EUVD-2026-34082
GHSA-xhgw-qwwf-pg32
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability has been found in cilium ebpf up to 0.21.0. This affects the function loadRawSpec of the file btf/btf.go of the component LoadCollectionSpec/LoadCollectionSpecFromReader. Such manipulation leads to integer overflow. The attack can only be performed from a local environment. The exploit has been disclosed to the public and may be used. The name of the patch is 533dfc82fd228bfadf42ea7180c39de7d9af47fa. A patch should be applied to remediate this issue.
AnalysisAI
Integer overflow in the cilium/ebpf Go library (versions up to 0.21.0) allows a local authenticated user to cause an availability impact by supplying crafted BPF Type Format (BTF) data to the LoadCollectionSpec or LoadCollectionSpecFromReader APIs. The flaw resides in the loadRawSpec function where 32-bit header field arithmetic was performed using signed int types, enabling overflow to bypass bounds checks on StringOff, StringLen, TypeOff, and TypeLen fields. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local authenticated access with at minimum low-privilege credentials on the target system (PR:L, AV:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.3 (Low) accurately reflects the constrained threat model: AV:L requires physical or shell-level local access, PR:L confirms a low-privileged authenticated user is required, and the impact is limited to A:L (partial availability degradation) with no confidentiality or integrity consequences (C:N/I:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local user with standard authenticated access to a developer workstation or container host supplies a maliciously crafted eBPF ELF object file with header fields StringOff, StringLen, TypeOff, or TypeLen set to values that overflow signed 32-bit arithmetic when summed. When an application calls LoadCollectionSpec on this file, the integer overflow bypasses the buffer bounds check in loadRawSpec, causing an out-of-bounds read and crashing the process. … |
| Remediation | Apply the upstream fix by updating the cilium/ebpf dependency to a version that includes commit 533dfc82fd228bfadf42ea7180c39de7d9af47fa, available via PR #2021 at https://github.com/cilium/ebpf/pull/2021. … Detailed patch versions, workarounds, and compensating controls in full report. |
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