CVE-2026-99064 Linux Kernel - Memory Corruption

Linux kernel contains a vulnerability in cipso_v4_skbuff_delattr() where cached option offsets are not adjusted after removing CIPSO bytes, letting attackers cause incorrect option parsing and potential memory corruption, exploit requires crafted packets.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Memory Corruption
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for cipso option offset adjustment.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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