netfilter: nf_conncount: update last_gc only when GC has been performed
Summary
| CVE | CVE-2026-23139 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-14 16:15:53 UTC |
| Updated | 2026-04-03 14:16:24 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: NVD-CWE-noinfo
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f106694733c66a48740c25bc4e212e9b2ea364ce 2c7c71113ed6d3e2f3aca4c088f22283016ff34f git | Not specified |
| CNA | Linux | Linux | affected be69850b461e7b491d87a22e33ab76fdd04b725e c4cde57c8affdcca5bcff53a1047e15d268bdca1 git | Not specified |
| CNA | Linux | Linux | affected d265929930e2ffafc744c0ae05fb70acd53be1ee 9f45588993d7f115280fc726119ca86fba32a811 git | Not specified |
| CNA | Linux | Linux | affected d265929930e2ffafc744c0ae05fb70acd53be1ee 3cd717359e56f82f06cbf8279b47a7d79880c6f3 git | Not specified |
| CNA | Linux | Linux | affected d265929930e2ffafc744c0ae05fb70acd53be1ee 26a82dce2beee39c43c109d9647e16f49cb02a35 git | Not specified |
| CNA | Linux | Linux | affected d265929930e2ffafc744c0ae05fb70acd53be1ee 8bdafdf4900040a81422056cabe5e00a37bd101a git | Not specified |
| CNA | Linux | Linux | affected d265929930e2ffafc744c0ae05fb70acd53be1ee 7811ba452402d58628e68faedf38745b3d485e3c git | Not specified |
| CNA | Linux | Linux | affected 5.19 | Not specified |
| CNA | Linux | Linux | unaffected 5.19 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.161 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.121 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.66 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.6 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/2c7c71113ed6d3e2f3aca4c088f22283016ff34f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/8bdafdf4900040a81422056cabe5e00a37bd101a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/7811ba452402d58628e68faedf38745b3d485e3c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/9f45588993d7f115280fc726119ca86fba32a811 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/26a82dce2beee39c43c109d9647e16f49cb02a35 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/3cd717359e56f82f06cbf8279b47a7d79880c6f3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/c4cde57c8affdcca5bcff53a1047e15d268bdca1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.