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TI-2024-23867 Aliases CVE-2024-36009GHSA-x92x-33cw-2vqw

ax25: Fix netdev refcount issue

Priority LOW 34Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

In the Linux kernel, the following vulnerability has been resolved: ax25: Fix netdev refcount issue The dev_tracker is added to ax25_cb in ax25_bind(). When the ax25 device is detaching, the dev_tracker of ax25_cb should be deallocated in ax25_kill_by_device() instead of the dev_tracker of ax25_dev. The log reported by ref_tracker is shown below: [ 80.884935] ref_tracker: reference already released. [ 80.885150] ref_tracker: allocated in: [ 80.885349] ax25_dev_device_up+0x105/0x540 [ 80.885730] ax25_device_event+0xa4/0x420 [ 80.885730] notifier_call_chain+0xc9/0x1e0 [ 80.885730] __dev_notify_flags+0x138/0x280 [ 80.885730] dev_change_flags+0xd7/0x180 [ 80.885730] dev_ifsioc+0x6a9/0xa30 [ 80.885730] dev_ioctl+0x4d8/0xd90 [ 80.885730] sock_do_ioctl+0x1c2/0x2d0 [ 80.885730] sock_ioctl+0x38b/0x4f0 [ 80.885730] __se_sys_ioctl+0xad/0xf0 [ 80.885730] do_syscall_64+0xc4/0x1b0 [ 80.885730] entry_SYSCALL_64_after_hwframe+0x67/0x6f [ 80.885730] ref_tracker: freed in: [ 80.885730] ax25_device_event+0x272/0x420 [ 80.885730] notifier_call_chain+0xc9/0x1e0 [ 80.885730] dev_close_many+0x272/0x370 [ 80.885730] unregister_netdevice_many_notify+0x3b5/0x1180 [ 80.885730] unregister_netdev+0xcf/0x120 [ 80.885730] sixpack_close+0x11f/0x1b0 [ 80.885730] tty_ldisc_kill+0xcb/0x190 [ 80.885730] tty_ldisc_hangup+0x338/0x3d0 [ 80.885730] __tty_hangup+0x504/0x740 [ 80.885730] tty_release+0x46e/0xd80 [ 80.885730] __fput+0x37f/0x770 [ 80.885730] __x64_sys_close+0x7b/0xb0 [ 80.885730] do_syscall_64+0xc4/0x1b0 [ 80.885730] entry_SYSCALL_64_after_hwframe+0x67/0x6f [ 80.893739] ------------[ cut here ]------------ [ 80.894030] WARNING: CPU: 2 PID: 140 at lib/ref_tracker.c:255 ref_tracker_free+0x47b/0x6b0 [ 80.894297] Modules linked in: [ 80.894929] CPU: 2 PID: 140 Comm: ax25_conn_rel_6 Not tainted 6.9.0-rc4-g8cd26fd90c1a #11 [ 80.895190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qem4 [ 80.895514] RIP: 0010:ref_tracker_free+0x47b/0x6b0 [ 80.895808] Code: 83 c5 18 4c 89 eb 48 c1 eb 03 8a 04 13 84 c0 0f 85 df 01 00 00 41 83 7d 00 00 75 4b 4c 89 ff 9 [ 80.896171] RSP: 0018:ffff888009edf8c0 EFLAGS: 00000286 [ 80.896339] RAX: 1ffff1100141ac00 RBX: 1ffff1100149463b RCX: dffffc0000000000 [ 80.896502] RDX: 0000000000000001 RSI: 0000000000000246 RDI: ffff88800a0d6518 [ 80.896925] RBP: ffff888009edf9b0 R08: ffff88806d3288d3 R09: 1ffff1100da6511a [ 80.897212] R10: dffffc0000000000 R11: ffffed100da6511b R12: ffff88800a4a31d4 [ 80.897859] R13: ffff88800a4a31d8 R14: dffffc0000000000 R15: ffff88800a0d6518 [ 80.898279] FS: 00007fd88b7fe700(0000) GS:ffff88806d300000(0000) knlGS:0000000000000000 [ 80.899436] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.900181] CR2: 00007fd88c001d48 CR3: 000000000993e000 CR4: 00000000000006f0 ... [ 80.935774] ref_tracker: sp%d@000000000bb9df3d has 1/1 users at [ 80.935774] ax25_bind+0x424/0x4e0 [ 80.935774] __sys_bind+0x1d9/0x270 [ 80.935774] __x64_sys_bind+0x75/0x80 [ 80.935774] do_syscall_64+0xc4/0x1b0 [ 80.935774] entry_SYSCALL_64_after_hwframe+0x67/0x6f Change ax25_dev->dev_tracker to the dev_tracker of ax25_cb in order to mitigate the bug.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00235 14th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.15, 4.20, 5.5 +6

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
LinuxLinux4.14.277 to before 4.15; 4.19.240 to before 4.20; 5.4.190 to before 5.5; 5.10.112 to before 5.11; 5.15.35 to before 5.164.15, 4.20, 5.5, 5.11, 5.16Patch availableCNA
LinuxLinux5.17 and later6.1.90, 6.6.30, 6.8.9, 6.9Patch availableCNA
  • Linux VendorLinux Affected 4.14.277 to before 4.15; 4.19.240 to before 4.20; 5.4.190 to before 5.5; 5.10.112 to before 5.11; 5.15.35 to before 5.16 Fixed in 4.15, 4.20, 5.5, 5.11, 5.16 Patch available CNA
  • Linux VendorLinux Affected 5.17 and later Fixed in 6.1.90, 6.6.30, 6.8.9, 6.9 Patch available CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14.277 to before 4.15; 4.19.240 to before 4.20; 5.4.190 to before 5.5; 5.10.112 to before 5.11; 5.15.35 to before 5.16; 5.17.1 to before 6.1.90; 6.2 to before 6.6.30; 6.7 to before 6.8.9VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:*5.17VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:rc4:*:*:*:*:*:*5.17 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:rc5:*:*:*:*:*:*5.17 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:rc6:*:*:*:*:*:*5.17 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:rc7:*:*:*:*:*:*5.17 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.17:rc8:*:*:*:*:*:*5.17 rc8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*6.9 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*6.9 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*6.9 rc3VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14.277 to before 4.15; 4.19.240 to before 4.20; 5.4.190 to before 5.5; 5.10.112 to before 5.11; 5.15.35 to before 5.16; 5.17.1 to before 6.1.90; 6.2 to before 6.6.30; 6.7 to before 6.8.9 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:* Versions 5.17 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:rc4:*:*:*:*:*:* Versions 5.17 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:rc5:*:*:*:*:*:* Versions 5.17 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:rc6:*:*:*:*:*:* Versions 5.17 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:rc7:*:*:*:*:*:* Versions 5.17 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.17:rc8:*:*:*:*:*:* Versions 5.17 rc8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* Versions 6.9 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* Versions 6.9 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:* Versions 6.9 rc3 Vulnerable ·Linux
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*6.9 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*6.9 rc5VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:* Versions 6.9 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:* Versions 6.9 rc5 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.15, 4.20, 5.5, 5.11, 5.16
  • Fix · CNA Linux (Linux) Fixed in 6.1.90, 6.6.30, 6.8.9, 6.9

Vendor assessments

Red Hat

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

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-36009
  2. 2026-10-03 Alias added: GHSA-x92x-33cw-2vqw

References

Patch 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