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CVE-2012-6656

iconvdata/ibm930.c in GNU C Library (aka glibc) before 2.16 allows context-dependent attackers to cause a denial of service (out-of-bounds read) via a multibyte character value of "0xffff" to the iconv function when converting IBM930 encoded data to UTF-8.

Severity
Medium 5.0
Published
5 Dec 2014
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
3.4% in the next 30 daysHigher than 89% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
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
  • Every version up to 2.16

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2012-6656
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2012-6656