Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally bump set->nelems before insertion In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it already. To address this issue, add the element transaction even if set is full, but toggle the set_full flag to report -ENFILE so the abort path safely unwinds the set to its previous state. As for element updates, decrement set->nelems to restore it. A simpler fix is to call synchronize_rcu() in the error path. However, with a large batch adding elements to already maxed-out set, this could cause noticeable slowdown of such batches.
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
35d0ac9070ef619e3bf44324375878a1c540387b to < 25841e8d4241c6c3763e70ae95050f8108707b46affected35d0ac9070ef619e3bf44324375878a1c540387b to < 022effa9c54903858e443b1225370e6c758d03f6affected35d0ac9070ef619e3bf44324375878a1c540387b to < 25fcaef7948912652905e96922f36583a84fffedaffected35d0ac9070ef619e3bf44324375878a1c540387b to < e3ccb11fc8249759d23326038c8db987ddaabc77affected35d0ac9070ef619e3bf44324375878a1c540387b to < 86bc4b1a0f672d47ac19f9022432cb6a2e01cb33affected35d0ac9070ef619e3bf44324375878a1c540387b to < 6826131c7674329335ca25df2550163eb8a1fd0caffected35d0ac9070ef619e3bf44324375878a1c540387b to < ccb8c8f3c1127cf34d18c737309897c68046bf21affected35d0ac9070ef619e3bf44324375878a1c540387b to < def602e498a4f951da95c95b1b8ce8ae68aa733aaffectedfefdd79403e89b0c673965343b92e2e01e2713a8affected4.9.33 to < 4.10affected
Linux Linux
Default version status: affected
4.10affected0 to < 4.10unaffected5.10.273 to ≤ 5.10.*unaffected5.15.224 to ≤ 5.15.*unaffected6.1.177 to ≤ 6.1.*unaffected6.6.141 to ≤ 6.6.*unaffected6.12.91 to ≤ 6.12.*unaffected6.18.17 to ≤ 6.18.*unaffected6.19.7 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/25841e8d4241c6c3763e70ae95050f8108707b46 ↗
- https://git.kernel.org/stable/c/022effa9c54903858e443b1225370e6c758d03f6 ↗
- https://git.kernel.org/stable/c/25fcaef7948912652905e96922f36583a84fffed ↗
- https://git.kernel.org/stable/c/e3ccb11fc8249759d23326038c8db987ddaabc77 ↗
- https://git.kernel.org/stable/c/86bc4b1a0f672d47ac19f9022432cb6a2e01cb33 ↗
- https://git.kernel.org/stable/c/6826131c7674329335ca25df2550163eb8a1fd0c ↗
- https://git.kernel.org/stable/c/ccb8c8f3c1127cf34d18c737309897c68046bf21 ↗
- https://git.kernel.org/stable/c/def602e498a4f951da95c95b1b8ce8ae68aa733a ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗