Bug 2502433 (CVE-2026-64000) - CVE-2026-64000 kernel: net: hsr: fix potential OOB access in supervision frame handling
Summary: CVE-2026-64000 kernel: net: hsr: fix potential OOB access in supervision fram...
Keywords:
Status: NEW
Alias: CVE-2026-64000
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:07 UTC by OSIDB Bzimport
Modified: 2026-07-21 16:29 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-19 16:07:52 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-07-21 16:25:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-64000-fb1e@gregkh/T
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