CVE-2026-53076: bpf: Fix OOB in pcpu_init_value

mediumCVSS 5.5CVE-2026-53076

CSIRTS triage

product: bpfOther

What: This vulnerability involves an out-of-bounds access in pcpu_init_value.
Who is affected: Deployments using the affected bpf implementation.
Urgency: Remediation is important due to a medium severity rating and potential exploitation.
Action: Apply the fix as soon as it is available.

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 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53076

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-2026-530760.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53076	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownUSN-8665-1: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
highUSN-8619-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8595-3: Linux kernel (AWS) vulnerabilitiesubuntu
highUSN-8574-3: Linux kernel vulnerabilitiesubuntu
highUSN-8618-1: Linux kernel vulnerabilitiesubuntu
highUSN-8609-1: Linux kernel (Azure CVM) vulnerabilitiesubuntu
highUSN-8608-1: Linux kernel (Azure FIPS) vulnerabilitiesubuntu
highUSN-8607-1: Linux kernel (Azure CVM) vulnerabilitiesubuntu
highUSN-8606-1: Linux kernel (Azure) vulnerabilitiesubuntu
highUSN-8595-2: Linux kernel (AWS) vulnerabilitiesubuntu

Recent advisories for bpf

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.

highCVE-2026-74720: In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer stat…nvd · 2026-08-22
highCVE-2026-74715: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix netns reference i…nvd · 2026-08-22
highCVE-2026-74714: In the Linux kernel, the following vulnerability has been resolved: bpf: tcp: Fix use-after-fr…nvd · 2026-08-22
highCVE-2026-74590: In the Linux kernel, the following vulnerability has been resolved: fsverity: Fix bpf_get_fsve…nvd · 2026-08-22
highCVE-2026-74589: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix sk_redir…nvd · 2026-08-22
unknownCVE-2026-74400: In the Linux kernel, the following vulnerability has been resolved: bpf: fix crash in bpf_[set…nvd · 2026-08-15