CVE-2026-74659: net: bridge: mrp: fix uninitialised bytes on the wire

lowCVSS 2.3CVE-2026-74659

CSIRTS triage

vendor: Linux product: Linux kernel Information disclosure

What: Uninitialized bytes transmitted on wire in network bridge MRP (Media Redundancy Protocol) implementation.
Who is affected: Systems running Linux kernel with bridge MRP functionality enabled.
Urgency: Low severity (CVSS 2.3) information disclosure; not currently exploited.
Action: Update to patched Linux kernel version containing the bridge MRP uninitialized bytes fix.

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: low — CVSS 2.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74659

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-2026-746590.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74659	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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