{"id":"CVE-2025-38465","title":"netlink: Fix wraparounds of sk->sk_rmem_alloc.","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: Fix wraparounds of sk->sk_rmem_alloc.\n\nNetlink has this pattern in some places\n\n  if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)\n  \tatomic_add(skb->trues…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9da025150b7c14a8390fc06aea314c0a4011e82c","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd69af06101090eaa60b3d216ae715f9c0a58e5b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 76602d8e13864524382b0687dc32cd8f19164d5a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 55baecb9eb90238f60a8350660d6762046ebd3bd","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4b8e18af7bea92f8b7fb92d40aeae729209db250","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cd7ff61bfffd7000143c42bbffb85eeb792466d6","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc","Linux 2.6.12"],"published":"2025-07-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:07:19.018Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38465","references":[{"url":"https://git.kernel.org/stable/c/9da025150b7c14a8390fc06aea314c0a4011e82c"},{"url":"https://git.kernel.org/stable/c/c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98"},{"url":"https://git.kernel.org/stable/c/fd69af06101090eaa60b3d216ae715f9c0a58e5b"},{"url":"https://git.kernel.org/stable/c/76602d8e13864524382b0687dc32cd8f19164d5a"},{"url":"https://git.kernel.org/stable/c/55baecb9eb90238f60a8350660d6762046ebd3bd"},{"url":"https://git.kernel.org/stable/c/4b8e18af7bea92f8b7fb92d40aeae729209db250"},{"url":"https://git.kernel.org/stable/c/cd7ff61bfffd7000143c42bbffb85eeb792466d6"},{"url":"https://git.kernel.org/stable/c/ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc"}],"tags":["cve.org"],"epss":0.002,"epssPercentile":0.09819,"ingestedAt":"2026-10-15T05:52:46.087Z","slug":"CVE-2025-38465","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: Fix wraparounds of sk->sk_rmem_alloc.\n\nNetlink has this pattern in some places\n\n  if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf)\n  \tatomic_add(skb->truesize, &sk->sk_rmem_alloc);\n\n, which has the same problem fixed by commit 5a465a0da13e (\"udp:\nFix multiple wraparounds of sk->sk_rmem_alloc.\").\n\nFor example, if we set INT_MAX to SO_RCVBUFFORCE, the condition\nis always false as the two operands are of int.\n\nThen, a single socket can eat as many skb as possible until OOM\nhappens, and we can see multiple wraparounds of sk->sk_rmem_alloc.\n\nLet's fix it by using atomic_add_return() and comparing the two\nvariables as unsigned int.\n\nBefore:\n  [root@fedora ~]# ss -f netlink\n  Recv-Q      Send-Q Local Address:Port                Peer Address:Port\n  -1668710080 0               rtnl:nl_wraparound/293               *\n\nAfter:\n  [root@fedora ~]# ss -f netlink\n  Recv-Q     Send-Q Local Address:Port                Peer Address:Port\n  2147483072 0               rtnl:nl_wraparound/290               *\n  ^\n  `--- INT_MAX - 576\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9da025150b7c14a8390fc06aea314c0a4011e82c`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd69af06101090eaa60b3d216ae715f9c0a58e5b`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 76602d8e13864524382b0687dc32cd8f19164d5a`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 55baecb9eb90238f60a8350660d6762046ebd3bd`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4b8e18af7bea92f8b7fb92d40aeae729209db250`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cd7ff61bfffd7000143c42bbffb85eeb792466d6`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}