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CVE-2026-98413

Unknown

Last modified

CVE-2026-98413 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: selinux: always fill AVC decision in avc_has_perm_noaudit() avc_has_perm_noaudit() is documented to return a copy of the access decision in @avd, but its early return for an empty requested permission set leaves the buffer untouched. All callers pass an uninitialized stack variable and afterwards feed it to avc_audit(), and the inode hook even stores it in the per-task decision cache. Fill in a deny-all, audit-all decision, similar to avd_init(), so every caller receives a defined value at no cost on the hot path..

Description

In the Linux kernel, the following vulnerability has been resolved: selinux: always fill AVC decision in avc_has_perm_noaudit() avc_has_perm_noaudit() is documented to return a copy of the access decision in @avd, but its early return for an empty requested permission set leaves the buffer untouched. All callers pass an uninitialized stack variable and afterwards feed it to avc_audit(), and the inode hook even stores it in the per-task decision cache. Fill in a deny-all, audit-all decision, similar to avd_init(), so every caller receives a defined value at no cost on the hot path.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= e6f2f381e4015386a656a369835f949c26000e6b, < c781e737aa0de95289b1774d5fd29388895737a9; >= e6f2f381e4015386a656a369835f949c26000e6b, < e308c5acfe283a66627fc407065626df4ab753ec; >= e6f2f381e4015386a656a369835f949c26000e6b, < f9da796fa238f8e4414ee8481e6c979759a3d563; >= e6f2f381e4015386a656a369835f949c26000e6b, < e77461af13eab5c9a953cc52ec8432cc941d61e2; >= e6f2f381e4015386a656a369835f949c26000e6b, < 5a6f9a872b4ff68877caf998bee352153b7154bc; >= e6f2f381e4015386a656a369835f949c26000e6b, < 24e00850bcff46b984f4c44b92e5499450fcfb5a; >= e6f2f381e4015386a656a369835f949c26000e6b, < 835133337c2ce200db56f62d018c79087dee2603; >= e6f2f381e4015386a656a369835f949c26000e6b, < 8861db305103107199b1426f25fde1fb6d465583
LinuxLinux5.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98413?
In the Linux kernel, the following vulnerability has been resolved: selinux: always fill AVC decision in avc_has_perm_noaudit() avc_has_perm_noaudit() is documented to return a copy of the access decision in @avd, but its early return for an empty requested permission set leaves the buffer untouched. All callers pass an uninitialized stack variable and afterwards feed it to avc_audit(), and the inode hook even stores it in the per-task decision cache. Fill in a deny-all, audit-all decision, similar to avd_init(), so every caller receives a defined value at no cost on the hot path.
How severe is CVE-2026-98413?
Severity scoring for CVE-2026-98413 is pending analysis.
How do I fix CVE-2026-98413?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST