ghsa-jhfq-cfj3-rm7v
Vulnerability from github
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 , 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": [], "aliases": [ "CVE-2025-38184" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2025-07-04T14:15:25Z", "severity": null }, "details": "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.", "id": "GHSA-jhfq-cfj3-rm7v", "modified": "2025-07-04T15:31:08Z", "published": "2025-07-04T15:31:08Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38184" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef" } ], "schema_version": "1.4.0", "severity": [] }
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