CVE-2025-38184

tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer

MEDIUM

5.5

CVSS Score

Published: July 4, 2025 at 01:37 PM UTC

Updated: October 15, 2026 at 10:18 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer The reproduction steps: 1. create a tun interface 2. enable l2 bearer 3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun tipc: Started in network mode tipc: Node identity 8af312d38a21, cluster identity 4711 tipc: Enabled bearer <eth:syz_tun>, priority 1 Oops: general protection fault KASAN: null-ptr-deref in range CPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT Hardware name: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 the ub was in fact a struct dev. when bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL or other media when other thread changes it. fix this by checking media_id.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

4.9 ≤ v < 5.4.2955.11 ≤ v < 5.15.1865.16 ≤ v < 6.1.1425.5 ≤ v < 5.10.2396.13 ≤ v < 6.15.46.2 ≤ v < 6.6.956.7 ≤ v < 6.12.356.16 6.16 rc1 6.16 rc2832629ca5c313e122b22b8e73a6d80f111b1a1ae

Vendor states this is fixed in 05d332ba075753d569d66333d62d60fff5f57ad8 (fixed)

Vendor states this is fixed in 0d3d91c3500f0c480e016faa4e2259c588616e59 (fixed)

Vendor states this is fixed in 0f4a72fb266e48dbe928e1d936eab149e4ac3e1b (fixed)

Vendor states this is fixed in 3998283e4c32c0fe69edd59b0876c193f50abce6 (fixed)

Vendor states this is fixed in 8595350615f952fcf8bc861464a6bf6b1129af50 (fixed)

Vendor states this is fixed in c2e17984752b9131061d1a2ca1199da2706337fd (fixed)

Vendor states this is fixed in d3dfe821dfe091c0045044343c8d86596d66e2cf (fixed)

Vendor states this is fixed in f82727adcf2992822e12198792af450a76ebd5ef (fixed)

Vendor states this is fixed in 4.9 (unaffected)

Vendor states this is fixed in 5.10.239 (unaffected)

Vendor states this is fixed in 5.15.186 (unaffected)

Vendor states this is fixed in 5.4.295 (unaffected)