{"id":"CVE-2022-49973","summary":"skmsg: Fix wrong last sg check in sk_msg_recvmsg()","details":"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-\u003esg.end)' is added back here.","modified":"2026-04-11T12:44:46.113228Z","published":"2025-06-18T11:00:36.303Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49973.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10ee118a1756141f8e9c87aa7344ed12b41630a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/583585e48d965338e73e1eb383768d16e0922d73"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de22cba333d8699ad77e79f862fe1320cb1284de"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49973.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49973"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"293c53b7dbf9073cbcc488f938bc053ff4caeec0"},{"fixed":"de22cba333d8699ad77e79f862fe1320cb1284de"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1295dae30f30c3daa03005ed8958d44b17f037fd"},{"fixed":"10ee118a1756141f8e9c87aa7344ed12b41630a8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9974d37ea75f01b47d16072b5dad305bd8d23fcc"},{"fixed":"583585e48d965338e73e1eb383768d16e0922d73"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4674c0da448b546e390a981b819cd4af5cb16cf9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49973.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.61"},{"fixed":"5.15.66"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.19.2"},{"fixed":"5.19.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49973.json"}}],"schema_version":"1.7.5"}