CVE-2026-74582: packet: use consistent hard_header_len in non-ring send paths

mediumCVSS 5.7CVE-2026-74582

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Inconsistent hard_header_len handling in packet send paths can cause memory corruption or data corruption.
Who is affected: Systems running vulnerable Linux kernel versions using packet socket send operations.
Urgency: Medium priority; memory corruption risk warrants timely patching.
Action: Apply kernel security update addressing CVE-2026-74582 when available.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74582

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-2026-745820.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74582	coverage & exploitation status	NVD · CVE.org

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