An integer overflow in the implementation of the posix_memalign in memalign functions in the GNU C Library (aka glibc or libc6) 2.26 and earlier could cause these functions to return a pointer to a heap area that is too small, potentially leading to heap corruption.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-6485 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of glibc and compat-glibc as shipped with Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
| CVSS3 Base Score | 5.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | Low |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (glibc) | RHSA-2018:3092 | 2018-10-30 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | compat-glibc | Will not fix |
| Red Hat Enterprise Linux 6 | compat-glibc | Will not fix |
| Red Hat Enterprise Linux 6 | glibc | Will not fix |
| Red Hat Enterprise Linux 5 | compat-glibc | Will not fix |
| Red Hat Enterprise Linux 5 | glibc | Will not fix |
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