CVE-2026-64000
Critical
net: hsr: fix potential OOB access in supervision frame handling
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.
Exploit probability
0.5%
Published
July 19, 2026
Required by
Not available
Last source change
August 12, 2026
02 / AFFECTED SOFTWARE
Affected packages
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2026-64000
View original source
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/09a37dca090c55ffb1a33f52d8667f1c2367ef48
- https://git.kernel.org/stable/c/71c986c0ba45b7dc574fae27c83e7b6671556f37
- https://git.kernel.org/stable/c/78607a6854a22a2502f68092202e75a39af4865d
- https://git.kernel.org/stable/c/a4b64f3e9c7b8259f7dd251a0313420ba7c01852
- https://git.kernel.org/stable/c/f229426072fc865654a60978bb7fda790a051ff3
- https://git.kernel.org/stable/c/fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64000.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64000