CVE-2019-19318

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,

CVSS v3.1 NVD

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

CVSS v2.0 NVD

2.1 LOWAV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.65% chance of exploitation in the next 30 days, 50th percentile

Published

2019-11-27

Updated

2024-08-05

Proof-of-concept exploits (1)

• bobfuzzer/CVE/tree/master/CVE-2019-1931861★ · 2020-10-25

Security advisories

• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
• https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
• https://security.netapp.com/advisory/ntap-20200103-0001
• https://usn.ubuntu.com/4414-1

References

• CVE Record
• NVD entry

Related

• CVE-2019-18885
• CVE-2019-19036
• CVE-2019-19037
• CVE-2019-19039
• CVE-2019-19319
• CVE-2019-19377