Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-93256
Published: September 25, 2026
Vulnerability identifier: #VU152139
CSH Severity: Low
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93256
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper exception masking in the arm64 hibernation resume code when resuming from hibernation. A local privileged user can resume a hibernated system while exceptions are unmasked to cause a denial of service.
Pseudo-NMI support can permit pseudo-NMI exceptions during the resume process.
Affected software
Linux kernel
How to mitigate CVE-2026-93256
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/012823494e20c3cce622982ebd3fd6971be39ad2
- https://git.kernel.org/stable/c/099ad3edcef1d955d9f5d6aab16ae78ecdfd4cda
- https://git.kernel.org/stable/c/290c5b0c9fc0c61fb1c41421ed2394f955206ea0
- https://git.kernel.org/stable/c/5370853041a3cb53a125b77528586278f64b378b
- https://git.kernel.org/stable/c/684bde100117931f4c51c644a95f42f2dab041bc
- https://git.kernel.org/stable/c/716c41bd476334afb943308be9ff2142e34461b7
- https://git.kernel.org/stable/c/c9c671e9ab87b639720db8f7f8648bdf0f3bc8ec
- https://git.kernel.org/stable/c/d736ace2c491623c9ab5e73744085e93e9ae3ebe