CVE-2026-92842
Description
The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Affected 4 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Affected | — |
| forky | Affected | — |
| bookworm | Affected | — |
Alpine Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| v3.24 | Fixed | 8.3.35-r0 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-92842
- https://security.alpinelinux.org/vuln/CVE-2026-92842
- https://pkgs.alpinelinux.org/packages?name=php83
- https://pkgs.alpinelinux.org/packages?name=php84
- https://pkgs.alpinelinux.org/packages?name=php85
- https://github.com/php/php-src/security/advisories/GHSA-88hq-2827-7pg6
CWEs
CWE-122 CWE-125
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.