Description
The Linux Kernel before 2.6.15.5 allows local users to cause a denial of service (NFS client panic) via unknown attack vectors related to the use of O_DIRECT (direct I/O).
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 3.1 | kernel-source-2.6.8 | 2.6.8-16sarge3 | DSA-1103 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +8 | 2.6.9-34.0.1.EL | RHSA-2006:0493 |
Advisories 2
- RHSA-2006:0493 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1103 kernel-source-2.6.8 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2006-131 vendor-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-161.htm
- RHSA-2006:0493 vendor-advisory
- ADV-2006-2554 vdb-entry
- 19220 third-party-advisory
- 21745 third-party-advisory
- kernel-odirect-dos(25000) vdb-entry
- ADV-2006-0804 vdb-entry
- SUSE-SA:2006:028 vendor-advisory
- DSA-1103 vendor-advisory
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.15.5
- 20237 third-party-advisory
- 20398 third-party-advisory
- oval:org.mitre.oval:def:9932 vdb-entry signature
- MDKSA-2006:059 vendor-advisory
- 19083 third-party-advisory
- 16922 vdb-entry
- 19108 third-party-advisory
- USN-263-1 vendor-advisory
- 20914 third-party-advisory