SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2015-3798

The TRE library in Libc in Apple iOS before 8.4.1 and OS X before 10.10.5 allows context-dependent attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted regular expression, a different…

EXPLOIT ✓HIGH 7.5EPSS 13.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 13.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

The TRE library in Libc in Apple iOS before 8.4.1 and OS X before 10.10.5 allows context-dependent attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted regular expression, a different vulnerability than CVE-2015-3796 and CVE-2015-3797.

CVSS 2.0
7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
13.32% probability · 96th percentile
Public exploits
1 in Exploit-DB · verified · first 22 September 2015
CISA KEV
Not listed
Weakness
CWE-119
Affected
apple/iphone os · apple/mac os x
Source
product-security@apple.com
EPSS trend
0%8%15%4 November 2026: 13.32%4 November 20264 November 2026

EPSS 13.3% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-38262source ↗Apple Mac OSX Regex Engine (TRE) - Integer Signedness / Overflowosx · Google Security Researchdos22 September 2015yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.