CVE-2025-39841

Critical

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a use-after-free window by correcting the buffer release sequence in the deferred receive path. The code freed the RQ buffer first and only then cleared the context pointer under the lock. Concurrent paths (e.g., ABTS and the repost path) also inspect and release the same pointer under the lock, so the old order could lead to double-free/UAF. Note that the repost path already uses the correct pattern: detach the pointer under the lock, then free it after dropping the lock. The deferred path should do the same.

SeverityCritical
CVSS9.8
Exploit probability—
ProductLinux Kernel
PublishedSep 19, 2025
First seenSep 19, 2025

How to fix

Update
  • linux linux_kernel5.4.299, 5.10.243, 5.15.192, 6.1.151, 6.6.105, 6.12.46, 6.16.6 or later

Affected products

ProductAffected versionsFixed in
linux linux_kernel5.1 ≤ v < 5.4.299, 5.5 ≤ v < 5.10.243, 5.11 ≤ v < 5.15.192, 5.16 ≤ v < 6.1.151, 6.2 ≤ v < 6.6.105, 6.7 ≤ v < 6.12.46, 6.13 ≤ v < 6.16.6, 6.175.4.299, 5.10.243, 5.15.192, 6.1.151, 6.6.105, 6.12.46, 6.16.6
debian debian_linux11.0—

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