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Fencer Intel
critical 9.1

CVE-2015-8776 json

The strftime function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service…

published 2016-04-19 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-8648

cvss
9.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.8%
EPSS 4.8% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The strftime function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (application crash) or possibly obtain sensitive information via an out-of-range time value.

Patch / fix

  • glibc Debian 14, Debian 13, Debian 12 2.21-7

debian advisories DEBIAN-CVE-2015-8776

  • eglibc Ubuntu 14.04 LTS 2.19-0ubuntu6.8

ubuntu advisories UBUNTU-CVE-2015-8776

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

  • glibc RHEL 7 2.17-196.el7
  • nscd RHEL 7 2.17-196.el7
  • glibc-utils RHEL 7 2.17-196.el7
  • glibc-common RHEL 7 2.17-196.el7
  • glibc-debuginfo-common RHEL 7 2.17-196.el7
  • glibc RHEL 6 2.12-1.209.el6
  • nscd RHEL 6 2.12-1.209.el6
  • glibc-utils RHEL 6 2.12-1.209.el6

red hat advisories RHSA-2017:1916RHSA-2017:0680

  • glibc SLES for SAP 11 SP4, SLES for SAP 11 SP3, SLES 11 SP4 +6 more 2.11.3-17.95.2
  • glibc SLES for SAP 12, SLES 12, SLED 12 +1 more 2.19-22.13.1
  • glibc SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +1 more 2.19-35.1
  • glibc SLES 11 SP2-LTSS 2.11.3-17.45.66.1

suse advisories SUSE-SU-2016:0472-1SUSE-SU-2016:0470-1SUSE-SU-2016:0473-1SUSE-SU-2016:0471-1

  • glibc openSUSE Tumbleweed 2.24-2.3

opensuse advisories openSUSE-SU-2024:10154-1

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-2015-8776 updated cvss 6.5

glibc: Segmentation fault caused by passing out-of-range data to strftime()

  • Red Hat Enterprise Linux 5 glibc, compat-glibc Red Hat Enterprise Linux 6 compat-glibc Red Hat Enterprise Linux 7 compat-glibc
    affected: workaround, no fix planned “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.”
  • Red Hat Enterprise Linux Client (v. 7) nscd 2.17-196.el7, glibc 2.17-196.el7, glibc-utils 2.17-196.el7, glibc-common 2.17-196.el7, glibc-debuginfo-common 2.17-196.el7 Red Hat Enterprise Linux Client Optional (v. 7) glibc-debuginfo-common 2.17-196.el7 Red Hat Enterprise Linux ComputeNode (v. 7) nscd 2.17-196.el7, glibc 2.17-196.el7, glibc-utils 2.17-196.el7, glibc-common 2.17-196.el7, glibc-debuginfo-common 2.17-196.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) glibc-debuginfo-common 2.17-196.el7
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:1916
  • Red Hat Enterprise Linux Desktop (v. 6) nscd 2.12-1.209.el6, glibc 2.12-1.209.el6, glibc-utils 2.12-1.209.el6, glibc-common 2.12-1.209.el6, glibc-debuginfo-common 2.12-1.209.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) glibc-debuginfo-common 2.12-1.209.el6 Red Hat Enterprise Linux HPC Node (v. 6) nscd 2.12-1.209.el6, glibc 2.12-1.209.el6, glibc-utils 2.12-1.209.el6, glibc-common 2.12-1.209.el6, glibc-debuginfo-common 2.12-1.209.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) glibc-debuginfo-common 2.12-1.209.el6 Red Hat Enterprise Linux Server (v. 6) nscd 2.12-1.209.el6, glibc 2.12-1.209.el6, glibc-utils 2.12-1.209.el6, glibc-common 2.12-1.209.el6, glibc-debuginfo-common 2.12-1.209.el6
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:0680
  • Red Hat Enterprise Linux Server (v. 7) nscd 2.17-196.el7, glibc 2.17-196.el7, glibc-utils 2.17-196.el7, glibc-common 2.17-196.el7, glibc-debuginfo-common 2.17-196.el7
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:1916
  • Red Hat Enterprise Linux Server Optional (v. 6) glibc-debuginfo-common 2.12-1.209.el6
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:0680
  • Red Hat Enterprise Linux Server Optional (v. 7) glibc-debuginfo-common 2.17-196.el7
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:1916
  • Red Hat Enterprise Linux Workstation (v. 6) nscd 2.12-1.209.el6, glibc 2.12-1.209.el6, glibc-utils 2.12-1.209.el6, glibc-common 2.12-1.209.el6, glibc-debuginfo-common 2.12-1.209.el6
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:0680
  • Red Hat Enterprise Linux Workstation (v. 7) nscd 2.17-196.el7, glibc 2.17-196.el7, glibc-utils 2.17-196.el7, glibc-common 2.17-196.el7, glibc-debuginfo-common 2.17-196.el7
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:1916
show 2 more
  • Red Hat Enterprise Linux Workstation Optional (v. 6) glibc-debuginfo-common 2.12-1.209.el6
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:0680
  • Red Hat Enterprise Linux Workstation Optional (v. 7) glibc-debuginfo-common 2.17-196.el7
    fixed: vendor fix “Check time values before they are passed to strftime, or call strftime only with struct tm values computed by gmtime or localtime.” RHSA-2017:1916

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

4.80% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:N/A:P

Classification

Weakness

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.