CVE-2019-19318

moderate-risk
Published 2019-11-28

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,

Do I need to act?

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0.35% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.4/10 Medium
LOCAL / LOW complexity

Affected Products (17)

Aff A700S Firmware
Fas8300 Firmware
Fas8700 Firmware

Affected Vendors

Debian Linux Canonical Netapp Opensuse

References (10)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
Exploit https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318
Mailing List https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20200103-0001/
Third Party Advisory https://usn.ubuntu.com/4414-1/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
Exploit https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318
Mailing List https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20200103-0001/
Third Party Advisory https://usn.ubuntu.com/4414-1/
35
/ 100
moderate-risk
Severity 15/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 19/34 · Moderate