CVE-2026-74646

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-22 16:16

Updated : 2026-08-25 06:18

NVD link : CVE-2026-74646

Mitre link : CVE-2026-74646

CVE.ORG link : CVE-2026-74646

JSON object : View

Products Affected

No product.

CWE

No CWE.

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