CVE-2026-23139
netfilter: nf_conncount: update last_gc only when GC has been performed
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
3th
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: update last_gc only when GC has been performed Currently last_gc is being updated everytime a new connection is tracked, that means that it is updated even if a GC wasn't performed. With a sufficiently high packet rate, it is possible to always bypass the GC, causing the list to grow infinitely. Update the last_gc value only when a GC has been actually performed.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Feb 14, 2026 |
| Last Updated | Apr 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
f106694733c66a48740c25bc4e212e9b2ea364ce < 2c7c71113ed6d3e2f3aca4c088f22283016ff34f be69850b461e7b491d87a22e33ab76fdd04b725e < c4cde57c8affdcca5bcff53a1047e15d268bdca1 d265929930e2ffafc744c0ae05fb70acd53be1ee < 9f45588993d7f115280fc726119ca86fba32a811 d265929930e2ffafc744c0ae05fb70acd53be1ee < 3cd717359e56f82f06cbf8279b47a7d79880c6f3 d265929930e2ffafc744c0ae05fb70acd53be1ee < 26a82dce2beee39c43c109d9647e16f49cb02a35 d265929930e2ffafc744c0ae05fb70acd53be1ee < 8bdafdf4900040a81422056cabe5e00a37bd101a d265929930e2ffafc744c0ae05fb70acd53be1ee < 7811ba452402d58628e68faedf38745b3d485e3c
Linux / Linux
5.19
References
git.kernel.org: https://git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f git.kernel.org: https://git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1 git.kernel.org: https://git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811 git.kernel.org: https://git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3 git.kernel.org: https://git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35 git.kernel.org: https://git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a git.kernel.org: https://git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c