CVE-2026-23120

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23120
In the Linux kernel, the following vulnerability has been resolved: l2tp: avoid one data-race in l2tp_tunnel_del_work() We should read sk->sk_socket only when dealing with kernel sockets. syzbot reported the following data-race: BUG: KCSAN: data-race in l2tp_tunnel_del_work / sk_common_release write to 0xffff88811c182b20 of 8 bytes by task 5365 on cpu 0: sk_set_socket include/net/sock.h:2092 [inline] sock_orphan include/net/sock.h:2118 [inline] sk_common_release+0xae/0x230 net/core/sock.c:4003 udp_lib_close+0x15/0x20 include/net/udp.h:325 inet_release+0xce/0xf0 net/ipv4/af_inet.c:437 __sock_release net/socket.c:662 [inline] sock_close+0x6b/0x150 net/socket.c:1455 __fput+0x29b/0x650 fs/file_table.c:468 ____fput+0x1c/0x30 fs/file_table.c:496 task_work_run+0x131/0x1a0 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x1fe/0x740 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x1e1/0x2b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88811c182b20 of 8 bytes by task 827 on cpu 1: l2tp_tunnel_del_work+0x2f/0x1a0 net/l2tp/l2tp_core.c:1418 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0xffff88811b818000 -> 0x0000000000000000

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1f63ca44b4f419a1663d94d1bb0b4e2beb73fdb4 Patch
https://git.kernel.org/stable/c/32d417497b79efb403d75f4c185fe6fd9d64b94f Patch
https://git.kernel.org/stable/c/36c40a80109f1771d59558050b1a71e13c60c759 Patch
https://git.kernel.org/stable/c/3d6d414b214ce31659bded2f8df50c93a3769474 Patch
https://git.kernel.org/stable/c/68e92085427c84e7679ddb53c0d68836d220b6e7 Patch
https://git.kernel.org/stable/c/7a29f6bf60f2590fe5e9c4decb451e19afad2bcf Patch
https://git.kernel.org/stable/c/eae074dab764ea181bbed5e88626889319177498 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
History

18 Mar 2026, 13:39

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:4.16:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.16:rc5:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/1f63ca44b4f419a1663d94d1bb0b4e2beb73fdb4 - () https://git.kernel.org/stable/c/1f63ca44b4f419a1663d94d1bb0b4e2beb73fdb4 - Patch
References () https://git.kernel.org/stable/c/32d417497b79efb403d75f4c185fe6fd9d64b94f - () https://git.kernel.org/stable/c/32d417497b79efb403d75f4c185fe6fd9d64b94f - Patch
References () https://git.kernel.org/stable/c/36c40a80109f1771d59558050b1a71e13c60c759 - () https://git.kernel.org/stable/c/36c40a80109f1771d59558050b1a71e13c60c759 - Patch
References () https://git.kernel.org/stable/c/3d6d414b214ce31659bded2f8df50c93a3769474 - () https://git.kernel.org/stable/c/3d6d414b214ce31659bded2f8df50c93a3769474 - Patch
References () https://git.kernel.org/stable/c/68e92085427c84e7679ddb53c0d68836d220b6e7 - () https://git.kernel.org/stable/c/68e92085427c84e7679ddb53c0d68836d220b6e7 - Patch
References () https://git.kernel.org/stable/c/7a29f6bf60f2590fe5e9c4decb451e19afad2bcf - () https://git.kernel.org/stable/c/7a29f6bf60f2590fe5e9c4decb451e19afad2bcf - Patch
References () https://git.kernel.org/stable/c/eae074dab764ea181bbed5e88626889319177498 - () https://git.kernel.org/stable/c/eae074dab764ea181bbed5e88626889319177498 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

18 Feb 2026, 17:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: l2tp: evitar una carrera de datos en l2tp_tunnel_del_work() Deberíamos leer sk->sk_socket solo cuando se trata de sockets del kernel. syzbot informó la siguiente carrera de datos: BUG: KCSAN: carrera de datos en l2tp_tunnel_del_work / sk_common_release escritura en 0xffff88811c182b20 de 8 bytes por la tarea 5365 en la cpu 0: sk_set_socket include/net/sock.h:2092 [inline] sock_orphan include/net/sock.h:2118 [inline] sk_common_release+0xae/0x230 net/core/sock.c:4003 udp_lib_close+0x15/0x20 include/net/udp.h:325 inet_release+0xce/0xf0 net/ipv4/af_inet.c:437 __sock_release net/socket.c:662 [inline] sock_close+0x6b/0x150 net/socket.c:1455 __fput+0x29b/0x650 fs/file_table.c:468 ____fput+0x1c/0x30 fs/file_table.c:496 task_work_run+0x131/0x1a0 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x1fe/0x740 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x1e1/0x2b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f lectura en 0xffff88811c182b20 de 8 bytes por la tarea 827 en la cpu 1: l2tp_tunnel_del_work+0x2f/0x1a0 net/l2tp/l2tp_core.c:1418 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 valor cambiado: 0xffff88811b818000 -> 0x0000000000000000

14 Feb 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-14 15:16

Updated : 2026-03-18 13:39

NVD link : CVE-2026-23120

Mitre link : CVE-2026-23120

CVE.ORG link : CVE-2026-23120

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo