CVE-2025-22057: net: decrease cached dst counters in dst_release

mediumCVSS 6.6CVE-2025-22057

CSIRTS triage

Denial of service

What: The network stack's destination cache reference counting has a bug causing incorrect counter updates in dst_release.
Who is affected: All systems using the affected Linux kernel versions with high-traffic network conditions are at risk.
Urgency: Medium; resource exhaustion leading to network availability issues with CVSS 6.6.
Action: Update to a patched Linux kernel version with corrected dst cache counter management.

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 6.6
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-22057

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-2025-220570.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-22057	coverage & exploitation status	NVD · CVE.org

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