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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.27-1 | — |
| Debian 13 | glibc | 2.27-1 | — |
| Debian 12 | glibc | 2.27-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | glibc | 2.22-62.6.2 | SUSE-SU-2018:0451-1 |
| SLES 12 SP2 | glibc | 2.22-62.6.2 | SUSE-SU-2018:0451-1 |
| SLES 11 SP4 | glibc | 2.11.3-17.110.6.2 | SUSE-SU-2018:0565-1 |
| SLES 11 SP3 | glibc | 2.11.3-17.110.6.2 | SUSE-SU-2018:0565-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | glibc | 2.22-62.6.2 | SUSE-SU-2018:0451-1 |
| SLES for SAP 12 SP2 | glibc | 2.22-62.6.2 | SUSE-SU-2018:0451-1 |
| SLES for SAP 11 SP4 | glibc | 2.11.3-17.110.6.2 | SUSE-SU-2018:0565-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | glibc | 2.11.3-17.110.6.2 | SUSE-SU-2018:0565-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nscd +199 | 2.26-27.amzn2.0.4 | ALAS2-2018-992 |
Advisories 3
- SUSE-SU-2018:0451-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0565-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2018-992 Moderate: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 5, 2018