What is CVE-2026-80901?

CVE-2026-80901 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 2.6.28 onward and patched in 6.1.183, 6.6.151, 6.12.103 and others. CVE-2026-80901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-80901?

CVE-2026-80901 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-80901?

Yes, CVE-2026-80901 has been patched. Fixed versions include 6.1.183, 6.6.151, 6.12.103 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-80901 actively exploited?

CVE-2026-80901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-80901

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix the checksum validations ip_vs_in_icmp_v6() is missing checksum validation for ICMPv6 packets from clients. In fact, as for TCP/UDP we should validate the checksum for ICMP packets only when we mangle the packets on MASQ or on reply for tunnel. Also, Sashiko points out that handle_response_icmp() being common for IPv4 and IPv6 is missing the pseudo-header calculation while validating ICMPv6 messages from real servers which is a problem if checksum is not validated by the hardware. Fix the problems by creating ip_vs_checksum_common_check() helper and use it for TCP/UDP/ICMP both for IPv4 and IPv6. Rely on the nf_checksum() for validating the ICMP messages but use it also for TCP and UDP. Use correct IP offset for IP_VS_DBG_RL_PKT for TCP/UDP/SCTP. IPVS packets (TCP/UDP/SCTP/ICMP) do not need checksum validation on LOCAL_OUT (local clients or local real servers) and on FORWARD (traffic from servers on LAN). Do it only on LOCAL_IN, in case nf_checksum() is not called on PRE_ROUTING. Also, ip_vs_checksum_complete() can be marked static.

Package Linux Kernel

Published 2026-09-04

Last modified 2026-09-04

Patch available

Yes

Affected versions

Linux kernel versions 2.6.28 and later are affected. Fixed in 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 and their respective stable series.

Affected from

≥ 2.6.28

Fixed in

✓ 6.1.183 6.1.x ✓ 6.6.151 6.6.x ✓ 6.12.103 6.12.x ✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2

References

6 total

Showing 5 of 6 references View all on NVD

Frequently asked questions

What is CVE-2026-80901?

CVE-2026-80901 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.28 onward and has been patched in 6.1.183, 6.6.151, 6.12.103 and others. CVE-2026-80901 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-80901?

Yes. CVE-2026-80901 has been patched. Fixed versions include 6.1.183, 6.6.151, 6.12.103 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-80901 actively exploited?

No. CVE-2026-80901 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.