CVE-2026-64000
net: hsr: fix potential OOB access in supervision frame handling
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 30, 2026, 2:51 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the kernel patch for HSR supervision frame handling.
- Ensure the entire TLV header is linearized before access.
- Update the Linux kernel to the latest security version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64000.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64000 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64000
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64000 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64000 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': '09a37dca090c55ffb1a33f52d8667f1c2367ef48', 'versionType': 'git'}, {'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': 'a4b64f3e9c7b8259f7dd251a0313420ba7c01852', 'versionType': 'git'}, {'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': '71c986c0ba45b7dc574fae27c83e7b6671556f37', 'versionType': 'git'}, {'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': 'fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7', 'versionType': 'git'}, {'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': '78607a6854a22a2502f68092202e75a39af4865d', 'versionType': 'git'}, {'status': 'affected', 'version': 'eafaa88b3eb7f28aecb222281655473431d3ef2e', 'lessThan': 'f229426072fc865654a60978bb7fda790a051ff3', 'versionType': 'git'}], 'programFiles': ['net/hsr/hsr_forward.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.12', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/hsr/hsr_forward.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/09a37dca090c55ffb1a33f52d8667f1c2367ef48 Added Reference https://git.kernel.org/stable/c/71c986c0ba45b7dc574fae27c83e7b6671556f37 Added Reference https://git.kernel.org/stable/c/78607a6854a22a2502f68092202e75a39af4865d Added Reference https://git.kernel.org/stable/c/a4b64f3e9c7b8259f7dd251a0313420ba7c01852 Added Reference https://git.kernel.org/stable/c/f229426072fc865654a60978bb7fda790a051ff3 Added Reference https://git.kernel.org/stable/c/fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7