CVE-2019-19318

2019-11-2800:00:00

ubuntu.com

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

22.7%

JSON

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause
an rwsem_down_write_slowpath use-after-free because (in
rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags
returns an already freed pointer,

Bugs

<https://bugzilla.suse.com/show_bug.cgi?id=1158026>

Notes

Author	Note
tyhicks	Exploiting this vulnerability requires a crafted filesystem image to be mounted
sbeattie	possibly fixed by btrfs tree checker, which would mean it’s addressed for all kernels 4.4.x and newer.

OSVersionArchitecturePackageVersionFilename
ubuntu19.10noarchlinux< 5.3.0-22.24UNKNOWN
ubuntu19.10noarchlinux-aws< 5.3.0-1007.8UNKNOWN
ubuntu19.10noarchlinux-azure< 5.3.0-1007.8UNKNOWN
ubuntu19.10noarchlinux-gcp< 5.3.0-1008.9UNKNOWN
ubuntu19.10noarchlinux-kvm< 5.3.0-1007.8UNKNOWN
ubuntu19.10noarchlinux-oracle< 5.3.0-1006.7UNKNOWN
ubuntu19.10noarchlinux-raspi2< 5.3.0-1012.14UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	19.10	noarch	linux	< 5.3.0-22.24	UNKNOWN
ubuntu	19.10	noarch	linux-aws	< 5.3.0-1007.8	UNKNOWN
ubuntu	19.10	noarch	linux-azure	< 5.3.0-1007.8	UNKNOWN
ubuntu	19.10	noarch	linux-gcp	< 5.3.0-1008.9	UNKNOWN
ubuntu	19.10	noarch	linux-kvm	< 5.3.0-1007.8	UNKNOWN
ubuntu	19.10	noarch	linux-oracle	< 5.3.0-1006.7	UNKNOWN
ubuntu	19.10	noarch	linux-raspi2	< 5.3.0-1012.14	UNKNOWN