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TI-2025-26597 Aliases CVE-2025-39925GHSA-g35j-5v93-p28m

can: j1939: implement NETDEV_UNREGISTER notification handler

Priority LOW 24Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 33 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: can: j1939: implement NETDEV_UNREGISTER notification handler syzbot is reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 problem, for j1939 protocol did not have NETDEV_UNREGISTER notification handler for undoing changes made by j1939_sk_bind(). Commit 25fe97cb7620 ("can: j1939: move j1939_priv_put() into sk_destruct callback") expects that a call to j1939_priv_put() can be unconditionally delayed until j1939_sk_sock_destruct() is called. But we need to call j1939_priv_put() against an extra ref held by j1939_sk_bind() call (as a part of undoing changes made by j1939_sk_bind()) as soon as NETDEV_UNREGISTER notification fires (i.e. before j1939_sk_sock_destruct() is called via j1939_sk_release()). Otherwise, the extra ref on "struct j1939_priv" held by j1939_sk_bind() call prevents "struct net_device" from dropping the usage count to 1; making it impossible for unregister_netdevice() to continue. [mkl: remove space in front of label]

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0015 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.220, 6.1.187, 6.6.156 +3Red Hat: 9 advisoriesRed Hat: 33 fixed, 1 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
LinuxLinux5.4 and later5.15.220, 6.1.187, 6.6.156, 6.12.108, 6.16.8, 6.17Patch availableCNA
  • Linux VendorLinux Affected 5.4 and later Fixed in 5.15.220, 6.1.187, 6.6.156, 6.12.108, 6.16.8, 6.17 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.4 to before 6.16.8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*6.17 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*6.17 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*6.17 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*6.17 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*6.17 rc5VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.4 to before 6.16.8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* Versions 6.17 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* Versions 6.17 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* Versions 6.17 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* Versions 6.17 rc5 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.220, 6.1.187, 6.6.156, 6.12.108, 6.16.8, 6.17

Red Hat 9 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-2026:0535 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.152.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.152.1.el9_2, kernel-64k-devel-5.14.0-284.152.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.152.1.el9_2, kernel-5.14.0-284.152.1.el9_2, kernel-64k-5.14.0-284.152.1.el9_2 +29
  • RHSA-2026:0534 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +11
Show 6 more Red Hat advisories
  • 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-2026:0271 Released 2026-01-08 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.52.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.52.1.el10_0, kernel-64k-devel-6.12.0-55.52.1.el10_0 +8
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.52.1.el10_0, kernel-64k-6.12.0-55.52.1.el10_0, kernel-64k-core-6.12.0-55.52.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.52.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.52.1.el10_0, kernel-rt-64k-6.12.0-55.52.1.el10_0, kernel-rt-64k-core-6.12.0-55.52.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.52.1.el10_0, kernel-rt-core-6.12.0-55.52.1.el10_0, kernel-rt-debug-6.12.0-55.52.1.el10_0 +11
  • RHSA-2026:0173 Released 2026-01-07 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.104.1.el9_4, libperf-5.14.0-427.104.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.104.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.104.1.el9_4, kernel-64k-devel-5.14.0-427.104.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.104.1.el9_4, kernel-5.14.0-427.104.1.el9_4, kernel-64k-5.14.0-427.104.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.104.1.el9_4, kernel-rt-core-5.14.0-427.104.1.el9_4, kernel-rt-debug-5.14.0-427.104.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.104.1.el9_4, kernel-rt-core-5.14.0-427.104.1.el9_4, kernel-rt-debug-5.14.0-427.104.1.el9_4 +11
  • RHSA-2025:23789 Released 2025-12-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.76.1.el9_6, libperf-5.14.0-570.76.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.76.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.76.1.el9_6, kernel-64k-devel-5.14.0-570.76.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.76.1.el9_6, kernel-64k-5.14.0-570.76.1.el9_6, kernel-64k-core-5.14.0-570.76.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.76.1.el9_6, kernel-rt-64k-5.14.0-570.76.1.el9_6, kernel-rt-64k-core-5.14.0-570.76.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.76.1.el9_6, kernel-rt-core-5.14.0-570.76.1.el9_6, kernel-rt-debug-5.14.0-570.76.1.el9_6 +11
  • RHSA-2025:22865 Released 2025-12-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.13.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.13.1.el9_7, kernel-64k-devel-5.14.0-611.13.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.13.1.el9_7, kernel-64k-5.14.0-611.13.1.el9_7, kernel-64k-core-5.14.0-611.13.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.13.1.el9_7, libperf-5.14.0-611.13.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.13.1.el9_7, kernel-rt-64k-5.14.0-611.13.1.el9_7, kernel-rt-64k-core-5.14.0-611.13.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.13.1.el9_7, kernel-rt-core-5.14.0-611.13.1.el9_7, kernel-rt-debug-5.14.0-611.13.1.el9_7 +9
  • RHSA-2025:22854 Released 2025-12-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.20.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.20.1.el10_1, kernel-64k-devel-6.12.0-124.20.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.20.1.el10_1, kernel-64k-6.12.0-124.20.1.el10_1, kernel-64k-core-6.12.0-124.20.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.20.1.el10_1, libperf-6.12.0-124.20.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.20.1.el10_1, kernel-rt-64k-6.12.0-124.20.1.el10_1, kernel-rt-64k-core-6.12.0-124.20.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.20.1.el10_1, kernel-rt-core-6.12.0-124.20.1.el10_1, kernel-rt-debug-6.12.0-124.20.1.el10_1 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:0173
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2025:23789
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:22865
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:0271
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:0173
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2025:23789
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:22865
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:0271
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:0173
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2025:23789
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:22865
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:0271
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:22865
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:0271
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2026:0173
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2025:23789
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:22854
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:22865
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:0271
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2026:0173
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2025:23789
Not affected: 10 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-39925
  2. 2026-10-03 Alias added: GHSA-g35j-5v93-p28m

References

Patch 2

Other 4

  • 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