01 Record

CVE-2020-8927

Buffer overflow in Brotli library

MediumPUBLISHEDCNA: Google

CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

View raw JSON

02 Description

Buffer overflow in Brotli library

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

3.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 88.1% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2020-09-15 09:15Z6 YR AGO

Last updated

2026-05-29 20:52Z5 MO AGO

Reserved

2020-02-12

Assigning CNA

Google

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

CWE-130Improper Handling of Length Parameter InconsistencyBase
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

6b4e4a92e7b35cc37556f5e07ec9e45caebf7c45079a25eca91f9fb6c849a4d6

05 Affected products

VendorProductVersionsPlatforms

Google LLCBrotlistable to 1.0.7—

06 References

github.comhttps://github.com/google/brotli/releases/tag/v1.0.9x_refsource_CONFIRM
lists.opensuse.orgopenSUSE-SU-2020:1578http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.htmlvendor-advisoryx_refsource_SUSE
lists.fedoraproject.orgFEDORA-2020-22d278923ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MMBKACMLSRX7JJSKBTR35UOEP2WFR6QP/vendor-advisoryx_refsource_FEDORA
usn.ubuntu.comUSN-4568-1https://usn.ubuntu.com/4568-1/vendor-advisoryx_refsource_UBUNTU
lists.fedoraproject.orgFEDORA-2020-c663fbc46chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WW62OZEY2GHJL4JCOLJRBSRETXDHMWRK/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2020-e21bd401adhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J4E265WKWKYMK2RYYSIXBEGZTDY5IQE6/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2020-bc9a739f0chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4VCDOJGL6BK3HB4XRD2WETBPYX2ITF6/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2020-9336b65f82https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W23CUADGMVMQQNFKHPHXVP7RPZJZNN6I/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2020-c76a35b209https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/356JOYTWW4BWSZ42SEFLV7NYHL3S3AEH/vendor-advisoryx_refsource_FEDORA
lists.debian.org[debian-lts-announce] 20201201 [SECURITY] [DLA 2476-1] brotli security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00003.htmlmailing-listx_refsource_MLIST
www.debian.orgDSA-4801https://www.debian.org/security/2020/dsa-4801vendor-advisoryx_refsource_DEBIAN
lists.fedoraproject.orgFEDORA-2022-9e046f579ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXEQ3GQVELA2T4HNZG7VPMS2HDVXMJRG/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2022-5ecee47acbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQLM7ABVCYJLF6JRPF3M3EBXW63GNC27/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2022-d28042f559https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TOGTZ2ZWDH662ZNFFSZVL3M5AJXV6JF/vendor-advisoryx_refsource_FEDORA

07 Fixed in

AlmaLinux 8

aspnetcore-runtime-3.1
Fixed in 3.1.23-1.el8_5
aspnetcore-runtime-5.0
Fixed in 5.0.15-1.el8_5
aspnetcore-targeting-pack-3.1
Fixed in 3.1.23-1.el8_5
aspnetcore-targeting-pack-5.0
Fixed in 5.0.15-1.el8_5
brotli
Fixed in 1.0.6-3.el8
brotli-devel
Fixed in 1.0.6-3.el8
dotnet-apphost-pack-3.1
Fixed in 3.1.23-1.el8_5
dotnet-apphost-pack-5.0
Fixed in 5.0.15-1.el8_5
dotnet-hostfxr-3.1
Fixed in 3.1.23-1.el8_5
dotnet-hostfxr-5.0
Fixed in 5.0.15-1.el8_5
dotnet-runtime-3.1
Fixed in 3.1.23-1.el8_5
dotnet-runtime-5.0
Fixed in 5.0.15-1.el8_5
dotnet-sdk-3.1
Fixed in 3.1.417-1.el8_5
dotnet-sdk-3.1-source-built-artifacts
Fixed in 3.1.417-1.el8_5
dotnet-sdk-5.0
Fixed in 5.0.212-1.el8_5
dotnet-sdk-5.0-source-built-artifacts
Fixed in 5.0.212-1.el8_5
dotnet-targeting-pack-3.1
Fixed in 3.1.23-1.el8_5
dotnet-targeting-pack-5.0
Fixed in 5.0.15-1.el8_5
dotnet-templates-3.1
Fixed in 3.1.417-1.el8_5
dotnet-templates-5.0
Fixed in 5.0.212-1.el8_5
python3-brotli
Fixed in 1.0.6-3.el8

Arch Linux

brotli
Fixed in 1.0.9-1
lib32-brotli
Fixed in 1.0.9-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

aspnetcore-runtime-3.1
Fixed in 3.1.23-1.el8_5
aspnetcore-runtime-5.0
Fixed in 5.0.15-1.el8_5
aspnetcore-targeting-pack-3.1
Fixed in 3.1.23-1.el8_5
aspnetcore-targeting-pack-5.0
Fixed in 5.0.15-1.el8_5
brotli
Fixed in 1.0.6-3.el8
brotli-devel
Fixed in 1.0.6-3.el8
dotnet-apphost-pack-3.1
Fixed in 3.1.23-1.el8_5
dotnet-apphost-pack-5.0
Fixed in 5.0.15-1.el8_5
dotnet-hostfxr-3.1
Fixed in 3.1.23-1.el8_5
dotnet-hostfxr-5.0
Fixed in 5.0.15-1.el8_5
dotnet-runtime-3.1
Fixed in 3.1.23-1.el8_5
dotnet-runtime-5.0
Fixed in 5.0.15-1.el8_5
dotnet-sdk-3.1
Fixed in 3.1.417-1.el8_5
dotnet-sdk-3.1-source-built-artifacts
Fixed in 3.1.417-1.el8_5
dotnet-sdk-5.0
Fixed in 5.0.212-1.el8_5
dotnet-sdk-5.0-source-built-artifacts
Fixed in 5.0.212-1.el8_5
dotnet-targeting-pack-3.1
Fixed in 3.1.23-1.el8_5
dotnet-targeting-pack-5.0
Fixed in 5.0.15-1.el8_5
dotnet-templates-3.1
Fixed in 3.1.417-1.el8_5
dotnet-templates-5.0
Fixed in 5.0.212-1.el8_5
python3-brotli
Fixed in 1.0.6-3.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

brotli
Fixed in 1.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

brotli
Fixed in 1.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

brotli
Fixed in 1.0.9-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

brotli
Fixed in 1.0.3-1ubuntu1~16.04.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

brotli
Fixed in 1.0.3-1ubuntu1.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

brotli
Fixed in 1.0.7-6ubuntu0.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.