CVE-2026-89608

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: pass packet set buffer size to parser ecryptfs_parse_packet_set() receives a pointer into the file header, but it calculates the remaining packet buffer size from PAGE_SIZE - 8. For version 1 headers the packet set starts later in the header, so this can overstate the available buffer. Pass the actual packet set buffer length from the caller and calculate per-packet limits from the remaining bytes in that buffer. Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2
https://git.kernel.org/stable/c/329de8b9e988b152b938f09224670d97bada0b96
https://git.kernel.org/stable/c/3bd9bb3e167a7c14a50423f6ff03ee0fb007199d
https://git.kernel.org/stable/c/66a87559ecb26afe80ad512faf728a158e2b81da
https://git.kernel.org/stable/c/747fd45be396a6aea3420ab657a0ab4e60185b05
https://git.kernel.org/stable/c/749fa08d8f1b318bd8f4669a14a8a4a8c1bbdaac
https://git.kernel.org/stable/c/e5d254e654f2311a3c4b9c791d7f216554bcd17a
https://git.kernel.org/stable/c/e7573b0e3058c6bbdfe81673f22c09900fde9e65

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:19

Updated : 2026-09-14 13:19

NVD link : CVE-2026-89608

Mitre link : CVE-2026-89608

CVE.ORG link : CVE-2026-89608

JSON object : View

Products Affected

No product.

CWE

No CWE.

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For\nversion 1 headers the packet set starts later in the header, so this can\noverstate the available buffer.\n\nPass the actual packet set buffer length from the caller and calculate\nper-packet limits from the remaining bytes in that buffer. Recompute the\nremaining length after consuming a tag 3 packet before parsing the\nfollowing tag 11 packet."}], "lastModified": "2026-09-14T13:19:15.080", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}