Critical severity · published Jul 19, 2026
CVE-2026-64000
net: hsr: fix potential OOB access in supervision frame handling
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.16 before 6.1.176; 6.2 before 6.6.143; 6.7 before 6.12.93; 6.13 before 6.18.35; 6.19 before 7.0.12; 7.1; +4 more · source: NVD
LI
Linux · Linux
eafaa88b3eb7f28aecb222281655473431d3ef2e before 09a37dca090c55ffb1a33f52d8667f1c2367ef48; eafaa88b3eb7f28aecb222281655473431d3ef2e before a4b64f3e9c7b8259f7dd251a0313420ba7c01852; eafaa88b3eb7f28aecb222281655473431d3ef2e before 71c986c0ba45b7dc574fae27c83e7b6671556f37; eafaa88b3eb7f28aecb222281655473431d3ef2e before fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7; eafaa88b3eb7f28aecb222281655473431d3ef2e before 78607a6854a22a2502f68092202e75a39af4865d; eafaa88b3eb7f28aecb222281655473431d3ef2e before f229426072fc865654a60978bb7fda790a051ff3; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64000
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-64000
Patch
https://git.kernel.org/stable/c/09a37dca090c55ffb1a33f52d8667f1c2367ef48
Patch
https://git.kernel.org/stable/c/71c986c0ba45b7dc574fae27c83e7b6671556f37
Patch
https://git.kernel.org/stable/c/78607a6854a22a2502f68092202e75a39af4865d
Patch
https://git.kernel.org/stable/c/a4b64f3e9c7b8259f7dd251a0313420ba7c01852
Patch
https://git.kernel.org/stable/c/f229426072fc865654a60978bb7fda790a051ff3
Patch
https://git.kernel.org/stable/c/fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7
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