Description
Heap-based buffer overflow in the parse_tag_3_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to a large encrypted key size in a Tag 3 packet.
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 5.0 | linux-2.6 | 2.6.26-17lenny1 | DSA-1845-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.8etch2 | DSA-1844-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-128.4.1.el5 | RHSA-2009:1193 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5.3 EUS | kernel +12 | 2.6.18-128.4.1.el5 | RHSA-2009:1193 |
Advisories 3
- RHSA-2009:1193 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-1844-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1845-1 linux-2.6 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 35985 third-party-advisory
- 36131 third-party-advisory
- 37471 third-party-advisory
- FEDORA-2009-8144 vendor-advisory
- DSA-1844 vendor-advisory
- USN-807-1 vendor-advisory
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- RHSA-2009:1193 vendor-advisory
- 20090728 [RISE-2009003] Linux eCryptfs parse_tag_3_packet Encrypted Key Buffer Overflow Vulnerability mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.4
- SUSE-SR:2009:015 vendor-advisory
- FEDORA-2009-8264 vendor-advisory
- 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components mailing-list
- 36051 third-party-advisory
- 35850 vdb-entry
- oval:org.mitre.oval:def:11255 vdb-entry signature
- 36045 third-party-advisory
- 36116 third-party-advisory
- oval:org.mitre.oval:def:8057 vdb-entry signature
- 36054 third-party-advisory
- ADV-2009-2041 vdb-entry
- DSA-1845 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f151cd2c54ddc7714e2f740681350476cda03a28
- ADV-2009-3316 vdb-entry
- http://risesecurity.org/advisories/RISE-2009003.txt