glibc: Integer overflow in stdlib/canonicalize.c on 32-bit architectures leading to stack-based buffer overflow
Published May 18, 2018
9.8
CRITICALCVSS 3.0
EPSS 7.05%
Description
stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.
Affected products
No data.
Configuration 2
- 4.0
- 7.0
- 7.0
- 7.0
Configuration 3
- 8.0.0
- 8.1.0
- 8.2.0
- 3.0.0
- 3.1.0
Configuration 4
- n/a
- n/a
No data.
Red Hat Enterprise Linux 7
glibc-0:2.17-260.el7
Fixed · RHSA-2018:3092
Red Hat Enterprise Linux 5
compat-glibc
Not affected
Red Hat Enterprise Linux 5
glibc
Will not fix
Red Hat Enterprise Linux 6
compat-glibc
Not affected
Red Hat Enterprise Linux 6
glibc
Will not fix
Red Hat Enterprise Linux 7
compat-glibc
Not affected
Red Hat Enterprise Linux 8
glibc
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | glibc-0:2.17-260.el7 | Fixed | RHSA-2018:3092 |
| Red Hat Enterprise Linux 5 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 5 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 6 | glibc | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 8 | glibc | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having moderate security impact and a future update may address this flaw.
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:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 1, 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 1, 2026 | 7.05% (0.07051) | 94.00th | v5 (v2026.06.15) |
| Sep 22, 2026 | 7.31% (0.07307) | 94.10th | v5 (v2026.06.15) |
| Sep 21, 2026 | 6.14% (0.06138) | 93.21th | v5 (v2026.06.15) |
| Sep 6, 2026 | 7.31% (0.07307) | 93.96th | v5 (v2026.06.15) |
| Sep 5, 2026 | 6.14% (0.06138) | 93.06th | v5 (v2026.06.15) |
| Aug 30, 2026 | 7.31% (0.07307) | 93.93th | v5 (v2026.06.15) |
| Aug 28, 2026 | 6.14% (0.06138) | 93.02th | v5 (v2026.06.15) |
| Aug 24, 2026 | 7.31% (0.07307) | 93.89th | v5 (v2026.06.15) |
| Aug 23, 2026 | 6.14% (0.06138) | 92.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.40% (0.07400) | 93.62th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.89% (0.00894) | 74.88th | v4 (v2025.03.14) |
| Nov 18, 2025 | 2.18% (0.02179) | 82.99th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.83% (0.00827) | 72.31th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.06% (0.04063) | 80.58th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.83% (0.00827) | 72.84th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.41% (0.01414) | 87.02th | v3 (v2023.03.01) |
| Apr 27, 2024 | 1.41% (0.01414) | 86.28th | v3 (v2023.03.01) |
| Mar 27, 2024 | 2.02% (0.02016) | 88.63th | v3 (v2023.03.01) |
| Mar 23, 2024 | 2.03% (0.02026) | 88.65th | v3 (v2023.03.01) |
| Nov 18, 2023 | 0.96% (0.00962) | 81.55th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.90% (0.00896) | 80.79th | v3 (v2023.03.01) |
| Oct 9, 2023 | 0.83% (0.00835) | 80.09th | v3 (v2023.03.01) |
| Aug 10, 2023 | 0.87% (0.00869) | 80.27th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.61% (0.00614) | 75.85th | v3 (v2023.03.01) |
| May 12, 2023 | 0.50% (0.00498) | 72.82th | v3 (v2023.03.01) |
| May 8, 2023 | 0.54% (0.00544) | 73.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.67% (0.00669) | 76.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.91% (0.03910) | 85.66th | v2 (v2022.01.01) |
| Feb 12, 2023 | 3.91% (0.03910) | 85.34th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.81% (0.03806) | 84.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.81% (0.03806) | 67.27th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.59% (0.03590) | 68.40th | v1 |
| Jan 6, 2022 | 3.59% (0.03590) | 68.10th | v1 |
| Sep 26, 2021 | 3.59% (0.03590) | 82.17th | v1 |
| Sep 1, 2021 | 14.31% (0.14314) | 96.76th | v1 |
| Apr 14, 2021 | 14.31% (0.14314) | 0.00th | v1 |
References (13)
- http://www.securityfocus.com/bid/104255 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092 vendor-advisoryx_refsource_REDHATPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-11236 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1581269 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-11236
- https://security.netapp.com/advisory/ntap-20190329-0001/ x_refsource_CONFIRMBroken Link
- https://security.netapp.com/advisory/ntap-20190401-0001/ x_refsource_CONFIRMThird Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=22786 x_refsource_MISCIssue TrackingThird Party Advisory
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=5460617d1567657621107d895ee2dd83bc1f88f2 x_refsource_MISC
- https://usn.ubuntu.com/4416-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-11236
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.