CVE-2020-8649: debian debian_linux Use After Free
Vulnerability summary
CVE-2020-8649 is a medium (CVSS 5.9) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 42% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.9, physical access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 27 · Related 14Timeline
- 06-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.49%
Chance of exploitation in the next 30 days
Percentile
42%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.49% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: physical access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu36 products
- linuxAll versions (No fix recorded) | < 4.4.0-178.208 | < 4.15.0-99.100
- linux-aws< 4.4.0-1066.70 | < 4.4.0-1106.117 | < 4.15.0-1066.70
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1017.18~18.04.1
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
Debian2 products
- linux< 5.5.13-1
- debian_linuxEOL8.0 | 9.0
Linux1 product
- linux_kernel≤ 5.5.2
Opensuse1 product
- leapEOL15.1
4 vendors · 40 products
References
11 links- bugzilla.kernel.org/show_bug.cgi?id=206357X Refsource MISCREPORTExploitIssue TrackingVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
lists.debian.org/debian-lts-announce/2020/06/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2020/06/msg00012.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/06/msg00013.htmlMailing ListX Refsource MLISTThird Party Advisory
