Buffer overflow in Xen
CVE-2020-29040
An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- xenbits.xen.org/xsa/advisory-355.html (Vendor Advisory)
- xenbits.xen.org/xsa/advisory-355.html (Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/01/19/4 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-29040?
- CVE-2020-29040 is a high-severity vulnerability in Xen, classified under Off-by-one Error. CVSS score: 8.8/10. Published 2020-11-24.
- How severe is CVE-2020-29040?
- High severity. CVSS v3 base score is 8.8 out of 10.