What’s Vulnerable › Vulnerabilities

CVE-2024-42075: bpf: Fix remap of arena.

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-29 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix remap of arena. The bpf arena logic didn't account for mremap operation. Add a refcnt for multiple mmap events to prevent use-after-free in arena_vm_close.

Affected products

• Linux kernel: before 6.9; from 6.9.1 before 6.9.8 — fixed in 6.9, 6.9.8

How to fix

Upgrade to a fixed version: Linux kernel 6.9, 6.9.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/87496a1b01e8e2e399428c0db25e106f7961d01e
• https://git.kernel.org/stable/c/b90d77e5fd784ada62ddd714d15ee2400c28e1cf
• https://git.kernel.org/stable/c/87496a1b01e8e2e399428c0db25e106f7961d01e
• https://git.kernel.org/stable/c/b90d77e5fd784ada62ddd714d15ee2400c28e1cf

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