glibc: regular-expression match via proceed_next_node in posix/regexec.c leads to heap-based buffer over-read
Published Feb 26, 2019
9.8
CRITICALCVSS 3.1
EPSS 4.73%
Description
In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.
Affected products
No data.
Configuration 2
- n/a
- n/a
- n/a
Configuration 3
- ≥ 7.7.2.0 · < 7.7.2.21
- ≥ 7.8.2.0 · < 7.8.2.8
- ≥ 8.0.0 · < 8.1.1
Configuration 4
- 16.04
- 18.04
- 19.10
No data.
Red Hat Enterprise Linux 8
glibc-0:2.28-151.el8
Fixed · RHSA-2021:1585
Red Hat Enterprise Linux 8
glibc-0:2.28-151.el8
Fixed · RHSA-2021:1585
Red Hat Enterprise Linux 5
glibc
Will not fix
Red Hat Enterprise Linux 6
glibc
Will not fix
Red Hat Enterprise Linux 7
glibc
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | glibc-0:2.28-151.el8 | Fixed | RHSA-2021:1585 |
| Red Hat Enterprise Linux 8 | glibc-0:2.28-151.el8 | Fixed | RHSA-2021:1585 |
| Red Hat Enterprise Linux 5 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | glibc | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
As per upstream “resource exhaustion issues which can be triggered only with crafted patterns (either during compilation or execution) are not treated as security bugs”. The regular expression compiler in glibc is only supposed to be exposed to trusted content, therefore upstream does not consider this bug as a security vulnerability. (https://sourceware.org/glibc/wiki/Security%20Exceptions)
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
AV:N/AC:L/Au:N/C:P/I:P/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 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (36 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.73% (0.04731) | 91.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.73% (0.04731) | 90.66th | v5 (v2026.06.15) |
| May 29, 2026 | 4.95% (0.04945) | 89.79th | v4 (v2025.03.14) |
| May 26, 2026 | 7.08% (0.07080) | 91.62th | v4 (v2025.03.14) |
| May 24, 2026 | 4.95% (0.04945) | 89.75th | v4 (v2025.03.14) |
| May 22, 2026 | 7.08% (0.07080) | 91.62th | v4 (v2025.03.14) |
| May 13, 2026 | 4.95% (0.04945) | 89.72th | v4 (v2025.03.14) |
| Apr 14, 2026 | 7.08% (0.07080) | 91.53th | v4 (v2025.03.14) |
| Apr 12, 2026 | 12.13% (0.12135) | 93.82th | v4 (v2025.03.14) |
| Dec 28, 2025 | 13.73% (0.13732) | 94.04th | v4 (v2025.03.14) |
| Dec 27, 2025 | 8.46% (0.08460) | 92.07th | v4 (v2025.03.14) |
| Nov 21, 2025 | 13.96% (0.13955) | 94.05th | v4 (v2025.03.14) |
| Nov 18, 2025 | 17.80% (0.17799) | 94.63th | v4 (v2025.03.14) |
| Oct 28, 2025 | 13.96% (0.13955) | 94.01th | v4 (v2025.03.14) |
| Oct 27, 2025 | 8.61% (0.08608) | 92.04th | v4 (v2025.03.14) |
| Oct 2, 2025 | 13.96% (0.13955) | 94.12th | v4 (v2025.03.14) |
| Oct 1, 2025 | 10.03% (0.10030) | 92.82th | v4 (v2025.03.14) |
| Jul 30, 2025 | 8.61% (0.08608) | 92.03th | v4 (v2025.03.14) |
| Jul 13, 2025 | 10.03% (0.10030) | 92.70th | v4 (v2025.03.14) |
| Mar 30, 2025 | 11.07% (0.11071) | 92.82th | v4 (v2025.03.14) |
| Mar 29, 2025 | 32.50% (0.32499) | 95.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 11.34% (0.11336) | 93.01th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.47% (0.00468) | 76.36th | v3 (v2023.03.01) |
| Jul 19, 2024 | 0.34% (0.00342) | 71.80th | v3 (v2023.03.01) |
| Feb 20, 2024 | 0.38% (0.00377) | 72.11th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00406) | 73.09th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.41% (0.00406) | 70.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00290) | 64.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 17.17% (0.17166) | 93.10th | v2 (v2022.01.01) |
| Feb 3, 2022 | 9.45% (0.09448) | 86.95th | v1 |
| Jan 6, 2022 | 9.45% (0.09448) | 86.79th | v1 |
| Sep 1, 2021 | 2.27% (0.02273) | 77.89th | v1 |
| Apr 14, 2021 | 2.27% (0.02273) | 0.00th | v1 |
References (15)
- http://www.securityfocus.com/bid/107160 vdb-entryx_refsource_BIDBroken Link
- https://access.redhat.com/security/cve/CVE-2019-9169 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1684057 Issue Tracking
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140 x_refsource_MISCExploitMailing ListVendor Advisory
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142 x_refsource_MISCExploitMailing ListVendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-9169
- https://security.gentoo.org/glsa/202006-04 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190315-0002/ x_refsource_CONFIRMPatchThird Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=24114 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=583dd860d5b833037175247230a328f0050dbfe9 x_refsource_MISC
- https://support.f5.com/csp/article/K54823184 x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/4416-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-9169
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISCNot Applicable
Change history (0)
No recorded changes yet.