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CVE-2026-23383: bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing

mediumCVSS 6.4CVE-2026-23383

CSIRTS triage

vendor: Linuxproduct: Linux KernelMemory corruption
What
The ARM64 BPF JIT buffer does not enforce 8-byte alignment, allowing atomic tearing attacks.
Who is affected
ARM64 systems running affected Linux kernel versions with BPF JIT compilation enabled.
Urgency
Medium severity (CVSS 6.4) memory consistency issue; patch within standard update cycle.
Action
Update Linux kernel to a version enforcing 8-byte alignment for ARM64 BPF JIT buffers.

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 6.4
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23383

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-2026-23383coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for bpf, arm64

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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