Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarchies can lead to excessive recursion in qdisc tree walkers and exhaust the kernel stack. The existing loop check does not cover the create-and-graft path, so a hierarchy can still be extended by creating a new child qdisc below an already deep parent. Store the hierarchy depth in struct Qdisc and update it when qdiscs are grafted. Reject new child qdiscs once the parent is already at the maximum allowed depth.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 08dc49df1527b09d9ea225a7265bbf6c237097bfaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < a627d36c2a94e18c8c105ae68008786dfd85592eaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9f69bb9fdaa2fe64b68bb62fb84d405784bee540affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8ca8cdb74939581339e1ae370193c0adb5a85336affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2759acf08a3454866660edcd3ef4e64139f254a6affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < a4b14a4df29d36458a943f9b521ddd0f940363ccaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e2d658c6427844cee5bc654b436ca68d680b6148affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < dedd34b0f2310e28c5f6d4875cfbf4b7ed821c01affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.267 to ≤ 5.10.*unaffected5.15.218 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.152 to ≤ 6.6.*unaffected6.12.104 to ≤ 6.12.*unaffected6.18.45 to ≤ 6.18.*unaffected7.1.9 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/08dc49df1527b09d9ea225a7265bbf6c237097bf ↗
- https://git.kernel.org/stable/c/a627d36c2a94e18c8c105ae68008786dfd85592e ↗
- https://git.kernel.org/stable/c/9f69bb9fdaa2fe64b68bb62fb84d405784bee540 ↗
- https://git.kernel.org/stable/c/8ca8cdb74939581339e1ae370193c0adb5a85336 ↗
- https://git.kernel.org/stable/c/2759acf08a3454866660edcd3ef4e64139f254a6 ↗
- https://git.kernel.org/stable/c/a4b14a4df29d36458a943f9b521ddd0f940363cc ↗
- https://git.kernel.org/stable/c/e2d658c6427844cee5bc654b436ca68d680b6148 ↗
- https://git.kernel.org/stable/c/dedd34b0f2310e28c5f6d4875cfbf4b7ed821c01 ↗