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CVE

CVE-2026-74746

netfilter: flowtable: publish GC-visible tuple last
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CVE

CVE-2026-74746

netfilter: flowtable: publish GC-visible tuple last

In the Linux kernel, the following vulnerability has been resolved:

netfilter: flowtable: publish GC-visible tuple last

nfflowtable_iterate() only treats original-direction tuple nodes as

owning entries. Publishing the original node first lets GC observe and

free a flow while flowoffloadadd() 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 (rhtdeferredworker, jhash, flowoffloaddel,

flowoffloadlookup, etc.).

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/0a00254585827f1695aa2700114af622ea754cfa, https://git.kernel.org/stable/c/2014ac62df9d45bb9a004a043e85df7be09ed780, https://git.kernel.org/stable/c/211ee5d998d92a7d548811939c65942d06c146e4, https://git.kernel.org/stable/c/972fdf7c4f5c282a239c88fea614b056c33dc025, https://git.kernel.org/stable/c/be345dcbddb4643a54252b954af974b16eda8f91, https://git.kernel.org/stable/c/d16b71231e65cb05daea2b45701fcf09cef041e7, https://git.kernel.org/stable/c/d37917e7bebe078f3c17e47fd6fc1c9f6e8497b2, https://git.kernel.org/stable/c/d9d3050a70efe217e73a0751e55fdae6a7092620, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74746.json, https://nvd.nist.gov/vuln/detail/CVE-2026-74746, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00536%
EPSS Percentile
0.43423%
Introduced Version
ac2a66665e231847cab11b8c8e844ce43207dd2e,4.16.0,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0,6.19.0,0
Fix Available
2014ac62df9d45bb9a004a043e85df7be09ed780,5.10.266,5.15.217,6.1.184,6.6.153,6.12.105,6.18.46,7.1.10,0:4.18.0-553.171.1.rt7.512.el8_10,0:4.18.0-553.171.1.el8_10,0:5.14.0-687.55.1.el9_8,6.1.187-1,6.12.107-1~deb12u1,6.12.105-1,6.8.0-1036.39,0:6.12.0-207.111.5.1.el10uek,0:5.15.0-325.220.5.el8uek,0:5.15.0-324.217.5.2.el8uek,0:6.12.0-207.111.5.1.el9uek,0:5.15.0-325.220.5.el9uek,0:5.15.0-324.217.5.2.el9uek,1:6.1.186-228.374.amzn2023,1:1.0-0.amzn2023,1:6.18.48-107.148.amzn2023,0:5.10.268-266.1092.amzn2,0:1.0-0.amzn2,0:5.15.220-153.252.amzn2

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