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

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2025-11-03 17:35
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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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer\n\nThe reproduction steps:\n1. create a tun interface\n2. enable l2 bearer\n3. 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."
        }
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          "url": "https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef"
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      "title": "tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer",
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    "datePublished": "2025-07-04T13:37:11.226Z",
    "dateReserved": "2025-04-16T04:51:23.992Z",
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    "state": "PUBLISHED"
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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