7.8

CVE-2026-68451: linux Classic Buffer Overflow

CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-68451DEBIAN-CVE-2026-68451
Published 13-08-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-68451 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 21
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validate length for CCA ECC private key requests cca_ecc2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject the request early if the token length exceeds the available space in the parameter block.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

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

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.105-1 | < 7.1.8-1
  • linux-6.12< 6.12.107-1~deb12u1
Linux1 product
  • linux≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < 7dc306ff7c4d951582adaae65e0aee9fb4968dbe | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < 447a37a6bef11bfd3645069e380460b11386e2b9 | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < f0831f13c42c1261d449dcee8a035e1c6cd9fcaa | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5 | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < 013a4484f061a2b41f052e25c0015203287e63f1 | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < 8fa3e9435a13c335efb63fb4f4e77531a0031159 | ≥ fa6999e326fe7851ecbd572b8cb9be8e930ebf41, < a9ae0f6dd45c3ccc1d69363f7aea8af179122730 | 5.10

3 vendors · 159 products

References

18 links
Show all 18 references