cbcvebase.
CVE-2023-52638
published 2024-04-03

CVE-2023-52638: In the Linux kernel, the following vulnerability has been resolved: can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock The following 3 locks…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.18%
8.1th percentile
In the Linux kernel, the following vulnerability has been resolved: can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock The following 3 locks would race against each other, causing the deadlock situation in the Syzbot bug report: - j1939_socks_lock - active_session_list_lock - sk_session_queue_lock A reasonable fix is to change j1939_socks_lock to an rwlock, since in the rare situations where a write lock is required for the linked list that j1939_socks_lock is protecting, the code does not attempt to acquire any more locks. This would break the circular lock dependency, where, for example, the current thread already locks j1939_socks_lock and attempts to acquire sk_session_queue_lock, and at the same time, another thread attempts to acquire j1939_socks_lock while holding sk_session_queue_lock. NOTE: This patch along does not fix the unregister_netdevice bug reported by Syzbot; instead, it solves a deadlock situation to prepare for one or more further patches to actually fix the Syzbot bug, which appears to be a reference counting problem within the j1939 codebase. [mkl: remove unrelated newline change]

Affected

16 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux>= 5b9272e93f2efe3f6cda60cc2c26817b2ce49386 < 03358aba991668d3bb2c65b3c82aa32c3685117003358aba991668d3bb2c65b3c82aa32c36851170
linuxlinux>= 5b9272e93f2efe3f6cda60cc2c26817b2ce49386 < aedda066d717a0b4335d7e0a00b2e3a61e40afcfaedda066d717a0b4335d7e0a00b2e3a61e40afcf
linuxlinux>= 5b9272e93f2efe3f6cda60cc2c26817b2ce49386 < 26dfe112ec2e95fe0099681f6aec33da13c2dd8e26dfe112ec2e95fe0099681f6aec33da13c2dd8e
linuxlinux>= 5b9272e93f2efe3f6cda60cc2c26817b2ce49386 < 559b6322f9480bff68cfa98d108991e945a4f284559b6322f9480bff68cfa98d108991e945a4f284
linuxlinux>= 5b9272e93f2efe3f6cda60cc2c26817b2ce49386 < 6cdedc18ba7b9dacc36466e27e3267d201948c8d6cdedc18ba7b9dacc36466e27e3267d201948c8d
linuxlinux_kernel< 5.15.1495.15.149
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.82-16.1.82-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 5.16 < 6.1.796.1.79
linuxlinux_kernel>= 6.2 < 6.6.186.6.18
linuxlinux_kernel>= 6.7 < 6.7.66.7.6

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.0HIGH
vendor_ubuntu7.0HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.