Paper/Archive/CVE-2025-39841

CVE-2025-39841

Linux Linux — scsi: lpfc: Fix buffer free/clear order in deferred receive path

Description · from the CVE record

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

ProductAffectedFixed inSource
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < ab34084f42ee06a9028d67c78feafb911d33d111ab34084f42ee06a9028d67c78feafb911d33d111CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < baa39f6ad79d372a6ce0aa639fbb2f1578479f57baa39f6ad79d372a6ce0aa639fbb2f1578479f57CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < 95b63d15fce5c54a73bbf195e1aacb5a75b128e295b63d15fce5c54a73bbf195e1aacb5a75b128e2CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < 55658c7501467ca9ef3bd4453dd920010db8bc1355658c7501467ca9ef3bd4453dd920010db8bc13CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < d96cc9a1b57725930c60b607423759d563b4d900d96cc9a1b57725930c60b607423759d563b4d900CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < 367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < 897f64b01c1249ac730329b83f4f40bab71e86c7897f64b01c1249ac730329b83f4f40bab71e86c7CNA
Linux472e146d1cf3410a898b49834500fa9e33ac41a2 – < 9dba9a45c348e8460da97c450cddf70b2056deb39dba9a45c348e8460da97c450cddf70b2056deb3CNA
Linux5.15.4.299CNA
RUGGEDCOM RST2428P< V3.3V3.3siemens-SADP
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family< V3.3V3.3siemens-SADP
SCALANCE XCH328< V3.3V3.3siemens-SADP

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgit.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111refgit.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57refgit.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2refgit.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13refgit.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900refgit.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11refgit.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7refgit.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3reflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlreflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlrefcert-portal.siemens.com/productcert/html/ssa-089022.htmlrefcert-portal.siemens.com/productcert/html/ssa-032379.html