CVE-2007-3732

Published: 7 November 2019

In Linux 2.6 before 2.6.23, the TRACE_IRQS_ON function in iret_exc calls a C function without ensuring that the segments are set properly. The kernel's %fs needs to be restored before the call in TRACE_IRQS_ON and before enabling interrupts, so that "current" references work. Without this, "current" used in the window between iret_exc and the middle of error_code where %fs is reset, would crash.

Notes

Author	Note
jdstrand	android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support

Author

Note

jdstrand

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Priority

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Not vulnerable (3.1.0-1.1)
	trusty	Not vulnerable (3.11.0-12.19)
	wily	Not vulnerable (3.19.0-15.15)
	xenial	Not vulnerable (4.2.0-16.19)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by a10d9a71bafd3a283da240d2868e71346d2aef6f
linux-armadaxp Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Not vulnerable (3.2.0-1600.1)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-linaro-omap Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-linaro-shared Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-linaro-vexpress Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-lts-quantal Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-qcm-msm Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-ti-omap4 Launchpad, Ubuntu, Debian	upstream	Released (2.6.23~rc1)
	precise	Not vulnerable (3.0.0-1401.2)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
linux-goldfish Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.4.0-3.14])
	wily	Not vulnerable (3.4.0-3.14)
	xenial	Not vulnerable (3.4.0-4.27)
	upstream	Released (2.6.23~rc1)
linux-grouper Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	wily	Does not exist
	xenial	Does not exist
	upstream	Released (2.6.23~rc1)
linux-lts-raring Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	wily	Does not exist
	xenial	Does not exist
	upstream	Released (2.6.23~rc1)
linux-flo Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.4.0-3.10])
	upstream	Released (2.6.23~rc1)
	wily	Not vulnerable (3.4.0-3.10)
	xenial	Not vulnerable (3.4.0-5.22)
linux-lts-saucy Launchpad, Ubuntu, Debian	precise	Ignored (end of life)
	trusty	Does not exist
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
	This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty Launchpad, Ubuntu, Debian	precise	Not vulnerable (3.13.0-24.46~precise1)
	trusty	Does not exist
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-lts-utopic Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.16.0-25.33~14.04.2])
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-lts-vivid Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.19.0-18.18~14.04.1])
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-lts-wily Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [4.2.0-18.22~14.04.1])
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Not vulnerable (4.4.0-13.29~14.04.1)
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-maguro Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was ignored)
	upstream	Released (2.6.23~rc1)
	wily	Does not exist
	xenial	Does not exist
linux-mako Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.4.0-3.14])
	upstream	Released (2.6.23~rc1)
	wily	Not vulnerable (3.4.0-5.28)
	xenial	Not vulnerable (3.4.0-7.40)
linux-manta Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist (trusty was not-affected [3.4.0-6.25])
	upstream	Released (2.6.23~rc1)
	wily	Not vulnerable (3.4.0-6.25)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	precise	Does not exist
	trusty	Does not exist
	upstream	Released (2.6.23~rc1)
	wily	Not vulnerable (4.2.0-1008.12)
	xenial	Not vulnerable (4.2.0-1013.19)

Severity score breakdown

Parameter	Value
Base score	5.5
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

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