CVE-2011-3638

Published: 28 October 2011

fs/ext4/extents.c in the Linux kernel before 3.0 does not mark a modified extent as dirty in certain cases of extent splitting, which allows local users to cause a denial of service (system crash) via vectors involving ext4 umount and mount operations.

From the Ubuntu Security Team

Zheng Liu discovered a flaw in how the ext4 filesystem splits extents. A local unprivileged attacker could exploit this to crash the system, leading to a denial of service.

Notes

Author	Note
tyhicks	Introduced by 56055d3ae4cc7fa6d2b10885f20269de8a989ed7

Priority

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	hardy	Ignored (was deferred [massive patch that requires significant backport effort] now end-of-life)
	lucid	Released (2.6.32-37.81)
	maverick	Ignored (reached end-of-life)
	natty	Ignored (was deferred [massive patch that requires significant backport effort] now end-of-life)
	oneiric	Not vulnerable (3.0-0.1)
	precise	Not vulnerable (3.1.0-1.1)
	quantal	Not vulnerable (3.4.0-1.1)
	raring	Not vulnerable (3.7.0-0.5)
	saucy	Not vulnerable (3.9.0-0.2)
	trusty	Not vulnerable (3.11.0-12.19)
	upstream	Released (3.0~rc1)
	Patches: Introduced by 56055d3ae4cc7fa6d2b10885f20269de8a989ed7 Fixed by 667eff35a1f56fa74ce98a0c7c29a40adc1ba4e3
linux-armadaxp Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Not vulnerable (3.2.0-1600.1)
	quantal	Not vulnerable (3.2.0-1602.5)
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-ec2 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-341.42)
	maverick	Ignored (binary supplied by "linux" now)
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-flo Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Does not exist
	trusty	Does not exist (trusty was not-affected [3.4.0-1.3])
	upstream	Released (3.0~rc1)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Ignored (reached end-of-life)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-goldfish Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Ignored
	trusty	Does not exist (trusty was not-affected [3.4.0-1.9])
	upstream	Released (3.0~rc1)
linux-grouper Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Ignored
	trusty	Does not exist (trusty was not-affected [3.1.10-8.28])
	upstream	Released (3.0~rc1)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Ignored (reached end-of-life)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Ignored (reached end-of-life)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-backport-oneiric Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (3.0.0-5.6~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-quantal Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	oneiric	Does not exist
	precise	Not vulnerable (3.5.0-18.29~precise1)
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-raring Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	oneiric	Does not exist
	precise	Not vulnerable (3.8.0-19.30~precise1)
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-saucy Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Not vulnerable (3.11.0-13.20~precise2)
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-lts-trusty Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Not vulnerable (3.13.0-24.46~precise1)
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-maguro Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Ignored
	trusty	Does not exist (trusty was not-affected [3.0.0-3.18])
	upstream	Released (3.0~rc1)
linux-mako Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Ignored
	trusty	Does not exist (trusty was not-affected [3.4.0-3.21])
	upstream	Released (3.0~rc1)
linux-manta Launchpad, Ubuntu, Debian	lucid	Does not exist
	precise	Does not exist
	quantal	Does not exist
	saucy	Ignored
	trusty	Does not exist (trusty was not-affected [3.4.0-4.19])
	upstream	Released (3.0~rc1)
linux-mvl-dove Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Ignored (reached end-of-life)
	maverick	Ignored (reached end-of-life)
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	raring	Does not exist
	saucy	Does not exist
	trusty	Does not exist
	upstream	Released (3.0~rc1)
linux-ti-omap4 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	maverick	Ignored (reached end-of-life)
	natty	Ignored (was deferred [massive patch that requires significant backport effort] now end-of-life)
	oneiric	Not vulnerable (3.0.0-1200.1)
	precise	Not vulnerable (3.0.0-1401.2)
	quantal	Not vulnerable
	raring	Not vulnerable
	saucy	Not vulnerable (3.5.0-223.34)
	trusty	Does not exist
	upstream	Released (3.0~rc1)

References

Bugs

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›