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CVE-2026-43083: net: ioam6: fix OOB and missing lock

highCVSS 7CVE-2026-43083

CSIRTS triage

vendor: Linuxproduct: Linux KernelMemory corruption
What
IOAM6 (In-situ Operations, Administration, and Maintenance) has out-of-bounds access and missing synchronization lock.
Who is affected
Linux systems with IPv6 IOAM functionality enabled.
Urgency
High priority; CVSS 7.0 indicates significant memory access and synchronization risks.
Action
Apply kernel patch fixing out-of-bounds access and adding locking to IOAM6.

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
high — CVSS 7
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43083

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-43083coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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