CVE-2026-23139
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f106694733c66a48740c25bc4e212e9b2ea364ce < 2c7c71113ed6d3e2f3aca4c088f22283016ff34f | affected |
| Linux | Linux | be69850b461e7b491d87a22e33ab76fdd04b725e < c4cde57c8affdcca5bcff53a1047e15d268bdca1 | affected |
| Linux | Linux | d265929930e2ffafc744c0ae05fb70acd53be1ee < 9f45588993d7f115280fc726119ca86fba32a811 | affected |
| Linux | Linux | d265929930e2ffafc744c0ae05fb70acd53be1ee < 3cd717359e56f82f06cbf8279b47a7d79880c6f3 | affected |
| Linux | Linux | d265929930e2ffafc744c0ae05fb70acd53be1ee < 26a82dce2beee39c43c109d9647e16f49cb02a35 | affected |
| Linux | Linux | d265929930e2ffafc744c0ae05fb70acd53be1ee < 8bdafdf4900040a81422056cabe5e00a37bd101a | affected |
| Linux | Linux | d265929930e2ffafc744c0ae05fb70acd53be1ee < 7811ba452402d58628e68faedf38745b3d485e3c | affected |
| Linux | Linux | 5.19 | affected |
| Linux | Linux | 0 < 5.19 | unaffected |
| Linux | Linux | 6.1.161 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.121 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.66 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.6 <= 6.18.* | unaffected |
| Linux | Linux | 6.19 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f
- https://git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1
- https://git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811
- https://git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3
- https://git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35
- https://git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a
- https://git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c
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