What’s Vulnerable › Vulnerabilities

CVE-2026-74646: misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke

• Severity: high (CVSS 7.8 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: 2026-08-22 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: take fl->lock when moving mmaps on interrupted invoke When an invoke is interrupted by a signal, wait_for_completion_interruptible() returns -ERESTARTSYS and fastrpc_internal_invoke() moves every buffer from fl->mmaps onto cctx->invoke_interrupted_mmaps. This list_del()/list_add_tail() walk runs without holding fl->lock, the lock that serialises fl->mmaps in fastrpc_req_mmap() and fastrpc_req_munmap() everywhere else. Take fl->lock around the move, matching every other fl->mmaps accessor.

Affected products

• Linux kernel: 6.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3f265e405e5ef85030c3777262e18bb556bc8724
• https://git.kernel.org/stable/c/a902fe1f80f58a2335b6be1131866f827ec44d1a
• https://git.kernel.org/stable/c/af6345159abcbaa550518f31990d2a9558c2d369
• https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2
• https://git.kernel.org/stable/c/efd02f8d1a7449f15809bc18d3cd41aafea75d7e

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