitre/cramfs-tools/ (product)
Frequently asked questions
- What is CVE-2026-8784?
- CVE-2026-8784 is a medium-severity vulnerability in Npitre Cramfs-Tools, classified under Improper Link Resolution Before File Access. CVSS score: 4.2/10. Published 2026-05-18.
- How severe is CVE-2026-8784?
- Medium severity. CVSS v3 base score is 4.2 out of 10.