Description
The lcd_write function in drivers/usb/misc/usblcd.c in the Linux kernel before 2.6.22-rc7 does not limit the amount of memory used by a caller, which allows local users to cause a denial of service (memory consumption).
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 | 2.6.18.dfsg.1-13etch1 | DSA-1356-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +9 | 2.6.18-8.1.15.el5 | RHSA-2007:0940 |
Advisories 2
- RHSA-2007:0940 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1356-1 linux-2.6 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- RHSA-2007:0940 vendor-advisory
- 37116 vdb-entry
- 27212 third-party-advisory
- 27227 third-party-advisory
- 26664 third-party-advisory
- 26643 third-party-advisory
- SUSE-SA:2007:051 vendor-advisory
- SUSE-SA:2007:053 vendor-advisory
- 27322 third-party-advisory
- kernel-lcdwrite-dos(35302) vdb-entry
- USN-510-1 vendor-advisory
- DSA-1356 vendor-advisory
- USN-509-1 vendor-advisory
- 24734 vdb-entry
- USN-489-1 vendor-advisory
- MDKSA-2007:196 vendor-advisory
- 25895 third-party-advisory
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.22-rc7
- oval:org.mitre.oval:def:9883 vdb-entry signature
- 26450 third-party-advisory
- ADV-2007-2403 vdb-entry
- 26139 third-party-advisory
- MDKSA-2007:195 vendor-advisory