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CVE-2025-38184

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.95, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in 3998283e4c32c0fe69edd59b0876c193f50abce6; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in c2e17984752b9131061d1a2ca1199da2706337fd; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in 8595350615f952fcf8bc861464a6bf6b1129af50; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in 05d332ba075753d569d66333d62d60fff5f57ad8; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in d3dfe821dfe091c0045044343c8d86596d66e2cf; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in 0d3d91c3500f0c480e016faa4e2259c588616e59; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in 0f4a72fb266e48dbe928e1d936eab149e4ac3e1b; From 832629ca5c313e122b22b8e73a6d80f111b1a1ae · fixed in f82727adcf2992822e12198792af450a76ebd5ef

  • Linux Linux

    4.9

  • KernelLinux

    From 4.9.0 · fixed in 5.4.295; From 5.5.0 · fixed in 5.10.239; From 5.11.0 · fixed in 5.15.186; From 5.16.0 · fixed in 6.1.142; From 6.2.0 · fixed in 6.6.95; From 6.7.0 · fixed in 6.12.35; From 6.13.0 · fixed in 6.15.4

References 8

git.kernel.org