firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation (CVE-2026-68400) | HOL Guard CVE

High · CVSS 7.8CVE-2026-68400

firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation

Answer in brief

CVE-2026-68400 records a High severity (CVSS 7.8) vulnerability in firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation. 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 Aug 10, 2026Updated Aug 17, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. 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	>=113580530ee7dc61e668b641d657920734533b9f <b39b08e6bee812514b449dc874076890e6b871a0 \|\| >=113580530ee7dc61e668b641d657920734533b9f <8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66 \|\| >=113580530ee7dc61e668b641d657920734533b9f <b4d961351aa84fdf0148783fb1f3a1391b8a0adb	b39b08e6bee812514b449dc874076890e6b871a0, 8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66, b4d961351aa84fdf0148783fb1f3a1391b8a0adb
Linux/Linuxgeneric	6.7	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b39b08e6bee812514b449dc874076890e6b871a0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation Use the descriptor's `ep_mem_offset` to calculate the start of the endpoint memory access array and to comply with the FF-A spec instead of defaulting to `sizeof(struct ffa_mem_region)`. This requires moving `ffa_mem_region_additional_setup()` earlier in the setup flow. Also, add sanity checks to ensure the calculated descriptor offsets do not exceed `max_fragsize`.

Quoted source text, attributed separately from HOL analysis.