9.8

CVE-2026-68477: linux Improper Input Validation

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-68477DEBIAN-CVE-2026-68477
Published 15-08-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-68477 is a critical (CVSS 9.8) Improper Input Validation vulnerability in linux. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 53% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.71%
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 23 · Related 23
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:4640-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix more places with wrong ipv6 transport offsets Sashiko reports for more incorrect IPv6 transport offsets. The app code for TCP was assuming IPv4 network header even after the ipvsh argument was provided. This can cause problems with apps over IPv6. As for the only official app in the kernel tree (FTP) this problem is harmless because we use Netfilter to mangle the FTP ports and we do not adjust the TCP seq numbers. Also, provide correct offset of the ICMPV6 header in ip_vs_out_icmp_v6() for correct checksum checks when the IPv6 packet has extension headers.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.71%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

0.00 pp

From 0.71% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.71%

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

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-34.34
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1013.13
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < 613ce63711b8d431bba90781f133c39a21684f87 | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < 95d4511d81b2b37e5d2bdde5d912e48243eae517 | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < 3a9dc9b55b53d94613a587604b77d3b20024090c | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < a3f0d5b605cd5da5c95279969fb8cea4e55cee5b | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < 7350eb7ead172ae8024897d4b0f2e15c5318279c | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < d4ec18f48ce78a3bf7c999ac908691007375fe99 | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < 905d7a363ade96a19f214815361e11981142c547 | ≥ 2a3b791e6e1169f374224d164738e9f7be703d77, < b3fe4cbd583895987935a9bdad01c8f9d3a02310 | 2.6.28

3 vendors · 171 products

References

27 links
Show all 27 references