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CVE-2026-40317

NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 12 (JumpToUser) accepts an arbitrary entry point address from user-space registers without validation, allowing any Ring 3 user-mode process to jump to kernel addresses and execute arbitrary code in Ring 0 context, resulting in local privilege escalation. This issue has been fixed in version 0.24. If developers are unable to immediately update, they should restrict syscall access by ru
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:89f2d218f647eda5ef112bfb93491f68c24df7de12d77ab9e6d9ef6cc7c05616
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"NovumOS","vendor":"MinecAnton209","versions":[{"status":"affected","version":"< 0.24"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":9.4,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24","tags":["x_refsource_MISC"],"url":"https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/adp/0/references/0
{"name":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:25c2ce4ccb144c7aef06109454a9a82a0f66fc855a333c1b7bd6713dd5d29bb1 · sha256:979527eb014beb02… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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