Description
Linux kernel 2.4.x and 2.6.x up to 2.6.16 allows local users to bypass IPC permissions and modify a readonly attachment of shared memory by using mprotect to give write permission to the attachment. NOTE: some original raw sources combined this issue with CVE-2006-1524, but they are different bugs.
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 +8 | 2.6.9-42.0.3.EL | RHSA-2006:0689 |
| RHEL 3 | kernel +8 | 2.4.21-47.0.1.EL | RHSA-2006:0710 |
Advisories 2
- RHSA-2006:0710 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2006:0689 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- oval:org.mitre.oval:def:9978 vdb-entry signature
- ADV-2006-4502 vdb-entry
- linux-mprotect-security-bypass(26169) vdb-entry
- ADV-2006-1391 vdb-entry
- RHSA-2006:0579 vendor-advisory
- 20716 third-party-advisory
- 22875 third-party-advisory
- 22292 third-party-advisory
- RHSA-2006:0689 vendor-advisory
- http://www.vmware.com/download/esx/esx-202-200610-patch.html
- USN-302-1 vendor-advisory
- 20061113 VMSA-2006-0008 - VMware ESX Server 2.0.2 Upgrade Patch 2 mailing-list
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=190073
- 21035 third-party-advisory
- http://www.vmware.com/download/esx/esx-213-200610-patch.html
- RHSA-2006:0580 vendor-advisory
- 23064 third-party-advisory
- http://www.vmware.com/download/esx/esx-254-200610-patch.html
- http://support.avaya.com/elmodocs2/security/ASA-2006-249.htm
- http://support.avaya.com/elmodocs2/security/ASA-2006-254.htm
- 22497 third-party-advisory
- 20061113 VMSA-2006-0006 - VMware ESX Server 2.5.3 Upgrade Patch 4 mailing-list
- 25139 vdb-entry
- 22945 third-party-advisory
- RHSA-2006:0710 vendor-advisory
- 20061113 VMSA-2006-0007 - VMware ESX Server 2.1.3 Upgrade Patch 2 mailing-list
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b78b6af66a5fbaf17d7e6bfc32384df5e34408c8
- MDKSA-2006:086 vendor-advisory
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.6
- 20061113 VMSA-2006-0005 - VMware ESX Server 2.5.4 Upgrade Patch 1 mailing-list
- 20157 third-party-advisory