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CVE-2017-9996

26
FAUCET Score

CVE-2017-9996 is a heap-based buffer overflow vulnerability in the cdxl_decode_frame function within FFmpeg versions 2.8.x through 3.3.x. This flaw arises from the failure to exclude the CHUNKY format during decoding, impacting various FFmpeg releases. With a CVSS score of 7.8 (High), it can be triggered by a remote attacker via a crafted file, leading to a denial of service (application crash) or potentially other unspecified impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.8CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:2.8:*:*:*:*:*:*:*
2.8.1CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:2.8.1:*:*:*:*:*:*:*
2.8.2CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:2.8.2:*:*:*:*:*:*:*
2.8.3CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:2.8.3:*:*:*:*:*:*:*
2.8.4CPE matchmatch criteria
cpe:2.3:a:ffmpeg:ffmpeg:2.8.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 76th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

bugs.chromium.org / p/oss-fuzz/issues/detail
Issue TrackingThird Party Advisory
bugs.chromium.org / p/oss-fuzz/issues/detail
Issue TrackingThird Party Advisory
github.com / FFmpeg/FFmpeg/commit/1e42736b95065c69a7481d0cf55247024f54b660
Issue TrackingPatchThird Party Advisory
github.com / FFmpeg/FFmpeg/commit/e1b60aad77c27ed5d4dfc11e5e6a05a38c70489d
Issue TrackingPatchThird Party Advisory
securityfocus.com / bid/99323
Third Party AdvisoryVDB Entry