Description
In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.
Affected products
linux: linux kernel; debian: debian linux
References9
- git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b Patch
- git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51 Patch
- git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061 Patch
- git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284 Patch
- git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing ListThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-032379.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
Metrics
- CVSS 3.1
-
7.0
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 12 · as of 8 November 2026
- CWE
- CWE-416
Could this be exploited in your environment?
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