scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails (CVE-2026-90267) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90267

scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

Answer in brief

CVE-2026-90267 records a Unknown severity vulnerability in scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails. 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 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 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	>=81d926e8b5520e38f1f72dd7bb7cfc81c1a69d87 <5d7d1b8b525e5eff33a01d07dfcf7bdd3b6d790d \|\| >=81d926e8b5520e38f1f72dd7bb7cfc81c1a69d87 <bb31844d88b77138b67aa20c3600203baff40140	5d7d1b8b525e5eff33a01d07dfcf7bdd3b6d790d, bb31844d88b77138b67aa20c3600203baff40140
Linux/Linuxgeneric	4.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 5d7d1b8b525e5eff33a01d07dfcf7bdd3b6d790d if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

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

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails sd_set_special_bvec() allocates a special payload page for UNMAP and WRITE SAME commands. If scsi_alloc_sgtables() fails afterward in sd_setup_unmap_cmnd() or sd_setup_write_same{10,16}_cmnd(), the SCSI midlayer does not call uninit_command() because RQF_DONTPREP is not set yet, leaking the page. Call sd_uninit_command() on error, and clear RQF_SPECIAL_PAYLOAD after freeing the page.

Quoted source text, attributed separately from HOL analysis.