CVE-2026-46289: lib/scatterlist: fix length calculations in extract_kvec_to_sg

CSIRTS triage

What

Fix length calculations in extract_kvec_to_sg to prevent issues.

Who is affected

Users of the Linux Kernel that utilize scatterlist functionalities.

Urgency

This medium severity issue should be addressed to ensure proper functionality.

Action

Upgrade to a patched version of the Linux Kernel.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

medium — CVSS 5.5

Published

2026-06-09

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46289

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-462890.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[UPDATE] [high] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund
• unknownUSN-8492-5: Linux kernel (FIPS) vulnerabilitiesubuntu
• unknownUSN-8492-4: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
• unknownUSN-8490-2: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu

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