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VULNERABILITIES

CVE-2026-97990 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/0d195797a80b77f2ec56718cd26d3ee65d0093e8 kernel.org
https://git.kernel.org/stable/c/2bbf1c1f69991e28787e02b0a2f826289d5fc730 kernel.org
https://git.kernel.org/stable/c/3af20238a09ca180d66623e3bed16b64e9975f39 kernel.org
https://git.kernel.org/stable/c/c001abcde865b74231da8f1412c3217dbf66781e kernel.org

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-97990
NVD Published Date:
Sep 25, 2026
NVD Last Modified:
Sep 25, 2026
Source:
kernel.org
CVE-2026-97990 Details - Not Deferred