ZDF
Sign inSign up

Vulnerabilities

Vulnerability · OSV-2021-1199

Heap-use-after-free in i_zval_ptr_dtor

Published Sep 4, 2021 · catalog updated Oct 20, 2026 · Heap-use-after-free in i_zval_ptr_dtor

Open the advisory

Exploitation likelihood is not on this record for OSV-2021-1199. A missing EPSS score is not a low risk. Compare Heap-use-after-free in i_zval_ptr_dtor 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-use-after-free in i_zval_ptr_dtor).
  • 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 php

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38001

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 php1902f730ee2b → 24ff7eee3f04 (github.com/php/php-src)

How to fix OSV-2021-1199

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-2021-1199. A missing EPSS score is not a low risk. Compare Heap-use-after-free in i_zval_ptr_dtor with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 1902f730ee2b → 24ff7eee3f04 (github.com/php/php-src). 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. Sep 4, 2021 · OpenSSF OSV / OSV Scanner

    Detected

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38001

  2. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    php fixed in 24ff7eee3f04

  3. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    php fixed in 24ff7eee3f04 (github.com/php/php-src)

  4. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38001

Sources

References

Freshness

Last verified in this catalog Oct 20, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.