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CVE-2026-68477

CRITICALCVSS 9.8/10EPSS 0.21%

Last modified

CVE-2026-68477 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.21%

11.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 2a3b791e6e1169f374224d164738e9f7be703d77, < 613ce63711b8d431bba90781f133c39a21684f87; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < 95d4511d81b2b37e5d2bdde5d912e48243eae517; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < 3a9dc9b55b53d94613a587604b77d3b20024090c; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < a3f0d5b605cd5da5c95279969fb8cea4e55cee5b; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < 7350eb7ead172ae8024897d4b0f2e15c5318279c; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < d4ec18f48ce78a3bf7c999ac908691007375fe99; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < 905d7a363ade96a19f214815361e11981142c547; >= 2a3b791e6e1169f374224d164738e9f7be703d77, < b3fe4cbd583895987935a9bdad01c8f9d3a02310
LinuxLinux2.6.28

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68477?
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.
How severe is CVE-2026-68477?
CVE-2026-68477 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-68477?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST