{"id":"DEBIAN-CVE-2026-23120","details":"In the Linux kernel, the following vulnerability has been resolved:  l2tp: avoid one data-race in l2tp_tunnel_del_work()  We should read sk-\u003esk_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 -\u003e 0x0000000000000000","modified":"2026-09-01T16:06:34.767438541Z","published":"2026-02-14T15:16:07.157Z","upstream":["CVE-2026-23120"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-23120"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.162-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23120.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.69-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23120.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.18.8-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23120.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}