5.5

CVE-2025-38184

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.9 < 5.4.295
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.239
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.186
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.142
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.95
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.35
Linux ≫ Linux Kernel Version >= 6.13 < 6.15.4
Linux ≫ Linux Kernel Version6.16 Updaterc1
Linux ≫ Linux Kernel Version6.16 Updaterc2
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.055
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/3998283e4c32c0fe69edd59b0876c193f50abce6
Patch
https://git.kernel.org/stable/c/c2e17984752b9131061d1a2ca1199da2706337fd
Patch
https://git.kernel.org/stable/c/8595350615f952fcf8bc861464a6bf6b1129af50
Patch
https://git.kernel.org/stable/c/05d332ba075753d569d66333d62d60fff5f57ad8
Patch
https://git.kernel.org/stable/c/d3dfe821dfe091c0045044343c8d86596d66e2cf
Patch
https://git.kernel.org/stable/c/0d3d91c3500f0c480e016faa4e2259c588616e59
Patch
https://git.kernel.org/stable/c/0f4a72fb266e48dbe928e1d936eab149e4ac3e1b
Patch
https://git.kernel.org/stable/c/f82727adcf2992822e12198792af450a76ebd5ef
Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory