CVE-2021-38090: ffmpeg Classic Buffer Overflow
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2021-38090DEBIAN-CVE-2021-38090
Published 20-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-38090 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in ffmpeg. EPSS estimates a 1.28% chance of exploitation in the next 30 days, higher than 69.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.28%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 20-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Integer Overflow vulnerability in function filter16_roberts in libavfilter/vf_convolution.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 3 agree
- 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
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.28%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
+0.01 pp
From 1.27% on 19-09-2026
19-09-202619-10-2026
EPSS score1.28%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (trac.ffmpeg.org)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Affected systems
Debian1 product
- ffmpeg< 7:4.3-2
Ffmpeg1 product
- ffmpegEOL4.2.1
Ubuntu1 product
- ffmpeg< 7:4.2.7-0ubuntu0.1+esm3
3 vendors · 3 products
References
6 links- git.ffmpeg.org/gitweb/ffmpeg.git/commit/99f8d32129dd233d4eb2efa44678a0bc44869f23X Refsource MISCREPORTMailing ListPatchVendor Advisory
