Description
The shmctl function in Linux 2.6.9 and earlier allows local users to unlock the memory of other processes, which could cause sensitive memory to be swapped to disk, which could allow it to be read by other users once it has been released.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +6 | 2.6.9-5.0.3.EL | RHSA-2005:092 |
| RHEL 3 | kernel +8 | 2.4.21-32.0.1.EL | RHSA-2005:472 |
Advisories 2
- RHSA-2005:472 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2005:092 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 19607 third-party-advisory
- RHSA-2005:472 vendor-advisory
- 12598 vdb-entry
- RHSA-2005:092 vendor-advisory
- 20050215 [USN-82-1] Linux kernel vulnerabilities mailing-list
- CLA-2005:930 vendor-advisory
- oval:org.mitre.oval:def:8778 vdb-entry signature
- oval:org.mitre.oval:def:1225 vdb-entry signature