{"id":"CVE-2022-50536","summary":"bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix repeated calls to sock_put() when msg has more_data\n\nIn tcp_bpf_send_verdict() redirection, the eval variable is assigned to\n__SK_REDIRECT after the apply_bytes data is sent, if msg has more_data,\nsock_put() will be called multiple times.\n\nWe should reset the eval variable to __SK_NONE every time more_data\nstarts.\n\nThis causes:\n\nIPv4: Attempt to release TCP socket in state 1 00000000b4c925d7\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110\nModules linked in:\nCPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1\nHardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __tcp_transmit_skb+0xa1b/0xb90\n ? __alloc_skb+0x8c/0x1a0\n ? __kmalloc_node_track_caller+0x184/0x320\n tcp_write_xmit+0x22a/0x1110\n __tcp_push_pending_frames+0x32/0xf0\n do_tcp_sendpages+0x62d/0x640\n tcp_bpf_push+0xae/0x2c0\n tcp_bpf_sendmsg_redir+0x260/0x410\n ? preempt_count_add+0x70/0xa0\n tcp_bpf_send_verdict+0x386/0x4b0\n tcp_bpf_sendmsg+0x21b/0x3b0\n sock_sendmsg+0x58/0x70\n __sys_sendto+0xfa/0x170\n ? xfd_validate_state+0x1d/0x80\n ? switch_fpu_return+0x59/0xe0\n __x64_sys_sendto+0x24/0x30\n do_syscall_64+0x37/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd","modified":"2026-04-02T08:28:36.041306Z","published":"2025-10-07T15:21:03.056Z","related":["SUSE-SU-2025:4189-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50536.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/113236e8f49f262f318c00ebb14b15f4834e87c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/28e4a763cd4a2b1a78852216ef4bd7df3a05cec6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/578a7628b838a3ac8ad61deaab5a816ff032ac13"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7a9841ca025275b5b0edfb0b618934abb6ceec15"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8786bde11a4f31b63b3036731df0b47337a7a245"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50536.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50536"},{"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":"5f0bfe21c853917aae4bc5a70fe57ddb4054443e"},{"fixed":"7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"15dec6d8f8642a26d6a272af2d7f9877df8f02b8"},{"fixed":"28e4a763cd4a2b1a78852216ef4bd7df3a05cec6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cd9733f5d75c94a32544d6ce5be47e14194cf137"},{"fixed":"8786bde11a4f31b63b3036731df0b47337a7a245"},{"fixed":"578a7628b838a3ac8ad61deaab5a816ff032ac13"},{"fixed":"113236e8f49f262f318c00ebb14b15f4834e87c1"},{"fixed":"7a9841ca025275b5b0edfb0b618934abb6ceec15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"6f226ffe4458ea3b8c33287cb8c86f87dc198dce"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50536.json"}}],"schema_version":"1.7.5"}