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Message-ID: <2025091902-CVE-2025-39841-2c0f@gregkh> Date: Fri, 19 Sep 2025 17:28:05 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-39841: scsi: lpfc: Fix buffer free/clear order in deferred receive path From: Greg Kroah-Hartman <gregkh@...nel.org> 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. The Linux kernel CVE team has assigned CVE-2025-39841 to this issue. Affected and fixed versions =========================== Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 5.4.299 with commit ab34084f42ee06a9028d67c78feafb911d33d111 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 5.10.243 with commit baa39f6ad79d372a6ce0aa639fbb2f1578479f57 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 5.15.192 with commit 95b63d15fce5c54a73bbf195e1aacb5a75b128e2 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 6.1.151 with commit 55658c7501467ca9ef3bd4453dd920010db8bc13 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 6.6.105 with commit d96cc9a1b57725930c60b607423759d563b4d900 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 6.12.46 with commit 367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 6.16.6 with commit 897f64b01c1249ac730329b83f4f40bab71e86c7 Issue introduced in 5.1 with commit 472e146d1cf3410a898b49834500fa9e33ac41a2 and fixed in 6.17-rc5 with commit 9dba9a45c348e8460da97c450cddf70b2056deb3 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2025-39841 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/scsi/lpfc/lpfc_nvmet.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111 https://git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57 https://git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2 https://git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13 https://git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900 https://git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11 https://git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7 https://git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3
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