CVE-2018-6551

The malloc implementation in the GNU C Library (aka glibc or libc6), from version 2.24 to 2.26 on powerpc, and only in version 2.26 on i386, did not properly handle malloc calls with arguments close to SIZE_MAX and could return a pointer to a heap region that is smaller than requested, eventually leading to heap corruption.

• CWE-190
• CWE-787

• https://security.netapp.com/advisory/ntap-20190404-0003/
• https://sourceware.org/bugzilla/show_bug.cgi?id=22774Issue Tracking, Mailing List, Third Party Advisory
• https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=8e448310d74b283c5cd02b9ed7fb997b47bf9b22
• https://security.netapp.com/advisory/ntap-20190404-0003/
• https://sourceware.org/bugzilla/show_bug.cgi?id=22774Issue Tracking, Mailing List, Third Party Advisory
• https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=8e448310d74b283c5cd02b9ed7fb997b47bf9b22

Published

Feb 2, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-6544pdf_load_obj_stm in pdf/pdf-xref.c in Artifex MuPDF 1.12.0 c…
• CVE-2018-6545Ipswitch MoveIt v8.1 is vulnerable to a Stored Cross-Site Sc…
• CVE-2018-6546plays_service.exe in the plays.tv service before 1.27.7.0, a…
• CVE-2018-6547plays_service.exe in the plays.tv service before 1.27.7.0, a…
• CVE-2018-6548A use-after-free issue was discovered in libwebm through 201…
• CVE-2018-6550Monstra CMS through 3.0.4 has XSS in the title function in p…
• CVE-2018-6552Apport does not properly handle crashes originating from a P…
• CVE-2018-6553The CUPS AppArmor profile incorrectly confined the dnssd bac…
• CVE-2018-6554Memory leak in the irda_bind function in net/irda/af_irda.c …
• CVE-2018-6555The irda_setsockopt function in net/irda/af_irda.c and later…
• CVE-2018-6556lxc-user-nic when asked to delete a network interface will u…
• CVE-2018-6557The MOTD update script in the base-files package in Ubuntu 1…7