{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"de22cba333d8699ad77e79f862fe1320cb1284de","status":"affected","version":"293c53b7dbf9073cbcc488f938bc053ff4caeec0","versionType":"git"},{"lessThan":"10ee118a1756141f8e9c87aa7344ed12b41630a8","status":"affected","version":"1295dae30f30c3daa03005ed8958d44b17f037fd","versionType":"git"},{"lessThan":"583585e48d965338e73e1eb383768d16e0922d73","status":"affected","version":"9974d37ea75f01b47d16072b5dad305bd8d23fcc","versionType":"git"},{"status":"affected","version":"4674c0da448b546e390a981b819cd4af5cb16cf9","versionType":"git"},{"lessThan":"5.19","status":"affected","version":"5.18.18","versionType":"semver"}]},{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"5.15.66","status":"affected","version":"5.15.61","versionType":"semver"},{"lessThan":"5.19.8","status":"affected","version":"5.19.2","versionType":"semver"}]}],"cveId":"CVE-2022-49973","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nskmsg: Fix wrong last sg check in sk_msg_recvmsg()\n\nFix one kernel NULL pointer dereference as below:\n\n[  224.462334] Call Trace:\n[  224.462394]  __tcp_bpf_recvmsg+0xd3/0x380\n[  224.462441]  ? sock_has_perm+0x78/0xa0\n[  224.462463]  tcp_bpf_recvmsg+0x12e/0x220\n[  224.462494]  inet_recvmsg+0x5b/0xd0\n[  224.462534]  __sys_recvfrom+0xc8/0x130\n[  224.462574]  ? syscall_trace_enter+0x1df/0x2e0\n[  224.462606]  ? __do_page_fault+0x2de/0x500\n[  224.462635]  __x64_sys_recvfrom+0x24/0x30\n[  224.462660]  do_syscall_64+0x5d/0x1d0\n[  224.462709]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\nIn commit 9974d37ea75f (\"skmsg: Fix invalid last sg check in\nsk_msg_recvmsg()\"), we change last sg check to sg_is_last(),\nbut in sockmap redirection case (without stream_parser/stream_verdict/\nskb_verdict), we did not mark the end of the scatterlist. Check the\nsk_msg_alloc, sk_msg_page_add, and bpf_msg_push_data functions, they all\ndo not mark the end of sg. They are expected to use sg.end for end\njudgment. So the judgment of '(i != msg_rx->sg.end)' is added back here.","epss":{"date":"2026-11-05","percentile":0.15534,"score":0.00243},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793908812759,"publishedAt":1750244436303,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/de22cba333d8699ad77e79f862fe1320cb1284de"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/10ee118a1756141f8e9c87aa7344ed12b41630a8"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/583585e48d965338e73e1eb383768d16e0922d73"}],"remediation":[],"revision":"3306e08f62c6645107936137515a5d7e94b54f9d3e56b3ae30de22f80fa0c713","sources":[{"modifiedAt":1793908812759,"name":"CNA: Linux","retrievedAt":1793909491413,"url":"https://www.cve.org/CVERecord?id=CVE-2022-49973"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793909520513,"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-49973"}],"ssvc":{"assessedAt":1793908337325,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"skmsg: Fix wrong last sg check in sk_msg_recvmsg()","updatedAt":1793909520513}