{"id":"CVE-2026-23126","summary":"netdevsim: fix a race issue related to the operation on bpf_bound_progs list","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: fix a race issue related to the operation on bpf_bound_progs list\n\nThe netdevsim driver lacks a protection mechanism for operations on the\nbpf_bound_progs list. When the nsim_bpf_create_prog() performs\nlist_add_tail, it is possible that nsim_bpf_destroy_prog() is\nsimultaneously performs list_del. Concurrent operations on the list may\nlead to list corruption and trigger a kernel crash as follows:\n\n[  417.290971] kernel BUG at lib/list_debug.c:62!\n[  417.290983] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n[  417.290992] CPU: 10 PID: 168 Comm: kworker/10:1 Kdump: loaded Not tainted 6.19.0-rc5 #1\n[  417.291003] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  417.291007] Workqueue: events bpf_prog_free_deferred\n[  417.291021] RIP: 0010:__list_del_entry_valid_or_report+0xa7/0xc0\n[  417.291034] Code: a8 ff 0f 0b 48 89 fe 48 89 ca 48 c7 c7 48 a1 eb ae e8 ed fb a8 ff 0f 0b 48 89 fe 48 89 c2 48 c7 c7 80 a1 eb ae e8 d9 fb a8 ff \u003c0f\u003e 0b 48 89 d1 48 c7 c7 d0 a1 eb ae 48 89 f2 48 89 c6 e8 c2 fb a8\n[  417.291040] RSP: 0018:ffffb16a40807df8 EFLAGS: 00010246\n[  417.291046] RAX: 000000000000006d RBX: ffff8e589866f500 RCX: 0000000000000000\n[  417.291051] RDX: 0000000000000000 RSI: ffff8e59f7b23180 RDI: ffff8e59f7b23180\n[  417.291055] RBP: ffffb16a412c9000 R08: 0000000000000000 R09: 0000000000000003\n[  417.291059] R10: ffffb16a40807c80 R11: ffffffffaf9edce8 R12: ffff8e594427ac20\n[  417.291063] R13: ffff8e59f7b44780 R14: ffff8e58800b7a05 R15: 0000000000000000\n[  417.291074] FS:  0000000000000000(0000) GS:ffff8e59f7b00000(0000) knlGS:0000000000000000\n[  417.291079] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  417.291083] CR2: 00007fc4083efe08 CR3: 00000001c3626006 CR4: 0000000000770ee0\n[  417.291088] PKRU: 55555554\n[  417.291091] Call Trace:\n[  417.291096]  \u003cTASK\u003e\n[  417.291103]  nsim_bpf_destroy_prog+0x31/0x80 [netdevsim]\n[  417.291154]  __bpf_prog_offload_destroy+0x2a/0x80\n[  417.291163]  bpf_prog_dev_bound_destroy+0x6f/0xb0\n[  417.291171]  bpf_prog_free_deferred+0x18e/0x1a0\n[  417.291178]  process_one_work+0x18a/0x3a0\n[  417.291188]  worker_thread+0x27b/0x3a0\n[  417.291197]  ? __pfx_worker_thread+0x10/0x10\n[  417.291207]  kthread+0xe5/0x120\n[  417.291214]  ? __pfx_kthread+0x10/0x10\n[  417.291221]  ret_from_fork+0x31/0x50\n[  417.291230]  ? __pfx_kthread+0x10/0x10\n[  417.291236]  ret_from_fork_asm+0x1a/0x30\n[  417.291246]  \u003c/TASK\u003e\n\nAdd a mutex lock, to prevent simultaneous addition and deletion operations\non the list.","modified":"2026-05-18T05:59:43.753260771Z","published":"2026-02-14T15:09:55.552Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23126.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3f560cfc7706029294132482fff5d1bc7884b70d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68462ecc40ea8f780fb3c74ebfddd05506bb731b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b97d5eedf4976cc94321243be83b39efe81a0e15"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d77379ca82efcb2fe563359cc795027d680410db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f1f9cfd2f46a73b7de2982d01be822eac3a0efaa"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23126.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23126"},{"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":"31d3ad832948c75139b0e5b653912f7898a1d5d5"},{"fixed":"3f560cfc7706029294132482fff5d1bc7884b70d"},{"fixed":"f1f9cfd2f46a73b7de2982d01be822eac3a0efaa"},{"fixed":"d77379ca82efcb2fe563359cc795027d680410db"},{"fixed":"68462ecc40ea8f780fb3c74ebfddd05506bb731b"},{"fixed":"b97d5eedf4976cc94321243be83b39efe81a0e15"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23126.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.16.0"},{"fixed":"6.1.162"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.122"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.68"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23126.json"}}],"schema_version":"1.7.5"}