7.5

CVE-2026-46027: linux Reachable Assertion

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-46027DEBIAN-CVE-2026-46027
Published 27-05-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-46027 is a high (CVSS 7.5) Reachable Assertion vulnerability in linux. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.1% 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
0.72%
0%100%
Low · +0.21 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 47 · Related 47
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

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: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.72%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.21 pp

From 0.50% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.72%

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

Ubuntu158 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 22546729b96fc873b23065dc49e3d73c45cfb874 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 5eedbfd82c2884e0010fdfb3c9446a6ebcadb691 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < f0858e1d5624bb120b198f2a8528f97a9b0ae069 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 6180a296ca65b08a81914805cbc0f78da5f10a1f | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < ea0b5d0fe96356dce38f98375a57c52a04e13712 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 83bcf9228b0501694fb2589ed1d142855a2887f2 | ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 5a8db80f721deee8e916c2cfdee78decda02ce4f | 4.11
  • linux_kernel≥ 4.11, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 161 products

References

46 links
Show all 46 references