mmc: loongson2: Fix sg iteration in data reorder functions (CVE-2026-80748) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80748

mmc: loongson2: Fix sg iteration in data reorder functions

Answer in brief

CVE-2026-80748 records a Unknown severity vulnerability in mmc: loongson2: Fix sg iteration in data reorder functions. 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 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 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	>=2115772014bdac368317e997ed15016cf2792665 <8f7f7a6d5aed8f346a1c936fba02033c73a337dc \|\| >=2115772014bdac368317e997ed15016cf2792665 <db368164383c46f256ed8152a41ae9300e615028 \|\| >=2115772014bdac368317e997ed15016cf2792665 <00179ed9fbe07799676e2cb63c4e7f0e7cd80a5c	8f7f7a6d5aed8f346a1c936fba02033c73a337dc, db368164383c46f256ed8152a41ae9300e615028, 00179ed9fbe07799676e2cb63c4e7f0e7cd80a5c
Linux/Linuxgeneric	6.17	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 8f7f7a6d5aed8f346a1c936fba02033c73a337dc if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: mmc: loongson2: Fix sg iteration in data reorder functions In ls2k0500_mmc_reorder_cmd_data() and ls2k2000_mmc_reorder_cmd_data(), the for_each_sg() macro already iterates over the scatterlist entries, with 'sg' pointing to the current entry. However, the code incorrectly uses '&sg[i]' and 'sg_dma_len(&sg[i])' inside the loop, which treats 'sg' as an array base and indexes it again, leading to access of wrong sg entries (or out-of-bounds if the list is not an array).

Quoted source text, attributed separately from HOL analysis.