SB20260815145 - NULL pointer dereference in Linux kernel is_vm_area_hugepages()
Published: August 15, 2026
Security Bulletin ID
SB20260815145
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-74327)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in is_vm_area_hugepages() when handling an invalid vmalloc address. A local attacker can provide an invalid vmalloc address to trigger a kernel crash to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/55a44f5259e6a5f1d5b11cb0e19e943c9cc62280
- https://git.kernel.org/stable/c/a1bca6b69bd934e2731d009e645038e05d57ce59
- https://git.kernel.org/stable/c/af71c2b88ccae44418e273bdfe0c96be8515151e
- https://git.kernel.org/stable/c/b86f98e53df4f5d57259817b8e9a00167b78bae6
- https://git.kernel.org/stable/c/bbd664b7c77f6488cd5652231c0fe01d069a73ea
- https://git.kernel.org/stable/c/c55dd3b46c1208d6d2ea737a8aefef4aa4c70cb8
- https://git.kernel.org/stable/c/c741485fa09bf5900f76d95424d86316d0a00331