CVE-2019-19318

MEDIUM 4.4EPSS 0.6%

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: 4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0: 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, 48th percentile
Published: 2019-11-27
Updated: 2024-08-05

Proof-of-concept exploits (1)

bobfuzzer/CVE/tree/master/CVE-2019-19318

References

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