CVE-2026-23126

Description

In the Linux kernel, the following vulnerability has been resolved:netdevsim: fix a race issue related to the operation on bpf_bound_progs listThe netdevsim driver lacks a protection mechanism for operations on thebpf_bound_progs list. When the nsim_bpf_create_prog() performslist_add_tail, it is possible that nsim_bpf_destroy_prog() issimultaneously performs list_del. Concurrent operations on the list maylead to list corruption and trigger a kernel crash as follows:[ 417.290971] kernel BUG at lib/list_debug.c:62![ 417.290983] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI[ 417.290992] CPU: 10 PID: 168 Comm: kworker/10:1 Kdump: loaded Not tainted 6.19.0-rc5 #1[ 417.291003] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014[ 417.291007] Workqueue: events bpf_prog_free_deferred[ 417.291021] RIP: 0010:__list_del_entry_valid_or_report+0xa7/0xc0[ 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 <0f> 0b 48 89 d1 48 c7 c7 d0 a1 eb ae 48 89 f2 48 89 c6 e8 c2 fb a8[ 417.291040] RSP: 0018:ffffb16a40807df8 EFLAGS: 00010246[ 417.291046] RAX: 000000000000006d RBX: ffff8e589866f500 RCX: 0000000000000000[ 417.291051] RDX: 0000000000000000 RSI: ffff8e59f7b23180 RDI: ffff8e59f7b23180[ 417.291055] RBP: ffffb16a412c9000 R08: 0000000000000000 R09: 0000000000000003[ 417.291059] R10: ffffb16a40807c80 R11: ffffffffaf9edce8 R12: ffff8e594427ac20[ 417.291063] R13: ffff8e59f7b44780 R14: ffff8e58800b7a05 R15: 0000000000000000[ 417.291074] FS: 0000000000000000(0000) GS:ffff8e59f7b00000(0000) knlGS:0000000000000000[ 417.291079] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033[ 417.291083] CR2: 00007fc4083efe08 CR3: 00000001c3626006 CR4: 0000000000770ee0[ 417.291088] PKRU: 55555554[ 417.291091] Call Trace:[ 417.291096] [ 417.291103] nsim_bpf_destroy_prog+0x31/0x80 [netdevsim][ 417.291154] __bpf_prog_offload_destroy+0x2a/0x80[ 417.291163] bpf_prog_dev_bound_destroy+0x6f/0xb0[ 417.291171] bpf_prog_free_deferred+0x18e/0x1a0[ 417.291178] process_one_work+0x18a/0x3a0[ 417.291188] worker_thread+0x27b/0x3a0[ 417.291197] __pfx_worker_thread+0x10/0x10[ 417.291207] kthread+0xe5/0x120[ 417.291214] __pfx_kthread+0x10/0x10[ 417.291221] ret_from_fork+0x31/0x50[ 417.291230] __pfx_kthread+0x10/0x10[ 417.291236] ret_from_fork_asm+0x1a/0x30[ 417.291246] Add a mutex lock, to prevent simultaneous addition and deletion operationson the list.

Risk Information

Associated Vulnerability

Patch Details

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234