Description
The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.
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 3 | kernel +8 | 2.4.21-32.0.1.EL | RHSA-2005:472 |
Advisories 1
- RHSA-2005:472 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- oval:org.mitre.oval:def:10672 vdb-entry signature
- oval:org.mitre.oval:def:1117 vdb-entry signature
- 19607 third-party-advisory
- RHSA-2005:472 vendor-advisory
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=126411
- [linux-kernel] 20040402 Re: disable-cap-mlock mailing-list
- 13769 vdb-entry