libmikmod before 3.3.14 contains an integer overflow in the Oktalyzer loader OKT_doPBOD() that allows attackers to cause heap buffer overflow via crafted track counts. Attackers can supply an OKT module whose SLEN chunk wraps the 16-bit numtrk value, causing PBOD writes past allocated track pointers for crashes or code execution.
CVE-2026-105839
HIGHPre-NVD 7.87.8—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-10-06. A secondary CVSS source baseline 7.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.8Exploit: None knownExposed services: Not assessed
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8HIGHhigh confidence
- EG Risk
- 35EG Risk 35/100CISA SSVC
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 computedSeverity78% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).
An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 6, 2026
Last Modified
October 6, 2026
Advisory Details (5)
Auto-updated Oct 6, 2026Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
libmikmod before 3.3.14 Heap Buffer Overflow via OKT Loader OKT_doPBOD | Advisories | VulnCheck
https://www.vulncheck.com/advisories/libmikmod-before-3.3.14-heap-buffer-overflow-via-okt-loader-okt-dopbodgeneric
GitHub - sezero/mikmod: Mikmod Sound System (mirror of git repo at https://sf.net/projects/mikmod/) · GitHub
https://github.com/sezero/mikmodgeneric
mikmod/libmikmod/NEWS at libmikmod-3.3.14 · sezero/mikmod · GitHub
https://github.com/sezero/mikmod/blob/libmikmod-3.3.14/libmikmod/NEWSgeneric
mikmod/libmikmod/loaders/load_okt.c at libmikmod-3.3.13 · sezero/mikmod · GitHub
https://github.com/sezero/mikmod/blob/libmikmod-3.3.13/libmikmod/loaders/load_okt.c#L286github_commit
commit 097b69281fad (sezero/mikmod)
Fix landed in sezero/mikmod commit 097b69281fad — awaiting tagged release
https://github.com/sezero/mikmod/commit/097b69281fad6ba38a553569e6f55dbfdd71dc2aVendor Advisories for CVE-2026-105839(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× 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.
- 2026-10-07 17:59 UTCGHSA enrichment
- 2026-10-07 05:39 UTCGHSA enrichment
- 2026-10-06 17:19 UTCEG score recompute
- 2026-10-06 17:19 UTCGHSA enrichment
- 2026-10-06 16:22 UTCEG score recompute
- 2026-10-06 16:22 UTCGHSA enrichment
- 2026-10-06 14:30 UTCEG score recompute
- 2026-10-06 13:40 UTCEG score recompute
- 2026-10-06 13:39 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-105839?
CVE-2026-105839 is a high vulnerability published on October 6, 2026. libmikmod before 3.3.14 contains an integer overflow in the Oktalyzer loader OKT_doPBOD() that allows attackers to cause heap buffer overflow via crafted track counts. Attackers can supply an OKT module whose SLEN chunk wraps the 16-bit numtrk value, causing PBOD writes past allocated track…
When was CVE-2026-105839 disclosed?
CVE-2026-105839 was first published on October 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-105839?
CVE-2026-105839 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-105839?
An upstream fix for CVE-2026-105839 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-105839 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-105839
Is Your Infrastructure Affected by CVE-2026-105839?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.