CVE-2026-92842
published 2026-09-25CVE-2026-92842: The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is…
PriorityP431medium5.9CVSS 3.1
AVNACHPRNUINSUCHINAN
EPSS
0.22%
13.0th percentile
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.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | php8.4 | — | — |
| php | php | — | — |
| php_7.4 | php | — | — |
| php_8.2 | php | — | — |
| php_8.3 | php | — | — |
| php_8.4 | php | — | — |
| php_group | php | >= 8.2.* < 8.2.34 | 8.2.34 |
| php_group | php | >= 8.3.* < 8.3.35 | 8.3.35 |
| php_group | php | >= 8.4.* < 8.4.26 | 8.4.26 |
| php_group | php | >= 8.5.* < 8.5.11 | 8.5.11 |
| ubuntu | php5 | — | — |
| ubuntu | php7.0 | — | — |
| ubuntu | php7.2 | — | — |
| ubuntu | php7.4 | — | — |
| ubuntu | php8.1 | — | — |
| ubuntu | php8.3 | — | — |
| ubuntu | php8.5 | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat5.9MEDIUM
vendor_ubuntu3.4LOW
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
PHP vulnerabilities
vendor_ubuntu·2026-10-19·CVSS 3.4
CVE-2026-93682 [LOW] PHP vulnerabilities
Title: PHP vulnerabilities
Summary: Several security issues were fixed in PHP.
It was discovered that PHP did not properly validate the size of MySQL
server packets in the mysqlnd driver. A malicious server could possibly use
this issue to cause PHP to crash, resulting in a denial of service. This
issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, Ubuntu 26.04 LTS, and Ubuntu 26.10. (CVE-2025-1218)
It was discovered that PHP incorrectly handled response buffer sizes in the
SOAP HTTP client. A malicious server could possibly use this issue to cause
PHP to crash, resulting in a denial of service, or execute arbitrary code.
(CVE-2025-14181)
It was discovered that PHP incorrectly handled certain TAR archive headers
in the Phar extension. An attacker could pos
Red Hat
php: php: Information disclosure via out-of-bounds read in stream filters
vendor_redhat·2026-09-25·CVSS 5.9
CVE-2026-92842 [MEDIUM] CWE-125 php: php: Information disclosure via out-of-bounds read in stream filters
php: php: Information disclosure via out-of-bounds read in stream filters
A flaw was found in PHP. When processing certain conversion stream filters with line-break settings containing a null byte, the filter duplicates the string but retains the original length rather than the truncated size. An attacker who can influence filter options could exploit this out-of-bounds read, leading to information disclosure by leaking sensitive heap memory contents into the output stream.
Package: php (Red Hat Enterprise Linux 10) - Fix deferred
Package: php8.4 (Red Hat Enterprise Linux 10) - Fix deferred
Package: php (Red Hat Enterprise Linux 6) - Out of support scope
Package: php (Red Hat Enterprise Linux 7) - Fix deferred
Package: php:7.4/php (Red Hat Enterprise Linux 8) - Fix deferred
Package:
VulDB
PHP up to 8.2.33/8.3.34/8.4.25/8.5.10 Stream Filters pestrdup line-break-chars out-of-bounds
vuldb·2026-09-25·CVSS 5.9
CVE-2026-92842 [MEDIUM] PHP up to 8.2.33/8.3.34/8.4.25/8.5.10 Stream Filters pestrdup line-break-chars out-of-bounds
A vulnerability, which was classified as problematic, has been found in PHP up to 8.2.33/8.3.34/8.4.25/8.5.10. Impacted is the function pestrdup of the component Stream Filters. Performing a manipulation of the argument line-break-chars results in out-of-bounds read.
This vulnerability is identified as CVE-2026-92842. The attack can be initiated remotely. There is not any exploit available.
It is advisable to upgrade the affected component.
No detection rules found.
No public exploits indexed.
2026-09-25
Published