EUVD-2026-33423Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
2DescriptionGitHub Advisory
Rizin is a UNIX-like reverse engineering framework and command-line toolset. There is a heap-buffer-overflow in librz/bin/format/omf/omf.c. This vulnerability is fixed by commit e6d0937c8a083e23ed76ccfb9f631cdc50c7af47.
AnalysisAI
Heap out-of-bounds read in Rizin's OMF binary parser exposes heap memory contents when a user opens a maliciously crafted Object Module Format file. An off-by-one bounds check error in the rz_bin_omf_get_entry function within librz/bin/format/omf/omf.c allows array access one element past the end of the allocated sections array, resulting in limited confidentiality impact (heap data disclosure). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must explicitly open a crafted OMF (Object Module Format) binary file using Rizin, specifically triggering the `rz_bin_omf_get_entry` code path during binary parsing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.3 score is well-calibrated and reflects genuinely low real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts an OMF object file containing a symbol entry whose `seg_idx` value equals `nb_section + 1`, causing the original off-by-one bounds check to pass and triggering a read of the heap pointer immediately past the sections array. When a reverse engineer loads this file into Rizin for analysis - for example, while triaging a suspicious legacy binary - the parser reads out-of-bounds heap data, potentially leaking a pointer or adjacent allocation contents. … |
| Remediation | The upstream fix is available via commit e6d0937c8a083e23ed76ccfb9f631cdc50c7af47 (https://github.com/rizinorg/rizin/commit/e6d0937c8a083e23ed76ccfb9f631cdc50c7af47); users should update to the Rizin release that includes this commit once a tagged version is published - the exact patched release version is not confirmed from available data, so monitor the GitHub advisory at https://github.com/rizinorg/rizin/security/advisories/GHSA-wprr-wrcw-mw6v for release details. … Detailed patch versions, workarounds, and compensating controls in full report. |
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