SB20260529184 - Improper input validation in Linux kernel isofs
Published: May 29, 2026
Security Bulletin ID
SB20260529184
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-46124)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper input validation in isofs_export_iget when processing block numbers from NFS file handles. A remote user can send a crafted NFS file handle to disclose sensitive information.
Exploitation requires an authenticated NFS peer and affects isofs exported over NFS from loop-mounted images.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0a1af74ae2177bda3aee0837a0546309aa539d0d
- https://git.kernel.org/stable/c/24376458138387fb251e782e624c7776e9826796
- https://git.kernel.org/stable/c/4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6
- https://git.kernel.org/stable/c/afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b
- https://git.kernel.org/stable/c/bb0988ed4f2e26d59bbb58f644cb3a55b7521e21