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CVE-2014-6040

GNU C Library (aka glibc) before 2.20 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via a multibyte character value of "0xffff" to the iconv function when converting (1) IBM933, (2) IBM935, (3) IBM937, (4) IBM939, or (5) IBM1364 encoded data to UTF-8.

Severity
Medium 5.0
Published
5 Dec 2014
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
6.6% in the next 30 daysHigher than 93% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
GNU C LibraryServers and applications · cpe:a:gnu:glibc
  • Version 2.18
  • Version 2.17
  • Version 2.16
  • Version 2.15
All 29 release lines
  • Every version up to 2.19
  • Version 2.0
  • Version 2.0.1
  • Version 2.0.2
  • Version 2.0.3
  • Version 2.0.4
  • Version 2.0.5
  • Version 2.0.6
  • Version 2.1
  • Version 2.1.1
  • Version 2.1.1.6
  • Version 2.1.2
  • Version 2.1.3
  • Version 2.1.9
  • Version 2.10.1
  • Version 2.11
  • Version 2.11.1
  • Version 2.11.2
  • Version 2.11.3
  • Version 2.12
  • Version 2.12.1
  • Version 2.12.2
  • Version 2.13
  • Version 2.14
  • Version 2.14.1
  • Version 2.15
  • Version 2.16
  • Version 2.17
  • Version 2.18

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-6040
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-6040