A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/torvalds/linux/commit/9efd23297cca Patch, Third Party Advisory
- https://github.com/torvalds/linux/commit/9efd23297cca Patch, Third Party Advisory
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 2026-10-14 14:17
Affected (CPE criteria) 6
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
References 8
- https://github.com/torvalds/linux/commit/9efd23297cca Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://www.zerodayinitiative.com/advisories/upcoming/ Third Party Advisory, VDB Entry
- https://github.com/torvalds/linux/commit/9efd23297cca Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://www.zerodayinitiative.com/advisories/upcoming/ Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-831302.html