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CVE-2026-64000

CRITICALCVSS 9.8/10EPSS 0.49%

Last modified

CVE-2026-64000 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix potential OOB access in supervision frame handling Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix potential OOB access in supervision frame handling Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.

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
0.49%

39.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= eafaa88b3eb7f28aecb222281655473431d3ef2e, < 09a37dca090c55ffb1a33f52d8667f1c2367ef48; >= eafaa88b3eb7f28aecb222281655473431d3ef2e, < a4b64f3e9c7b8259f7dd251a0313420ba7c01852; >= eafaa88b3eb7f28aecb222281655473431d3ef2e, < 71c986c0ba45b7dc574fae27c83e7b6671556f37; >= eafaa88b3eb7f28aecb222281655473431d3ef2e, < fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7; >= eafaa88b3eb7f28aecb222281655473431d3ef2e, < 78607a6854a22a2502f68092202e75a39af4865d; >= eafaa88b3eb7f28aecb222281655473431d3ef2e, < f229426072fc865654a60978bb7fda790a051ff3
LinuxLinux5.16

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-64000?
In the Linux kernel, the following vulnerability has been resolved: net: hsr: fix potential OOB access in supervision frame handling Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.
How severe is CVE-2026-64000?
CVE-2026-64000 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64000?
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