CVE-2025-40302: media: videobuf2: forbid remove_bufs when legacy fileio is active

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-08 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: media: videobuf2: forbid remove_bufs when legacy fileio is active vb2_ioctl_remove_bufs() call manipulates queue internal buffer list, potentially overwriting some pointers used by the legacy fileio access mode. Forbid that ioctl when fileio is active to protect internal queue state between subsequent read/write calls.

Affected products

Linux kernel: 6.10 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/27afd6e066cfd80ddbe22a4a11b99174ac89cced
https://git.kernel.org/stable/c/a6a493b985bfffac097a4e1be09f98b27729dca8
https://git.kernel.org/stable/c/e819b34df0a7030a15c968d619fa8a3ed2455c7a

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