| Name | CVE-2018-6551 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | ELA-724-1, ELA-725-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glibc (PTS) | jessie, jessie (lts) | 2.19-18+deb8u14 | fixed |
| stretch (security) | 2.24-11+deb9u1 | vulnerable |
| stretch (lts), stretch | 2.24-11+deb9u7 | fixed |
| buster (security), buster, buster (lts) | 2.28-10+deb10u4 | fixed |
| bullseye | 2.31-13+deb11u11 | fixed |
| bullseye (security) | 2.31-13+deb11u10 | fixed |
| bookworm | 2.36-9+deb12u9 | fixed |
| bookworm (security) | 2.36-9+deb12u7 | fixed |
| sid, trixie | 2.40-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| eglibc | source | (unstable) | (not affected) | | | |
| glibc | source | experimental | 2.26.9000+20180127.7e23a7dd-0experimental0 | | | |
| glibc | source | jessie | 2.19-18+deb8u11 | | ELA-725-1 | |
| glibc | source | stretch | 2.24-11+deb9u5 | | ELA-724-1 | |
| glibc | source | (unstable) | 2.27-1 | | | |
Notes
- eglibc <not-affected> (Issue introduced in 2.24 for powerpc, 2.26 only for i386)
https://sourceware.org/bugzilla/show_bug.cgi?id=22774
Fixed by: https://sourceware.org/git/?p=glibc.git;a=commit;h=8e448310d74b283c5cd02b9ed7fb997b47bf9b22