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Back to active CVEs
Critical · CVSS 9.8CVE-2026-64000

net: hsr: fix potential OOB access in supervision frame handlingCVE-2026-64000

Answer in brief

CVE-2026-64000 records a Critical severity (CVSS 9.8) vulnerability in net: hsr: fix potential OOB access in supervision frame handling. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 19, 2026Updated Oct 19, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Oct 19, 2026
Upstream Advisory

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
8 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=eafaa88b3eb7f28aecb222281655473431d3ef2e <09a37dca090c55ffb1a33f52d8667f1c2367ef48 || >=eafaa88b3eb7f28aecb222281655473431d3ef2e <a4b64f3e9c7b8259f7dd251a0313420ba7c01852 || >=eafaa88b3eb7f28aecb222281655473431d3ef2e <71c986c0ba45b7dc574fae27c83e7b6671556f37 || >=eafaa88b3eb7f28aecb222281655473431d3ef2e <fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7 || >=eafaa88b3eb7f28aecb222281655473431d3ef2e <78607a6854a22a2502f68092202e75a39af4865d || >=eafaa88b3eb7f28aecb222281655473431d3ef2e <f229426072fc865654a60978bb7fda790a051ff309a37dca090c55ffb1a33f52d8667f1c2367ef48, a4b64f3e9c7b8259f7dd251a0313420ba7c01852, 71c986c0ba45b7dc574fae27c83e7b6671556f37, fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7, 78607a6854a22a2502f68092202e75a39af4865d, f229426072fc865654a60978bb7fda790a051ff3
Linux/Linuxgeneric5.16Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 09a37dca090c55ffb1a33f52d8667f1c2367ef48 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Mongoose: Heap OOB reads and null-byte bypass in mg_path_is_sane (util.c)Also CWE-125
  • VeraCrypt: Heap overflow and out-of-bounds read in Serializable deserialization (elevated Core service input path)Also CWE-125