Critical severity9.8NVD Advisory· Published Aug 26, 2026· Updated Aug 27, 2026
CVE-2026-74746
CVE-2026-74746
Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: publish GC-visible tuple last
nf_flow_table_iterate() only treats original-direction tuple nodes as owning entries. Publishing the original node first lets GC observe and free a flow while flow_offload_add() is still inserting the reply node. Publish the reply node first and the original node last so GC never sees a partially installed flow.
KASAN can trigger slab-use-after-free read and write reports in the flowtable/rhashtable path (rht_deferred_worker, jhash, flow_offload_del, flow_offload_lookup, etc.).
Affected products
37- osv-coords36 versionspkg:linux/kernelpkg:rpm/almalinux/bpftoolpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perf
>= 4.16.0, < 5.10.266+ 35 more
- (no CPE)range: >= 4.16.0, < 5.10.266
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.rt7.512.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
- (no CPE)range: < 4.18.0-553.171.1.el8_10
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfanvd
- git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780nvd
- git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4nvd
- git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025nvd
- git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91nvd
- git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7nvd
- git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2nvd
- git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620nvd
News mentions
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