CVE-2018-18828

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3,...

6.5 Medium

CVE-2018-18828 is a medium vulnerability (CVSS 6.5) in Libav, published October 30, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.92%Up 0.5 points since Apr 14, 2021

What each source reports

NVD Score used 6.5

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: CVE-2018-18828
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: CVE-2018-18828
Updated: 2026-11-02

EUVDEUVD-2018-10544 No score

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: EUVD-2018-10544
Updated: 2026-11-03

GitHub AdvisoriesGHSA-38mc-wg4f-vp95 6.5

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3,...

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: GHSA-38mc-wg4f-vp95
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 6.5

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: CVE-2018-18828
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-18828 6.5

There exists a heap-based buffer overflow in vc1_decode_i_block_adv in vc1_block.c in Libav 12.3, which allows attackers to cause a denial-of-service via a crafted aac file.

Record: UBUNTU-CVE-2018-18828
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

libav

Affected packages

Affected packages
Package	Affected	Fixed
`gst-libav1.0` Ubuntu:16.04:LTS	All versions, plus listed versions 1.6.0-11.6.0-21.6.1-11.6.2-11.7.1-1 Show 7 moreShow less 1.7.2-11.7.90-11.8.0-11.8.1-1~ubuntu11.8.2-1~ubuntu11.8.3-1ubuntu0.11.8.3-1ubuntu0.2	None known
`gst-libav1.0` Ubuntu:18.04:LTS	All versions, plus listed versions 1.12.2-11.12.3-11.12.4-11.13.91-11.14.0-11.14.1-1~ubuntu18.04.11.14.4-0ubuntu1~ubuntu18.04.11.14.5-0ubuntu1~18.04.1	None known
`qtwebengine-opensource-src` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 5.9.1+dfsg-45.9.1+dfsg-4ubuntu15.9.2+dfsg-2ubuntu15.9.3+dfsg-0ubuntu15.9.4+dfsg-0ubuntu15.9.5+dfsg-0ubuntu25.9.5+dfsg-0ubuntu2+esm1	None known
`gst-libav1.0` Ubuntu:20.04:LTS	All versions, plus listed versions 1.16.1-11.16.2-11.16.2-2	None known
`qtwebengine-opensource-src` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 5.12.4+dfsg-1ubuntu15.12.4+dfsg-1ubuntu35.12.5+dfsg-3ubuntu15.12.5+dfsg-6ubuntu25.12.5+dfsg-7 Show 4 moreShow less 5.12.5+dfsg-7build15.12.8+dfsg-0ubuntu15.12.8+dfsg-0ubuntu1.15.12.8+dfsg-0ubuntu1.1+esm1	None known
`gst-libav1.0` Ubuntu:22.04:LTS	All versions, plus listed versions 1.18.5-11.20.0-11.20.1-11.20.3-0ubuntu1	None known
`qtwebengine-opensource-src` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 5.15.6+dfsg-15.15.6+dfsg-25.15.7+dfsg-25.15.8+dfsg-15.15.8+dfsg-1build1 Show 4 moreShow less 5.15.8+dfsg-1build25.15.8+dfsg-25.15.9+dfsg-15.15.9+dfsg-1ubuntu0.1~esm1	None known
`gst-libav1.0` Ubuntu:24.04:LTS	All versions, plus listed versions 1.22.5-11.22.6-11.22.7-11.22.8-11.22.10-11.24.1-11.24.1-1build1	None known
`qtwebengine-opensource-src` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 5.15.15+dfsg-25.15.15+dfsg-2build25.15.15+dfsg-2ubuntu15.15.16+dfsg-15.15.16+dfsg-1ubuntu25.15.16+dfsg-1ubuntu45.15.16+dfsg-35.15.16+dfsg-3ubuntu0.1~esm1	None known
`gst-libav1.0` Ubuntu:25.10	All versions, plus listed versions 1.26.0-11.26.1-11.26.2-11.26.3-11.26.4-11.26.5-11.26.6-1	None known

Show 5 moreShow less

Affected packages
Package	Affected	Fixed
`qtwebengine-opensource-src` Ubuntu:25.10	All versions, plus listed versions 5.15.18+dfsg-25.15.18+dfsg-2build15.15.19+dfsg-15.15.19+dfsg2-1	None known
`gst-libav1.0` Ubuntu:26.10	All versions, plus listed versions 1.28.2-11.28.3-11.28.4-1build11.28.5-11.28.6-11.28.7-1	None known
`qtwebengine-opensource-src` Ubuntu:26.10	All versions, plus listed versions 5.15.19+dfsg2-45.15.19+dfsg2-65.15.19+dfsg2-7	None known
`gst-libav1.0` Ubuntu:26.04:LTS	All versions, plus listed versions 1.26.6-11.27.2-11.27.2-1build11.27.90-11.28.0-11.28.1-11.28.2-1	None known
`qtwebengine-opensource-src` Ubuntu:Pro:26.04:LTS	All versions, plus listed versions 5.15.19+dfsg2-15.15.19+dfsg2-1build15.15.19+dfsg2-25.15.19+dfsg2-35.15.19+dfsg2-45.15.19+dfsg2-4ubuntu0.1~esm1	None known

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References