CVE-2026-89608 Linux kernel eCryptfs - Buffer Size Miscalculation

Linux kernel eCryptfs contains a buffer size miscalculation in ecryptfs_parse_packet_set causing potential buffer over-read, letting attackers cause memory corruption or denial of service, exploit requires crafted eCryptfs packets.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Size Miscalculation
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

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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