Description
The dbg_lvl file for the megaraid_sas driver in the Linux kernel before 2.6.27 has world-writable permissions, which allows local users to change the (1) behavior and (2) logging level of the driver by modifying this file.
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 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.9etch3 | DSA-2005-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +11 | 2.6.18-164.11.1.el5 | RHSA-2010:0046 |
| RHEL 4 | kernel +10 | 2.6.9-89.0.20.EL | RHSA-2010:0076 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-139.el5rt | RHSA-2009:1635 |
Advisories 4
- RHSA-2010:0046 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0076 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2009:1635 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2005-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- SUSE-SA:2009:061 vendor-advisory
- USN-864-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=526068
- [oss-security] 20091113 Re: CVE request: kernel: bad permissions on megaraid_sas sysfs files mailing-list
- 37019 vdb-entry
- http://support.avaya.com/css/P8/documents/100073666
- 37909 third-party-advisory
- 60202 vdb-entry
- oval:org.mitre.oval:def:11018 vdb-entry signature
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=66dca9b8c50b5e59d3bea8b21cee5c6dae6c9c46
- SUSE-SA:2009:064 vendor-advisory
- [oss-security] 20091113 CVE request: kernel: bad permissions on megaraid_sas sysfs files mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27
- SUSE-SA:2010:013 vendor-advisory
- RHSA-2010:0095 vendor-advisory
- oval:org.mitre.oval:def:7163 vdb-entry signature
- RHSA-2010:0046 vendor-advisory
- DSA-2005 vendor-advisory