Description
dm-crypt in Linux kernel 2.6.15 and earlier does not clear a structure before it is freed, which leads to a memory disclosure that could allow local users to obtain sensitive information about a cryptographic key.
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 | 2.6.8-16sarge2 | DSA-1017-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | kernel +8 | 2.6.9-34.EL | RHSA-2006:0132 |
Advisories 2
- RHSA-2006:0132 Red Hat Security Advisory: Updated kernel packages available for Red Hat Enterprise Linux 4 Update 3 Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1017-1 kernel-source-2.6.8 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 388 third-party-advisory
- [linux-kernel] 20060104 [Patch 2.6] dm-crypt: Zero key material before free to avoid information leak mailing-list
- 19160 third-party-advisory
- MDKSA-2006:040 vendor-advisory
- 2006-0004 vendor-advisory
- 16301 vdb-entry
- RHSA-2006:0132 vendor-advisory
- 1015740 vdb-entry
- 18774 third-party-advisory
- [linux-kernel] 20060104 [Patch 2.6] dm-crypt: zero key before freeing it mailing-list
- FEDORA-2006-102 vendor-advisory
- SUSE-SA:2006:028 vendor-advisory
- FLSA:157459-4 vendor-advisory
- 22418 vdb-entry
- DSA-1017 vendor-advisory
- 20398 third-party-advisory
- kernel-dmcrypt-information-disclosure(24189) vdb-entry
- USN-244-1 vendor-advisory
- 18527 third-party-advisory
- ADV-2006-0235 vdb-entry
- 19374 third-party-advisory
- 18487 third-party-advisory
- oval:org.mitre.oval:def:11192 vdb-entry signature