CVE-2026-74714: bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()

mediumCVSS 4.7CVE-2026-74714

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: BPF TCP iterator has use-after-free in batch processing loop.
Who is affected: Linux systems with BPF programs using tcp iterator functionality.
Urgency: Medium priority; risks memory corruption in BPF context.
Action: Apply kernel patch for bpf_iter_tcp_established_batch use-after-free.

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 4.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74714

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-2026-747140.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74714	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-74714: In the Linux kernel, the following vulnerability has been resolved: bpf: tcp: Fix use-after-fr…nvd

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