CVE-2018-11237
An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An AVX-512-optimized implementation of the mempcpy function in the GNU C Library (aka glibc or libc6) 2.27 and earlier may write data beyond the target buffer, leading to a buffer overflow in __mempcpy_avx512_no_vzeroupper.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.87% probability · 59th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- 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 · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 0.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/104256Broken Link
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Third 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=23196Issue Tracking, Patch, Third Party Advisory
- https://usn.ubuntu.com/4416-1/Third Party Advisory
- https://www.exploit-db.com/exploits/44750/Broken Link, Third Party Advisory, VDB Entry
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/104256Broken Link
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Third 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=23196Issue Tracking, Patch, Third Party Advisory
- https://usn.ubuntu.com/4416-1/Third Party Advisory
- https://www.exploit-db.com/exploits/44750/Broken Link, Third Party Advisory, VDB Entry
- 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.