PT-2026-43671 · Linux · Linux Kernel
CVE-2026-45837
·
Published
2026-05-27
·
Updated
2026-07-28
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the
arena vm close function during a fork operation. The arena vm open() function increments the vml->mmap count but fails to register the child Virtual Memory Area (VMA) in the arena->vma list. Consequently, the vml->vma continues to point to the parent VMA. If the parent performs a munmap, the pointer becomes dangling. A subsequent call to bpf arena free pages() by the child causes zap pages() to read the stale vml->vma, leading to a use-after-free condition.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel