CVE-2020-6559: debian debian_linux Use After Free
Vulnerability summary
CVE-2020-6559 is a high (CVSS 9.3) Use After Free vulnerability in debian debian_linux. EPSS estimates a 2.30% chance of exploitation in the next 30 days, higher than 83.2% 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 11 · Related 9Timeline
- 21-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Use after free in presentation API in Google Chrome prior to 85.0.4183.83 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.30%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.30% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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
- fedoraEOL33
Google1 product
- chrome≥ unspecified, < 85.0.4183.83 | < 85.0.4183.83
Ubuntu1 product
- chromium-browser< 85.0.4183.83-0ubuntu0.16.04.2 | < 85.0.4183.83-0ubuntu0.18.04.2
5 vendors · 7 products
References
11 links- chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_25.htmlX Refsource MISCVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00072.htmlVendor AdvisoryX Refsource SUSEMailing ListThird 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
