radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0.
CVE-2026-81886
MEDIUMPre-NVD 5.55.5—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 5.5(medium)
- EG Risk
- 25(Track)EG Risk 25/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity55% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 7%
- KEV
- Not listed
Published
September 22, 2026
Last Modified
September 23, 2026
Advisory Details (5)
Auto-updated Sep 22, 2026🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
6.2.0
Patch available: radareorg/radare2 6.2.0
https://github.com/radareorg/radare2/releases/tag/6.2.0github_commit
commit a7519fdb4da6 (radareorg/radare2)
Fix landed in radareorg/radare2 commit a7519fdb4da6 — awaiting tagged release
https://github.com/radareorg/radare2/commit/a7519fdb4da6835c2cecd8fe248e7dd1133cf17agithub_pr
Dmp
Fix merged in radareorg/radare2 PR #26180 on 2026-07-06 — awaiting tagged release
https://github.com/radareorg/radare2/pull/26180generic🟡 PoC Available
[Security] Unbounded allocation loop in dmp64 parser via attacker-controlled PageCount (DoS) · Issue #26224 · radareorg/radare2 · GitHub
https://github.com/radareorg/radare2/issues/26224github Patch Available
Uncontrolled memory allocation in radare2 dmp64 parser · Advisory · radareorg/radare2 · GitHub
https://github.com/radareorg/radare2/security/advisories/GHSA-3xrx-wh64-8xr8Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-23 18:39 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescore
- 2026-09-22 18:33 UTCEG score recompute
- 2026-09-22 17:53 UTCEG score recompute
- 2026-09-22 16:20 UTCEG score recompute
- 2026-09-22 15:19 UTCEG score recompute
- 2026-09-22 15:19 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-81886?
CVE-2026-81886 is a medium vulnerability published on September 22, 2026. radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop.…
When was CVE-2026-81886 disclosed?
CVE-2026-81886 was first published in the National Vulnerability Database on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81886 actively exploited?
CVE-2026-81886 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.1% of all scored CVEs.
What is the CVSS score of CVE-2026-81886?
CVE-2026-81886 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-81886?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81886, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-81886
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