svcrdma: Reject Read lists that exceed the page budget (CVE-2026-89528) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89528

svcrdma: Reject Read lists that exceed the page budget

Answer in brief

CVE-2026-89528 records a Unknown severity vulnerability in svcrdma: Reject Read lists that exceed the page budget. 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 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 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	>=026d958b38c628a1b4ced534808945365e2747a5 <1a3af2262cb384112ef38632de4690682be528b4 \|\| >=026d958b38c628a1b4ced534808945365e2747a5 <465f511f59a0fa7a80d5d1073c4b24f28ea38f58 \|\| >=026d958b38c628a1b4ced534808945365e2747a5 <0ca487abb3bdf581851664b5db21f364caf57682	1a3af2262cb384112ef38632de4690682be528b4, 465f511f59a0fa7a80d5d1073c4b24f28ea38f58, 0ca487abb3bdf581851664b5db21f364caf57682
Linux/Linuxgeneric	4.13	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1a3af2262cb384112ef38632de4690682be528b4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Read lists that exceed the page budget Individual Read segment lengths are validated at decode time, but nothing prevents a requester from sending multiple segments whose cumulative length exceeds the rq_pages array budget. When one segment fills the page array exactly, the runtime guard in svc_rdma_build_read_segment() is bypassed because len reaches zero. A subsequent segment then accesses the NULL sentinel slot at rq_pages[rq_maxpages], resulting in a NULL pointer dereference during DMA mapping. Accumulate pages across all Read segments and reject the message at decode time when the total would overflow the page budget.

Quoted source text, attributed separately from HOL analysis.