CVE-2026-74646
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc < 3f265e405e5ef85030c3777262e18bb556bc8724 | affected |
| Linux | Linux | 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc < a902fe1f80f58a2335b6be1131866f827ec44d1a | affected |
| Linux | Linux | 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc < af6345159abcbaa550518f31990d2a9558c2d369 | affected |
| Linux | Linux | 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc < efd02f8d1a7449f15809bc18d3cd41aafea75d7e | affected |
| Linux | Linux | 76e8e4ace1ed2c97dba3b1370e0e105e07c572bc < b85a0e91d7d6cd06a53c881a46f749cfcef416a2 | affected |
| Linux | Linux | 6.2 | affected |
| Linux | Linux | 0 < 6.2 | unaffected |
| Linux | Linux | 6.6.152 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.104 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.45 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.9 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
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/efd02f8d1a7449f15809bc18d3cd41aafea75d7e
- https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2
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