ecryptfs: pass packet set buffer size to parser

Answer in brief

CVE-2026-89608 records a Unknown severity vulnerability in ecryptfs: pass packet set buffer size to parser. 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	>=237fead619984cc48818fe12ee0ceada3f55b012 <329de8b9e988b152b938f09224670d97bada0b96 \|\| >=237fead619984cc48818fe12ee0ceada3f55b012 <e5d254e654f2311a3c4b9c791d7f216554bcd17a \|\| >=237fead619984cc48818fe12ee0ceada3f55b012 <747fd45be396a6aea3420ab657a0ab4e60185b05 \|\| >=237fead619984cc48818fe12ee0ceada3f55b012 <2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2	329de8b9e988b152b938f09224670d97bada0b96, e5d254e654f2311a3c4b9c791d7f216554bcd17a, 747fd45be396a6aea3420ab657a0ab4e60185b05, 2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2
Linux/Linuxgeneric	2.6.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 329de8b9e988b152b938f09224670d97bada0b96 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: 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.

Quoted source text, attributed separately from HOL analysis.