CVE-2024-47702: bpf: Fail verification for sign-extension of packet data/data_end/data_meta
CSIRTS triage
- What
- BPF verifier fails to properly reject sign-extension operations on packet data pointers, potentially allowing out-of-bounds access.
- Who is affected
- Systems running Linux kernel with eBPF enabled and executing untrusted BPF programs.
- Urgency
- Medium priority with CVSS 5.5; not exploited but represents kernel stability risk.
- Action
- Apply kernel patch to tighten BPF verifier constraints.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-47702
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-2024-477020.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-47702 | 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.
- highCVE-2026-45932: bpf: Fix tcx/netkit detach permissions when prog fd isn't givenmsrc · 2026-08-06
- mediumCVE-2024-42151: bpf: mark bpf_dummy_struct_ops.test_1 parameter as nullablemsrc · 2026-08-06
- mediumCVE-2025-37959: bpf: Scrub packet on bpf_redirect_peermsrc · 2026-08-06
- mediumCVE-2023-52920: bpf: support non-r10 register spill/fill to/from stack in precision trackingmsrc · 2026-08-06
- mediumCVE-2024-47728: bpf: Zero former ARG_PTR_TO_{LONGINT} args in case of errormsrc · 2026-08-06
- highCVE-2026-43009: bpf: Fix incorrect pruning due to atomic fetch precision trackingmsrc · 2026-08-06
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