Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: reject invalid perturb period Gerrard Tai reported that SFQ perturb_period has no range check yet, and this can be used to trigger a race condition fixed in a separate patch. We want to make sure ctl->perturb_period * HZ will not overflow and is positive. tc qd add dev lo root sfq perturb -10 # negative value : error Error: sch_sfq: invalid perturb period. tc qd add dev lo root sfq perturb 1000000000 # too big : error Error: sch_sfq: invalid perturb period. tc qd add dev lo root sfq perturb 2000000 # acceptable value tc -s -d qd sh dev lo qdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before e0936ff56be4e08ad5b60ec26971eae0c40af305
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 2254d038dab9c194fe6a4b1ce31034f42e91a6e5
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 956b5aebb349449b38d920d444ca1392d43719d1
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before b11a50544af691b787384089b68f740ae20a441b
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 0357da9149eac621f39e235a135ebf155f01f7c3
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before f9b97d466e6026ccbdda30bb5b71965b67ccbc82
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 590b2d7d0beadba2aa576708a05a05f0aae39295
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 7ca52541c05c832d32b112274f81a985101f9ba8
2.6.12
Any version before 2.6.12
5.4.297 (semver)
5.10.240 (semver)
5.15.186 (semver)
6.1.142 (semver)
6.6.95 (semver)
6.12.35 (semver)
6.15.4 (semver)
6.16 (original_commit_for_fix)
References
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
lists.debian.org/debian-lts-announce/2025/10/msg00007.html
git.kernel.org/...c/e0936ff56be4e08ad5b60ec26971eae0c40af305
git.kernel.org/...c/2254d038dab9c194fe6a4b1ce31034f42e91a6e5
git.kernel.org/...c/956b5aebb349449b38d920d444ca1392d43719d1
git.kernel.org/...c/b11a50544af691b787384089b68f740ae20a441b
git.kernel.org/...c/0357da9149eac621f39e235a135ebf155f01f7c3
git.kernel.org/...c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
git.kernel.org/...c/590b2d7d0beadba2aa576708a05a05f0aae39295
git.kernel.org/...c/7ca52541c05c832d32b112274f81a985101f9ba8