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Vulnerabilities

Vulnerability · OSV-2026-564

Use-of-uninitialized-value in DoTestOneInput

Published Apr 12, 2026 · catalog updated Oct 27, 2026 · Use-of-uninitialized-value in DoTestOneInput

Last checked Oct 28, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for OSV-2026-564. A missing EPSS score is not a low risk. Compare Use-of-uninitialized-value in DoTestOneInput 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 (Use-of-uninitialized-value in DoTestOneInput).
  • 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 libjxl

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=501356662

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 libjxlefd4c04dc1c4 → ec2982b1f79e (github.com/libjxl/libjxl)

How to fix OSV-2026-564

  • Upgrade

    OSV-2026-564 lists a fix boundary at ec2982b1f79e. Compare the installed build with that boundary 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-2026-564. A missing EPSS score is not a low risk. Compare Use-of-uninitialized-value in DoTestOneInput with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with efd4c04dc1c4 → ec2982b1f79e (github.com/libjxl/libjxl). 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 12, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=501356662

  2. Oct 27, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libjxl fixed in ec2982b1f79e

  3. Oct 27, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libjxl fixed in ec2982b1f79e (github.com/libjxl/libjxl)

  4. Oct 27, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=501356662

Sources

References

Freshness

Last verified in this catalog Oct 27, 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 28, 2026