CVE-2026-6103 Affecting php:7.4/php-odbc package, versions <0:7.4.33-8.module_el8.10.0+4321+cf5fd4bb


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-ALMALINUX8-PHP-21459645
  • published23 Oct 2026
  • disclosed21 Oct 2026

Introduced: 21 Oct 2026

NewCVE-2026-6103  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 php:7.4/php-odbc to version 0:7.4.33-8.module_el8.10.0+4321+cf5fd4bb or higher.
This issue was patched in ALSA-2026:87080.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php:7.4/php-odbc package and not the php:7.4/php-odbc package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

phar_tar_number() parses the octal size field of a TAR header into a uint32_t with no overflow check. The field is 11 octal digits wide and holds values up to 0x1FFFFFFFF, so a size above 0xFFFFFFFF silently wraps. The parser then skips the wrong number of data blocks and interprets attacker-controlled file content as the next TAR header, which lets a crafted archive inject entries that PharData reports and extracts as if they were genuine.

CVSS Base Scores

version 3.1