Servers and applications
CVE-2017-17426
The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.
- Severity
- High 8.1
- Published
- 5 Dec 2017
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 1.6% in the next 30 daysHigher than 76% of CVEs. EPSS by FIRST, 11 Nov 2026
- Weakness
- Integer overflow (CWE-190)
- Attack
- Over the network · Only under certain conditions · No login needed · No user action needed
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
GNU C LibraryServers and applications · cpe:a:gnu:glibc |
|