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Vulnerabilities

Vulnerability · OSV-2025-266

Heap-buffer-overflow in lj_buf_ruleb128

Published Apr 8, 2025 · catalog updated Oct 23, 2026 · Heap-buffer-overflow in lj_buf_ruleb128

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for OSV-2025-266. A missing EPSS score is not a low risk. Compare Heap-buffer-overflow in lj_buf_ruleb128 with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Heap-buffer-overflow in lj_buf_ruleb128).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
OSS-Fuzz tarantool

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=408513931

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • OSS-Fuzz tarantoolfrom 8ad443de995a (github.com/tarantool/tarantool)

How to fix OSV-2025-266

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for OSV-2025-266. A missing EPSS score is not a low risk. Compare Heap-buffer-overflow in lj_buf_ruleb128 with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with from 8ad443de995a (github.com/tarantool/tarantool). Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 8, 2025 · OpenSSF OSV / OSV Scanner

    Detected

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=408513931

  2. Oct 23, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=408513931

Sources

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • OpenSSF OSV / OSV ScannerOct 24, 2026