CVE-2020-6576: debian debian_linux Use After Free
Vulnerability summary
CVE-2020-6576 is a high (CVSS 8.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 1.64% chance of exploitation in the next 30 days, higher than 76.3% of scored vulnerabilities.
Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 21-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Use after free in offscreen canvas in Google Chrome prior to 85.0.4183.102 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.64%
Chance of exploitation in the next 30 days
Percentile
76%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.64% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- chromium< 87.0.4280.88-0.1
- debian_linuxEOL10.0
Opensuse2 products
- backports_sle15.0:sp1 | 15.0:sp2
- leapEOL15.1 | 15.2
Fedoraproject1 product
- fedoraEOL31 | 33
Google1 product
- chrome≥ unspecified, < 85.0.4183.102 | < 85.0.4183.102
Ubuntu1 product
- chromium-browser< 85.0.4183.121-0ubuntu0.16.04.1 | < 85.0.4183.121-0ubuntu0.18.04.1
5 vendors · 7 products
References
13 links- chromereleases.googleblog.com/2020/09/stable-channel-update-for-desktop.htmlX Refsource MISCREPORTRelease NotesVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00072.htmlVendor AdvisoryX Refsource SUSEMailing ListPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00078.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00081.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00049.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
