CVE-2025-38184 (GCVE-0-2025-38184)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2026-05-11 21:22
VLAI?
Title
tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < 3998283e4c32c0fe69edd59b0876c193f50abce6 (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < c2e17984752b9131061d1a2ca1199da2706337fd (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < 8595350615f952fcf8bc861464a6bf6b1129af50 (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < 05d332ba075753d569d66333d62d60fff5f57ad8 (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < d3dfe821dfe091c0045044343c8d86596d66e2cf (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < 0d3d91c3500f0c480e016faa4e2259c588616e59 (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < 0f4a72fb266e48dbe928e1d936eab149e4ac3e1b (git)
Affected: 832629ca5c313e122b22b8e73a6d80f111b1a1ae , < f82727adcf2992822e12198792af450a76ebd5ef (git)
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Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.95 , ≤ 6.6.* (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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TIPC_NL_UDP_GET_REMOTEIP with media name set to tun\\n\\ntipc: Started in network mode\\ntipc: Node identity 8af312d38a21, cluster identity 4711\\ntipc: Enabled bearer \u003ceth:syz_tun\u003e, priority 1\\nOops: general protection fault\\nKASAN: null-ptr-deref in range\\nCPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT\\nHardware name: QEMU Ubuntu 24.04 PC\\nRIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0\\n\\nthe ub was in fact a struct dev.\\n\\nwhen bid != 0 \u0026\u0026 skip_cnt != 0, bearer_list[bid] may be NULL or\\nother media when other thread changes it.\\n\\nfix this by checking media_id.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tipc: corregir null-ptr-deref al adquirir la IP remota del portador Ethernet Pasos de reproducci\u00f3n: 1. crear una interfaz tun 2. habilitar el portador l2 3. TIPC_NL_UDP_GET_REMOTEIP con el nombre del medio establecido en tun tipc: iniciado en modo de red tipc: identidad del nodo 8af312d38a21, identidad del cl\u00faster 4711 tipc: portador habilitado , prioridad 1 Oops: error de protecci\u00f3n general KASAN: null-ptr-deref en el rango CPU: 1 UID: 1000 PID: 559 Comm: poc No contaminado 6.16.0-rc1+ #117 PREEMPT Nombre del hardware: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 el ub era de hecho un struct dev. cuando bid != 0 y skip_cnt != 0, bearer_list[bid] puede ser NULL u otro medio cuando otro hilo lo cambia. solucione esto comprobando 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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.