High severity7.8NVD Advisory· Published Sep 19, 2025· Updated May 12, 2026
CVE-2025-39841
CVE-2025-39841
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.
Affected products
1- Linux/Linuxv5Range: 5.1
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlnvdMailing ListThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-032379.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-089022.htmlnvd
News mentions
1- Siemens SIMATICCISA Alerts