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CVE-2018-11490

27
FAUCET Score

CVE-2018-11490 describes a heap-based buffer overflow in the DGifDecompressLine function of GIFLIB (and subsequently sam2p 0.49.4) due to an unchecked array index. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk with potential for denial of service or other unspecified impacts, requiring user interaction for exploitation. While the vulnerability is severe, there is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, <= 3.1.1CPE matchmatch criteria
cpe:2.3:a:giflib_project:giflib:*:*:*:*:*:*:*:*
0.49.4CPE matchmatch criteria
cpe:2.3:a:sam2p_project:sam2p:0.49.4:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.48%
Probability of exploitation in next 30 days
EPSS Percentile
82.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0248 is in the 82nd percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 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 0.1 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2018-11490Low

giflib: heap-based buffer overflow in DGifDecompressLine function in dgif_lib.c

May 23, 2018

References

github.com / pts/sam2p/issues/38
Third Party Advisory
lists.debian.org / debian-lts-announce/2022/12/msg00008.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 4107-1
Third Party Advisory
securityfocus.com / bid/104327
Third Party AdvisoryVDB Entry