7.5

CVE-2026-45860: linux Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-45860DEBIAN-CVE-2026-45860
Published 27-05-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-45860 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in linux. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 36
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23241-1SUSE-SU-2026:23244-1SUSE-SU-2026:23881-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

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 often and do more effective GCs. This has been tested using a HTTP server and several performance tools while having nft_connlimit/xt_connlimit or OVS limit configured. Output of slowhttptest + OVS limit at 52000 connections: slow HTTP test status on 340th second: initializing: 0 pending: 432 connected: 51998 error: 0 closed: 0 service available: YES

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

+0.02 pp

From 0.68% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.70%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-134.134 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1060.63 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f106694733c66a48740c25bc4e212e9b2ea364ce, < a5c9e14e0e8923218ae881d5e78c990c07694966 | ≥ be69850b461e7b491d87a22e33ab76fdd04b725e, < 13eede458fdf231f1bf96a398feea4ad1553f14c | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < fa85432d58c8e74b39333edbf8d28df2985dfc79 | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < 0792ad077d776c2dcf20f0484e2461ded1b77a24 | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < 3d0994ed0aa1fc0a2c5e620b765e8defdd021bff | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < 6e5fa7add3e76da068a478d905be64be8fa4e80a | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < 0af0812baf2d363176c9b76fc07e33f13aede8db | ≥ d265929930e2ffafc744c0ae05fb70acd53be1ee, < 21d033e472735ecec677f1ae46d6740b5e47a4f3 | ≥ 5.10.248, < 5.10.252 | ≥ 5.15.198, < 5.15.202 | 5.19
  • linux_kernel≥ 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
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.14-1

3 vendors · 148 products

References

37 links
Show all 37 references