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Fencer Intel
critical 9.8

CVE-2016-6293 json

The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not e…

published 2016-07-25 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-7223

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that there is a '\0' character at the end of a certain temporary array, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a call with a long httpAcceptLanguage argument.

Patch / fix

  • icu Debian 14, Debian 13, Debian 12 57.1-4

debian advisories DEBIAN-CVE-2016-6293

  • icu Ubuntu 14.04 LTS 52.1-3ubuntu0.5
  • icu Ubuntu 16.04 LTS 55.1-7ubuntu0.1

ubuntu advisories UBUNTU-CVE-2016-6293

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • icu SLES 12 SP3, SLES 12 SP2-BCL, SLED 12 SP3 +10 more 52.1-8.7.1
  • icu SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.0-47.6.1

suse advisories SUSE-SU-2018:1401-2SUSE-SU-2018:1602-1SUSE-SU-2018:1401-1

  • icu Alpine 3.24, Alpine 3.23, Alpine 3.22 +18 more 57.1-r1

alpine advisories ALPINE-CVE-2016-6293

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-6293 updated cvss 3.3

icu: Out-of-bounds access in uloc_acceptLanguageFromHTTP

  • Red Hat Directory Server 8 icu Red Hat Enterprise Linux 5 icu Red Hat Enterprise Linux 6 icu, libicu Red Hat Enterprise Linux 7 icu, libicu Red Hat OpenShift Enterprise 2 icu
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

5.02% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.php.net https://bugs.php.net/72533 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.