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CVE-2018-7640

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs...

7.8 HighFix available

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.21%Up 0.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.8

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
CVE-2018-7640
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-125
Updated
2026-11-02
CVE List No score

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
CVE-2018-7640
Updated
2026-11-02
EUVDEUVD-2018-19359 No score

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
EUVD-2018-19359
Updated
2026-11-03
GitHub AdvisoriesGHSA-pgwm-98m2-3ffc 7.8

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs...

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
GHSA-pgwm-98m2-3ffc
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-125
Updated
2026-11-02
OSV 7.8

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
CVE-2018-7640
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-7640 7.8

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
DEBIAN-CVE-2018-7640
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-7640 7.8

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a Monochrome case, aka case 1.

Record
UBUNTU-CVE-2018-7640
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2018-0438 No score

Updated cimg and gmic packages fix security vulnerabilities

Updated cimg and gmic packages fix security vulnerabilities:

An issue was discovered in CImg v.220. DoS occurs when loading a crafted bmp image that triggers an allocation failure in load_bmp in CImg.h (CVE-2018-7587).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image (CVE-2018-7588).

An issue was discovered in CImg v.220. A double free in load_bmp in CImg.h occurs when loading a crafted bmp image (CVE-2018-7589).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image. This is in a "16 colors" case, aka case 4 (CVE-2018-7637).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image. This is in a "256 colors" case, aka case 8 (CVE-2018-7638).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image. This is in a "16 bits colors" case, aka case 16 (CVE-2018-7639).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image. This is in a Monochrome case, aka case 1 (CVE-2018-7640).

An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image. This is in a "32 bits colors" case, aka case 32 (CVE-2018-7641).

Record
MGASA-2018-0438
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cimg
Debian:12
 before 2.3.6+dfsg-1
2.3.6+dfsg-1
cimg
Debian:13
 before 2.3.6+dfsg-1
2.3.6+dfsg-1
cimg
Debian:14
 before 2.3.6+dfsg-1
2.3.6+dfsg-1
cimg
Debian:8
 before 1.5.9+dfsg-1+deb8u1, plus listed versions
1.5.9+dfsg-1
1.5.9+dfsg-1+deb8u1
cimg
Debian:9
 before 1.7.9+dfsg-1+deb9u1, plus listed versions
1.7.9+dfsg-1
1.7.9+dfsg-1+deb9u1
cimg
Mageia:6
 before 2.4.0-1.mga6
2.4.0-1.mga6
gmic
Mageia:6
 before 2.4.0-1.2.mga6
2.4.0-1.2.mga6
cimg
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.6.4+dfsg-1build11.6.5+dfsg-1
 None known
cimg
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.7.9+dfsg-21.7.9+dfsg-2build11.7.9+dfsg-2ubuntu0.18.04.11.7.9+dfsg-2ubuntu0.18.04.21.7.9+dfsg-2ubuntu0.18.04.2+esm1
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-7640 is a high vulnerability (CVSS 7.8) in Cimg, published March 2, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.21%, the 68th percentile. Fixed in cimg 2.3.6+dfsg-1.

References

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