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CVE-2026-53036: bpf, arm64: Fix off-by-one in check_imm signed range check

criticalCVSS 9.8CVE-2026-53036

CSIRTS triage

product: bpfOther
What
There is an off-by-one error in the signed range check in bpf for arm64.
Who is affected
Deployments using bpf on arm64 architecture.
Urgency
Remediation is critical urgency due to the critical severity rating.
Action
Apply the patch for bpf to fix the off-by-one error.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53036

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-2026-53036coverage & 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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