vdpa_sim_net: check TX pull result before RX copy (CVE-2026-97990) | HOL Guard CVE

High · CVSS 7.5CVE-2026-97990

vdpa_sim_net: check TX pull result before RX copy

Answer in brief

CVE-2026-97990 records a High severity (CVSS 7.5) vulnerability in vdpa_sim_net: check TX pull result before RX copy. 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: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. 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	>=cfe226892913a448e83e7a19db93862baa3cb99c <c001abcde865b74231da8f1412c3217dbf66781e \|\| >=cfe226892913a448e83e7a19db93862baa3cb99c <3af20238a09ca180d66623e3bed16b64e9975f39 \|\| >=cfe226892913a448e83e7a19db93862baa3cb99c <2bbf1c1f69991e28787e02b0a2f826289d5fc730 \|\| >=cfe226892913a448e83e7a19db93862baa3cb99c <0d195797a80b77f2ec56718cd26d3ee65d0093e8	c001abcde865b74231da8f1412c3217dbf66781e, 3af20238a09ca180d66623e3bed16b64e9975f39, 2bbf1c1f69991e28787e02b0a2f826289d5fc730, 0d195797a80b77f2ec56718cd26d3ee65d0093e8
Linux/Linuxgeneric	5.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to c001abcde865b74231da8f1412c3217dbf66781e 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: vdpa_sim_net: check TX pull result before RX copy vringh_iov_pull_iotlb() returns a signed byte count. A failed TX pull is currently added to the unsigned byte counter and then passed as a size_t length to receive_filter() and vringh_iov_push_iotlb(). A negative error can therefore become a large length in the RX path. Handle non-positive pull results before every length use. Count the TX error and complete the consumed TX descriptor with zero bytes. I found this bug myself, though the patch was written with AI assistance.

Quoted source text, attributed separately from HOL analysis.