CVE-2016-5771: debian debian_linux Use After Free
Vulnerability summary
CVE-2016-5771 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 15.48% chance of exploitation in the next 30 days, higher than 96.8% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 3Timeline
- 07-08-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
spl_array.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data.
CVSS metrics
4 scores · 2 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
15.48%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
No change 0.00 pp
From 15.48% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugs.php.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- debian_linuxEOL8.0
Php1 product
- php< 5.5.37 | ≥ 5.6.0, < 5.6.23 | ≥ 7.0.0, < 7.0.8
Ubuntu1 product
- php5< 5.5.9+dfsg-1ubuntu4.19
4 vendors · 5 products
References
15 links- github.com/php/php-src/commit/3f627e580acfdaf0595ae3b115b8bec677f203ee?w=1X Refsource CONFIRMPatchThird Party Advisory
- lists.apple.com/archives/security-announce/2016/Sep/msg00006.htmlVendor AdvisoryX Refsource APPLEBroken LinkMailing List
- lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-updates/2016-08/msg00003.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2016/06/23/4Mailing ListX Refsource MLISTPatchThird Party Advisory
Show all 15 references
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731X Refsource CONFIRMThird Party Advisory