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Vulnerabilities

Vulnerability · CVE-2026-6100

Use-after-free (UAF) was possible in the , , and when a memory allocation fails with a and the decompression instance is re-used.

Published Apr 13, 2026 · catalog updated Aug 13, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2026-6100. EPSS is 0.76%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • 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.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.76%
Remediation
Not established
Affected products
See sources for product scope

Use-after-free (UAF) was possible in the , , and when a memory allocation fails with a and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a is raised during decompression. Using the helper functions to one-shot decompress data such as , , , and are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-6100

What to do

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

Should you patch?

No confirmed exploitation is on record for CVE-2026-6100. EPSS is 0.76%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free; CWE-787: Out-of-bounds Write; CWE-825. EPSS 0.76%. 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.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 13, 2026 · NIST NVD

    Detected

    Use-after-free (UAF) was possible in the , , and when a memory allocation fails with a and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even afte

  2. Aug 13, 2026 · NIST NVD

    Updated

    Use-after-free (UAF) was possible in the , , and when a memory allocation fails with a and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even afte

Sources

  • CVE.orgVulnerability recordCVE-2026-6100

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-6100

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2026-6100

    Use-after-free (UAF) was possible in the , , and when a memory allocation fails with a and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.