Description
Buffer underflow in the ibwdt_ioctl function in drivers/watchdog/ib700wdt.c in the Linux kernel before 2.6.28-rc1 might allow local users to have an unknown impact via a certain /dev/watchdog WDIOC_SETTIMEOUT IOCTL call.
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 | fai-kernels | 1.17+etch.24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.8etch1 | DSA-1787-1 |
| Debian 4.0 | user-mode-linux | 2.6.18-1um-2etch.24etch2 | DSA-1794-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +10 | 2.6.9-78.0.13.EL | RHSA-2009:0014 |
Advisories 3
- RHSA-2009:0014 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1787-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1794-1 linux-2.6 - multiple vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 35390 third-party-advisory
- [oss-security] 20081217 Re: CVE request: kernel: watchdog: ib700wdt.c - buffer_underflow bug mailing-list
- [oss-security] 20081216 Re: CVE request: kernel: watchdog: ib700wdt.c - buffer_underflow bug mailing-list
- 33706 third-party-advisory
- oval:org.mitre.oval:def:11344 vdb-entry signature
- SUSE-SA:2009:010 vendor-advisory
- 33756 third-party-advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.28-rc1
- [linux-kernel] 20081005 [PATCH 04/19] ib700wdt: Fix off by one mailing-list
- DSA-1794 vendor-advisory
- SUSE-SA:2009:030 vendor-advisory
- RHSA-2009:0014 vendor-advisory
- 35011 third-party-advisory
- linux-kernel-ibwdtioctl-unknown(47667) vdb-entry
- 33556 third-party-advisory
- http://bugzilla.kernel.org/show_bug.cgi?id=11399
- http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git%3Ba=commit%3Bh=7c2500f17d65092d93345f3996cf82ebca17e9ff
- 34981 third-party-advisory
- USN-714-1 vendor-advisory
- DSA-1787 vendor-advisory
- USN-715-1 vendor-advisory
- [oss-security] 20081217 Re: CVE request: kernel: watchdog: ib700wdt.c - buffer_underflow bug mailing-list
- [oss-security] 20081210 CVE request: kernel: watchdog: ib700wdt.c - buffer_underflow bug mailing-list