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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38184
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-07-04 14:15:25 UTC
Updated2026-07-30 06:22:58 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae 3998283e4c32c0fe69edd59b0876c193f50abce6 git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae c2e17984752b9131061d1a2ca1199da2706337fd git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae 8595350615f952fcf8bc861464a6bf6b1129af50 git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae 05d332ba075753d569d66333d62d60fff5f57ad8 git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae d3dfe821dfe091c0045044343c8d86596d66e2cf git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae 0d3d91c3500f0c480e016faa4e2259c588616e59 git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae 0f4a72fb266e48dbe928e1d936eab149e4ac3e1b git Not specified
CNA Linux Linux affected 832629ca5c313e122b22b8e73a6d80f111b1a1ae f82727adcf2992822e12198792af450a76ebd5ef git Not specified
CNA Linux Linux affected 4.9 Not specified
CNA Linux Linux unaffected 4.9 semver Not specified
CNA Linux Linux unaffected 5.4.295 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.239 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.186 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.142 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.95 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.35 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.4 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
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