ALSA: ump: do not touch legacy_rmidi before it exists (CVE-2026-98086) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98086

ALSA: ump: do not touch legacy_rmidi before it exists

Answer in brief

CVE-2026-98086 records a Unknown severity vulnerability in ALSA: ump: do not touch legacy_rmidi before it exists. 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 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	>=37e0e14128e0685267dc5c037bf655421a6ce2ea <1c8e01792adf91879322f1ad752f1814de8b7e7d \|\| >=37e0e14128e0685267dc5c037bf655421a6ce2ea <228075f31b141395233218712242913125ace4e0 \|\| >=37e0e14128e0685267dc5c037bf655421a6ce2ea <a4cef20cd473e0640fefd38094d4baac0ec76ae3 \|\| >=37e0e14128e0685267dc5c037bf655421a6ce2ea <adeee7187694719890aaffdc14b7e89cfd736f1d	1c8e01792adf91879322f1ad752f1814de8b7e7d, 228075f31b141395233218712242913125ace4e0, a4cef20cd473e0640fefd38094d4baac0ec76ae3, adeee7187694719890aaffdc14b7e89cfd736f1d
Linux/Linuxgeneric	6.5	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1c8e01792adf91879322f1ad752f1814de8b7e7d if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: do not touch legacy_rmidi before it exists snd_ump_parse_endpoint() sets ump->parsed on every exit, including error, before the caller attaches the legacy rawmidi device. ump_handle_ep_name_msg() then treats parsed as "legacy_rmidi is live" and calls ump_legacy_set_rawmidi_name(), which snprintf()s into ump->legacy_rmidi->name. If a UMP packet arrives in that window (IRQ path from snd_ump_receive), legacy_rmidi is still NULL (KASAN null-ptr-deref in snprintf). Guard the legacy helpers. parsed only means endpoint info was parsed, not that legacy_rmidi exists.

Quoted source text, attributed separately from HOL analysis.