Kernel-level privilege escalation in the Linux kernel SRv6 IPv6 path; Linux is ubiquitous across servers, cloud, containers and devices—high-impact if exploited.
CVE-2026-80976
Local Linux kernel privilege escalation via SRv6 IPv6 decapsulation
Is CVE-2026-80976 being exploited?
Not confirmed. CVE-2026-80976 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.70% probability of exploitation in the next 30 days.
How severe is CVE-2026-80976?
CVE-2026-80976 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-80976?
Yes. A fix has been recorded for CVE-2026-80976. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-80976 affect?
CVE-2026-80976 affects Linux kernel (seg6 / SRv6 IPv6 decapsulation), Servers and VMs running vulnerable kernels, Containers and network namespaces using affected kernels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-80976?
Apply kernel stable patches or upgrade Linux kernel; restrict SRv6/IPv6 extension header exposure.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unprivileged attacker can send crafted SRv6/IPv6 packets to trigger kernel out-of-bounds access, enabling local privilege escalation or kernel crash (DoS).
Immediate action required
- affected>= d7a669dd2f8ba07a17423f4ad586dfc0379882f7 and < 2b154e96fcb3f01fd42765c64e0a56820fbc16eb
- affected>= d7a669dd2f8ba07a17423f4ad586dfc0379882f7 and < cfa186a0857a0f831dfca67b16bbc40ecfdf3280
- affected>= d7a669dd2f8ba07a17423f4ad586dfc0379882f7 and < c73fb911e02b9a766c950bc9707f3e3a96ffd702
- affected>= d7a669dd2f8ba07a17423f4ad586dfc0379882f7 and < f967455fb2a5a2079b9eb5823e9ccf359174bf9f
- affected4.14
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.