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Message-ID: <2025070414-CVE-2025-38190-5b22@gregkh> Date: Fri, 4 Jul 2025 15:37:19 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-38190: atm: Revert atm_account_tx() if copy_from_iter_full() fails. From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails. In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by atm_account_tx(). It is expected to be reverted by atm_pop_raw() later called by vcc->dev->ops->send(vcc, skb). However, vcc_sendmsg() misses the same revert when copy_from_iter_full() fails, and then we will leak a socket. Let's factorise the revert part as atm_return_tx() and call it in the failure path. Note that the corresponding sk_wmem_alloc operation can be found in alloc_tx() as of the blamed commit. $ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~ The Linux kernel CVE team has assigned CVE-2025-38190 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.4.295 with commit 5e0d00992118e234ebf29d5145c1cc920342777e Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.239 with commit c12430edd92fd49a4800b0f3fb395b50cb16bcc1 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.186 with commit 287b4f085d2ca3375cf1ee672af27410c64777e8 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.142 with commit 2252c539c43f9a1431a7e8b34e3c18e9dd77a96d Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.95 with commit 3902205eadf35db59dbc2186c2a98b9e6182efa5 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.35 with commit 3d828519bd69bfcaabdd942a872679617ef06739 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.15.4 with commit 7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.16-rc3 with commit 7851263998d4269125fd6cb3fdbfc7c6db853859 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-2025-38190 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: include/linux/atmdev.h net/atm/common.c net/atm/raw.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/5e0d00992118e234ebf29d5145c1cc920342777e https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1 https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8 https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5 https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739 https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685 https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859
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