CVE-2022-50167: bpf: fix potential 32-bit overflow when accessing ARRAY map element

mediumCVSS 5.5CVE-2022-50167

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: The BPF subsystem can overflow a 32-bit value when accessing ARRAY map elements, potentially causing incorrect memory access.
Who is affected: Systems running Linux kernel with BPF enabled and using ARRAY map type.
Urgency: Medium priority; CVSS 5.5 and not yet exploited, but affects core in-kernel VM functionality.
Action: Apply kernel patch fixing 32-bit overflow check in BPF ARRAY map access logic.

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

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-50167

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-2022-501670.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2022-50167	coverage & exploitation status	NVD · CVE.org

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.

mediumCVE-2026-64507: x86/bugs: Enable IBPB flush on BPF JIT allocationmsrc · 2026-08-06
mediumCVE-2024-46754: bpf: Remove tst_run from lwt_seg6local_prog_ops.msrc · 2026-08-06
mediumCVE-2023-52920: bpf: support non-r10 register spill/fill to/from stack in precision trackingmsrc · 2026-08-06
highCVE-2026-45932: bpf: Fix tcx/netkit detach permissions when prog fd isn't givenmsrc · 2026-08-06
mediumCVE-2024-47728: bpf: Zero former ARG_PTR_TO_{LONGINT} args in case of errormsrc · 2026-08-06
highCVE-2026-64508: bpf: Support for hardening against JIT sprayingmsrc · 2026-08-06