CVE-2020-6553: debian debian_linux Use After Free
CVSS: 9.3v2.0HighModified
AliasesUBUNTU-CVE-2020-6553DEBIAN-CVE-2020-6553
Published 21-09-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-6553 is a high (CVSS 9.3) Use After Free vulnerability in debian debian_linux. EPSS estimates a 1.52% chance of exploitation in the next 30 days, higher than 74.3% of scored vulnerabilities.
CVSS score
9.3/10
010
High · v2.0 (NVD)EPSS score
1.52%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 9 · Related 7Timeline
- 21-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Use after free in offline mode in Google Chrome on iOS prior to 84.0.4147.125 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- 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
High 9.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
1.52%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
0.00 pp
From 1.52% on 21-09-2026
21-09-202621-10-2026
EPSS score1.52%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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
Debian2 products
- chromium< 87.0.4280.88-0.1
- debian_linuxEOL10.0
Fedoraproject1 product
- fedoraEOL33
Google1 product
- chrome≥ unspecified, < 84.0.4147.125 | < 84.0.4147.125
Ubuntu1 product
- chromium-browser< 85.0.4183.83-0ubuntu0.16.04.2 | < 85.0.4183.83-0ubuntu0.18.04.2
4 vendors · 5 products
References
7 links- chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop.htmlX Refsource MISCVendor Advisory
