In the Linux kernel, the following vulnerability has been resolved:

ecryptfs: reject too-small tag 70 packets

ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the
parsed packet body size to derive the encrypted filename size. A
malformed packet with a body smaller than those fixed fields can underflow
that size calculation.

Reject tag 70 packets before the subtraction unless the body contains the
signature, cipher code, and at least one byte of encrypted filename data.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
9c79f34f7ee71cd28272332b424ca64b2be006ab affected < 9d88391bbed76eb091cddd50b0af87b1c6f22589
9c79f34f7ee71cd28272332b424ca64b2be006ab affected < b31da1ecf13929a8d7f8d2727843d2fe35396b75
9c79f34f7ee71cd28272332b424ca64b2be006ab affected < d2869768eab5648e6edc05f47e0716e5328e6681
9c79f34f7ee71cd28272332b424ca64b2be006ab affected < e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f
Linux Linux affected
Version Status Constraints
2.6.29 affected —
0 unaffected < 2.6.29
6.12.109 unaffected ≤ 6.12.*
6.18.50 unaffected ≤ 6.18.*
7.2.4 unaffected ≤ 7.2.*
7.3-rc1 unaffected ≤ *

No data.

No data.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/9d88391bbed76eb091cddd50b0af87b1c6f22589 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/b31da1ecf13929a8d7f8d2727843d2fe35396b75 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/d2869768eab5648e6edc05f47e0716e5328e6681 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-89606 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-89606 cve-icon
History

Sat, 12 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-191
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ecryptfs: reject too-small tag 70 packets ecryptfs_parse_tag_70_packet() subtracts fixed metadata fields from the parsed packet body size to derive the encrypted filename size. A malformed packet with a body smaller than those fixed fields can underflow that size calculation. Reject tag 70 packets before the subtraction unless the body contains the signature, cipher code, and at least one byte of encrypted filename data.
Title ecryptfs: reject too-small tag 70 packets
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-11T19:45:08.832Z

Reserved: 2026-09-11T19:38:34.733Z

Link: CVE-2026-89606

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T20:19:45.603

Modified: 2026-09-11T20:19:45.603

Link: CVE-2026-89606

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-11T19:45:08Z

Links: CVE-2026-89606 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T06:45:10Z

Weaknesses