Vulnerability in Linux
CVE-2022-33744
Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests' memory pages.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux — versions consult Xen advisory XSA-406
- Linux Kernel
- Debian Linux — versions 10.0, 11.0
References
- xenbits.xenproject.org/xsa/advisory-406.txt (Vendor Advisory)
- xenbits.xen.org/xsa/advisory-406.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/07/05/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5191 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/10/msg00000.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-33744?
- CVE-2022-33744 is a medium-severity vulnerability in Linux. CVSS score: 4.7/10. Published 2022-07-05.
- How severe is CVE-2022-33744?
- Medium severity. CVSS v3 base score is 4.7 out of 10.