soc: xilinx: Shutdown and free rx mailbox channel (CVE-2026-80654) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80654

soc: xilinx: Shutdown and free rx mailbox channel

Answer in brief

CVE-2026-80654 records a Unknown severity vulnerability in soc: xilinx: Shutdown and free rx mailbox channel. 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 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 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	>=ffdbae28d9d1af70b7d63ffd7827e9795cd8d0df <b0f748c563921a7918c78e6a599cefd54de7d688 \|\| >=ffdbae28d9d1af70b7d63ffd7827e9795cd8d0df <a83e77d1e52c01c50096e6e97c57d34e0590d628 \|\| >=ffdbae28d9d1af70b7d63ffd7827e9795cd8d0df <b5d2240c2c7bc8370e7ba54a2e1fe3919f55aee5 \|\| >=ffdbae28d9d1af70b7d63ffd7827e9795cd8d0df <fdee7c66c0d7b6869c36b9f9a915abf29ab5b550	b0f748c563921a7918c78e6a599cefd54de7d688, a83e77d1e52c01c50096e6e97c57d34e0590d628, b5d2240c2c7bc8370e7ba54a2e1fe3919f55aee5, fdee7c66c0d7b6869c36b9f9a915abf29ab5b550
Linux/Linuxgeneric	5.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b0f748c563921a7918c78e6a599cefd54de7d688 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: soc: xilinx: Shutdown and free rx mailbox channel A mbox rx channel is requested using mbox_request_channel_byname() in probe. In remove callback, the rx mailbox channel is cleaned up when the rx_chan is NULL due to incorrect condition check. The mailbox channel is not shutdown and it can receive messages even after the device removal. This leads to use after free. Also the channel resources are not freed. Fix this by checking the rx_chan correctly.

Quoted source text, attributed separately from HOL analysis.