Read the docs
TI-2023-28976 Aliases CVE-2023-52638GHSA-2595-73wg-wgrp

can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock

Priority LOW 24CWE-667Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 14 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-667 and the CVSS impact.

Summary

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]

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00183 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.149, 6.1.79, 6.6.18 +2Red Hat: 5 advisoriesRed Hat: 14 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.15 and later5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8Patch availableCNA
  • Linux VendorLinux Affected 5.15 and later Fixed in 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 5.15.149; 5.16 to before 6.1.79; 6.2 to before 6.6.18; 6.7 to before 6.7.6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*6.8 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*6.8 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*6.8 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*6.8 rc4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.15.149; 5.16 to before 6.1.79; 6.2 to before 6.6.18; 6.7 to before 6.7.6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* Versions 6.8 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* Versions 6.8 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* Versions 6.8 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* Versions 6.8 rc4 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.149, 6.1.79, 6.6.18, 6.7.6, 6.8

Red Hat 5 advisories

  • RHSA-2026:0576 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.161.1.el9_0, kernel-debug-devel-matched-5.14.0-70.161.1.el9_0, kernel-devel-5.14.0-70.161.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.161.1.el9_0, kernel-5.14.0-70.161.1.el9_0, kernel-abi-stablelists-5.14.0-70.161.1.el9_0 +14
  • RHSA-2026:0537 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +7
  • RHSA-2024:4583 Released 2024-07-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.26.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.26.1.el9_4, kernel-64k-devel-5.14.0-427.26.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.26.1.el9_4, kernel-5.14.0-427.26.1.el9_4, kernel-64k-5.14.0-427.26.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.26.1.el9_4, libperf-5.14.0-427.26.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.26.1.el9_4, kernel-rt-core-5.14.0-427.26.1.el9_4, kernel-rt-debug-5.14.0-427.26.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.26.1.el9_4, kernel-rt-core-5.14.0-427.26.1.el9_4, kernel-rt-debug-5.14.0-427.26.1.el9_4 +9
Show 2 more Red Hat advisories
  • RHSA-2024:4554 Released 2024-07-15 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-5.14.0-284.73.1.rt14.358.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-core-5.14.0-284.73.1.rt14.358.el9_2, kernel-rt-debug-5.14.0-284.73.1.rt14.358.el9_2 +11
  • RHSA-2024:4533 Released 2024-07-15 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.73.1.el9_2
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.73.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.73.1.el9_2, kernel-64k-devel-5.14.0-284.73.1.el9_2 +9
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.73.1.el9_2, kernel-5.14.0-284.73.1.el9_2, kernel-64k-5.14.0-284.73.1.el9_2 +29

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:4533
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:4583
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time EUS (v.9.2)Fixed RHSA-2024:4554
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2)Fixed RHSA-2024:4554
Not affected: 2 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-52638
  2. 2026-10-03 Alias added: GHSA-2595-73wg-wgrp
  3. 2026-11-05 Affected versions changed · Red Hat

References

Patch 5

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences