s390/ism: folio_put() after error

Answer in brief

CVE-2026-98024 records a Unknown severity vulnerability in s390/ism: folio_put() after error. 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	>=83781384a96b95e2b6403d3c8a002b2c89031770 <890e2ef726904d1d8328e4b9f5090eeb8761b9d1 \|\| >=83781384a96b95e2b6403d3c8a002b2c89031770 <eebb6a9017b55ac05be770cf7b89f9da49505ae7 \|\| >=83781384a96b95e2b6403d3c8a002b2c89031770 <60983356fab0c1171c5cb1b56a36349ebadc608e \|\| >=83781384a96b95e2b6403d3c8a002b2c89031770 <907a56ab3eb8a58500a58daa76087f17bb2b6826 \|\| 121fb75414ab8debafd548bded9d888cd5a8f165 \|\| f3e23edc4917f72139b805f208aeadf23376a0b5 \|\| >=6.6.29 <6.7 \|\| >=6.8.8 <6.9	890e2ef726904d1d8328e4b9f5090eeb8761b9d1, eebb6a9017b55ac05be770cf7b89f9da49505ae7, 60983356fab0c1171c5cb1b56a36349ebadc608e, 907a56ab3eb8a58500a58daa76087f17bb2b6826, 6.7, 6.9
Linux/Linuxgeneric	6.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 890e2ef726904d1d8328e4b9f5090eeb8761b9d1 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: s390/ism: folio_put() after error dmb->cpu_addr was allocated via folio_alloc(). Use folio_put() instead of kfree() in the error exit of ism_alloc_dmb() to avoid slab allocator corruption. While at it, reset dmb->cpu_addr after folio_put to avoid unintentional UAF by future callers.

Quoted source text, attributed separately from HOL analysis.