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Message-ID: <2025050821-CVE-2025-37823-d739@gregkh> Date: Thu, 8 May 2025 08:39:32 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-37823: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too Similarly to the previous patch, we need to safe guard hfsc_dequeue() too. But for this one, we don't have a reliable reproducer. The Linux kernel CVE team has assigned CVE-2025-37823 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.4.293 with commit 68f256305ceb426d545a0dc31f83c2ab1d211a1e Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.237 with commit 2f46d14919c39528c6e540ebc43f90055993eedc Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.181 with commit da7936518996d290e2fcfcaf6cd7e15bfd87804a Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.136 with commit 11bccb054c1462fb069219f8e98e97a5a730758e Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.89 with commit 76c4c22c2437d3d3880efc0f62eca06ef078d290 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.26 with commit c6f035044104c6ff656f4565cd22938dc892528c Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.14.5 with commit c6936266f8bf98a53f28ef9a820e6a501e946d09 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.15-rc4 with commit 6ccbda44e2cc3d26fd22af54c650d6d5d801addf 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-2025-37823 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: net/sched/sch_hfsc.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/68f256305ceb426d545a0dc31f83c2ab1d211a1e https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290 https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09 https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf
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