ecryptfs: reject too-small tag 70 packets

Answer in brief

CVE-2026-89606 records a Unknown severity vulnerability in ecryptfs: reject too-small tag 70 packets. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=9c79f34f7ee71cd28272332b424ca64b2be006ab <9d88391bbed76eb091cddd50b0af87b1c6f22589 \|\| >=9c79f34f7ee71cd28272332b424ca64b2be006ab <b31da1ecf13929a8d7f8d2727843d2fe35396b75 \|\| >=9c79f34f7ee71cd28272332b424ca64b2be006ab <d2869768eab5648e6edc05f47e0716e5328e6681 \|\| >=9c79f34f7ee71cd28272332b424ca64b2be006ab <e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f	9d88391bbed76eb091cddd50b0af87b1c6f22589, b31da1ecf13929a8d7f8d2727843d2fe35396b75, d2869768eab5648e6edc05f47e0716e5328e6681, e97bbe1b2bd82ec2ae37ad2e4965b4d3e78bbf7f
Linux/Linuxgeneric	2.6.29	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9d88391bbed76eb091cddd50b0af87b1c6f22589 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.