In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix potential null-ptr-deref in to_atmarpd(). atmarpd is protected by RTNL since commit f3a0592b37b8 ("[ATM]: clip causes unregister hang"). However, it is not enough because to_atmarpd() is called without RTNL, especially clip_neigh_solicit() / neigh_ops->solicit() is unsleepable. Also, there is no RTNL dependency around atmarpd. Let's use a private mutex and RCU to protect access to atmarpd in to_atmarpd().
Fix
Patch, vendor advisory and mitigation references on NVD 8
- https://git.kernel.org/stable/c/06935c50cfa3ac57cce80bba67b6d38ec1406e92 Patch
- https://git.kernel.org/stable/c/3251ce3979f41bd228f77a7615f9dd616d06a110 Patch
- https://git.kernel.org/stable/c/36caab990b69ef4eec1d81c52a19f080b7daa059 Patch
- https://git.kernel.org/stable/c/706cc36477139c1616a9b2b96610a8bb520b7119 Patch
- https://git.kernel.org/stable/c/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9 Patch
- https://git.kernel.org/stable/c/a4c5785feb979cd996a99cfaad8bf353b2e79301 Patch
- https://git.kernel.org/stable/c/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57 Patch
- https://git.kernel.org/stable/c/f58e4270c73e7f086322978d585ea67c8076ce49 Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linux, debianNVD modified 2026-10-15 22:18
Affected (CPE criteria) 12
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
References 10
- https://git.kernel.org/stable/c/06935c50cfa3ac57cce80bba67b6d38ec1406e92 Patch
- https://git.kernel.org/stable/c/3251ce3979f41bd228f77a7615f9dd616d06a110 Patch
- https://git.kernel.org/stable/c/36caab990b69ef4eec1d81c52a19f080b7daa059 Patch
- https://git.kernel.org/stable/c/706cc36477139c1616a9b2b96610a8bb520b7119 Patch
- https://git.kernel.org/stable/c/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9 Patch
- https://git.kernel.org/stable/c/a4c5785feb979cd996a99cfaad8bf353b2e79301 Patch
- https://git.kernel.org/stable/c/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57 Patch
- https://git.kernel.org/stable/c/f58e4270c73e7f086322978d585ea67c8076ce49 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