glibc: Missing unwind info in __startcontext causes infinite loop in _Unwind_Backtrace
Published Oct 7, 2016
7.5
HIGHCVSS 3.0
EPSS 3.84%
Description
The makecontext function in the GNU C Library (aka glibc or libc6) before 2.25 creates execution contexts incompatible with the unwinder on ARM EABI (32-bit) platforms, which might allow context-dependent attackers to cause a denial of service (hang), as demonstrated by applications compiled using gccgo, related to backtrace generation.
Affected products
No data.
Configuration 3
- 23
- 24
- 25
No data.
Red Hat Enterprise Linux 5
compat-glibc
Not affected
Red Hat Enterprise Linux 5
glibc
Not affected
Red Hat Enterprise Linux 6
compat-glibc
Not affected
Red Hat Enterprise Linux 6
glibc
Not affected
Red Hat Enterprise Linux 7
compat-glibc
Not affected
Red Hat Enterprise Linux 7
glibc
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 5 | glibc | Not affected | n/a |
| Red Hat Enterprise Linux 6 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 6 | glibc | Not affected | n/a |
| Red Hat Enterprise Linux 7 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 7 | glibc | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.84% (0.03841) | 89.79th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.77% (0.03768) | 88.48th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.13% (0.01133) | 76.39th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.23% (0.02228) | 74.13th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.13% (0.01133) | 76.87th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.49% (0.01494) | 87.40th | v3 (v2023.03.01) |
| Mar 19, 2024 | 1.49% (0.01494) | 86.56th | v3 (v2023.03.01) |
| Jan 8, 2024 | 1.06% (0.01058) | 82.45th | v3 (v2023.03.01) |
| Nov 30, 2023 | 0.92% (0.00920) | 81.11th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.82% (0.00816) | 79.79th | v3 (v2023.03.01) |
| Oct 20, 2023 | 0.85% (0.00853) | 80.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.65% (0.00649) | 76.19th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.74% (0.03740) | 85.11th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.74% (0.03740) | 83.58th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.74% (0.03740) | 66.74th | v2 (v2022.01.01) |
References (14)
- http://lists.opensuse.org/opensuse-updates/2016-10/msg00009.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2016/08/18/12 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/92532 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-6323 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1383297 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KTXSOVCRDGBIB4WCIDAGYYUBESXZ4IGK/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LVWSAZVBTLALXF4SCBPDV3FY6J22DXLZ/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WO7IMEYWZ2WTXGGMZBWWSDCUMFN63XOB/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2016-6323
- https://security.gentoo.org/glsa/201706-19 vendor-advisoryx_refsource_GENTOO
- https://sourceware.org/bugzilla/show_bug.cgi?id=20435 x_refsource_CONFIRMIssue Tracking
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=9e2ff6c9cc54c0b4402b8d49e4abe7000fde7617 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2016-6323
Change history (0)
No recorded changes yet.