Description
The file_check_mem function in funcs.c in file before 5.23, as used in the Fileinfo component in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.5, mishandles continuation-level jumps, which allows context-dependent attackers to cause a denial of service (buffer overflow and application crash) or possibly execute arbitrary code via a crafted magic file.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | file | 1:5.24-1 | — |
| Debian 13 | file | 1:5.24-1 | — |
| Debian 12 | file | 1:5.24-1 | — |
| Debian 8 | php5 | 5.6.20+dfsg-0+deb8u1 | DSA-3560-1 |
| Debian 7 | file | 5.11-2+deb7u9 | DLA-460-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u3 | DLA-499-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | file | 1:5.32-2ubuntu0.1 | USN-3686-1 |
| Ubuntu 16.04 LTS | file | 1:5.25-2ubuntu1.1 | USN-3686-1 |
| Ubuntu 16.04 LTS | php7.0 | 7.0.4-7ubuntu2.1 | USN-2984-1 |
| Ubuntu 14.04 LTS | file | 1:5.14-2ubuntu3.4 | USN-3686-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.16 | USN-2984-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-php56 +2 | 2.3-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php +27 | 5.6.25-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php-pear | 1:1.9.5-4.el6 | RHSA-2016:2750 |
Advisories 6
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-3686-1 file vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2984-1 php5, php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-499-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-460-1 file - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3560-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-2952-1 vendor-advisory
- https://github.com/file/file/commit/6713ca45e7757297381f4b4cdb9cf5e624a9ad36
- http://www.php.net/ChangeLog-7.php
- GLSA-201611-22 vendor-advisory
- 85802 vdb-entry
- https://support.apple.com/HT206567
- USN-3686-1 vendor-advisory
- RHSA-2016:2750 vendor-advisory
- DSA-3560 vendor-advisory
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=fe13566c93f118a15a96320a546c7878fd0cfc5e
- https://bugs.php.net/bug.php?id=71527
- USN-2952-2 vendor-advisory
- USN-3686-2 vendor-advisory
- APPLE-SA-2016-05-16-4 vendor-advisory
- http://www.php.net/ChangeLog-5.php
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- openSUSE-SU-2016:1167 vendor-advisory
- GLSA-201701-42 vendor-advisory
- [oss-security] 20160423 Re: CVE request: PHP issues fixed in 7.0.5, 5.6.20 and 5.5.34 releases mailing-list
- http://bugs.gw.com/view.php?id=522