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Review reviewHigh

CVE-2026-45860

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: increase the connection clean up limit to 64 After the optimization to only perform one GC per jiffy, a new problem was introduced. If more than 8 new connections are tracked per jiffy the list won't be cleaned up fast enough possibly reaching the limit wrongly. In order to prevent this issue, only skip the GC if it was already triggered during the same jiffy and the increment is lower than the clean up limit. In addition, increase the clean up limit to 64 connections to avoid triggering GC too ofte...

CVSS
7.5
EPSS
0.69%
49.1% percentile
CISA KEV
Not listed
Published
2026.05.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.69%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: increase the connection clean up limit to 64 After the optimization to only perform one GC per jiffy, a new problem was introduced. If more than 8 new connections are tracked per jiffy the list won't be cleaned up fast enough possibly reaching the limit wrongly. In order to prevent this issue, only skip the GC if it was already triggered during the same jiffy and the increment is lower than the clean up limit. In addition, increase the clean up limit to 64 connections to avoid triggering GC too ofte...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
f106694733c66a48740c25bc4e212e9b2ea364ce, be69850b461e7b491d87a22e33ab76fdd04b725e, d265929930e2ffafc744c0ae05fb70acd53be1ee, 5.10.248, 5.15.198, 5.19, >= 5.10.248 < 5.10.252, >= 5.15.198 < 5.15.202, >= 5.19 < 6.1.165, >= 6.2 < 6.6.128, >= 6.7 < 6.12.75, >= 6.13 < 6.18.14, >= 6.19 < 6.19.4
Fixed versions
5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available
CVE-2026-45860 — Linux Linux, linux kernel | SECUFOCUS NOW