CVE-2024-53091: bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx

mediumCVSS 5.5CVE-2024-53091

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: Missing checks in tls_sw_has_ctx_tx/rx for sk_is_inet and IS_ICSK can lead to memory safety issues in eBPF/BPF TLS handling.
Who is affected: Systems running affected Linux kernel versions with BPF and TLS interaction are exposed.
Urgency: Moderate; CVSS 5.5 indicates medium severity; not yet exploited.
Action: Update to a Linux kernel version that includes the sk_is_inet and IS_ICSK checks in tls_sw_has_ctx_tx/rx.

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-2024-53091

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-2024-530910.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2024-53091	coverage & exploitation status	NVD · CVE.org

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