CVE-2018-11236
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 6.92% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-787
- Affected
- gnu/glibc · redhat/virtualization host · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation · oracle/communications session border controller · oracle/enterprise communications broker · netapp/data ontap edge · netapp/element software management
- Source
- cve@mitre.org
EPSS moved from 6.1% on 21 September 2026 to 6.9% on 27 October 2026, peaking at 7.3% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/104255Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190329-0001/Broken Link
- https://security.netapp.com/advisory/ntap-20190401-0001/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=22786Issue Tracking, Third Party Advisory
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=5460617d1567657621107d895ee2dd83bc1f88f2
- https://usn.ubuntu.com/4416-1/
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/104255Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190329-0001/Broken Link
- https://security.netapp.com/advisory/ntap-20190401-0001/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=22786Issue Tracking, Third Party Advisory
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=5460617d1567657621107d895ee2dd83bc1f88f2
- https://usn.ubuntu.com/4416-1/
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.