Описание
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.
Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
A flaw was found in the Google Brotli decoder. An out-of-bounds write in the block-type switch handling in c/dec/decode.c can be triggered by a crafted Brotli-compressed stream. When an application decompresses untrusted Brotli data, this can lead to memory disclosure, denial of service, or potentially arbitrary code execution.
Отчет
This issue is rated Important. Exploitation requires that the target decompress attacker-controlled Brotli data (for example HTTP content negotiated with Content-Encoding: br, or APIs such as Node.js zlib / fetch() that decode Brotli). The vulnerable path is reached with a malformed stream rather than typical well-formed encoder output. Red Hat Enterprise Linux compiler and runtime hardenings - including Address Space Layout Randomization (ASLR), Non-eXecutable (NX) memory, FORTIFY_SOURCE, and SELinux - increase the difficulty of turning this memory corruption into reliable code execution, though they do not eliminate crashes or all impact. Combined with the Attack Requirements noted by the CNA (CVSS v4 AT:P), Red Hat scores Attack Complexity as High and rates the flaw Important rather than Critical.
The Node.js packages in Red Hat Enterprise Linux use either system version of brotli or bundled version. Some Node.js versions are marked "Not affected" because they utilize system brotli. For these versions, the Node.js package itself does not require updating. However, customers must still update the system brotli/libbrotli package to address the vulnerability for these Node.js installations. Following is the overview of Node.js versions use system or bundled version.
- Node.js 22 in Red Hat Enterprise Linux 8 and 9, provided via nodejs:22 module, uses system brotli.
- Node.js 24 in Red Hat Enterprise Linux 8 and 9, provided via nodejs:24 modules, use bundled brotli.
- Node.js 22 and 24 in Red Hat Enterprise Linux 10, provided via nodejs22 and nodejs24 use system brotli.
The .NET packages in Red Hat Enterprise Linux may either use system version of brotli or bundled version. Following is the overview of .NET versions use system or bundled version.
- .NET 8.0 in Red Hat Enterprise Linux 8, 9, and 10, provided via dotnet8.0 packages, use bundled brotli.
- .NET 9.0, 10.0, and 11.0 in Red Hat Enterprise Linux 8, 9, and 10, provided via dotnet9.0, dotnet10.0, and dotnet11.0 packages, use system brotli.
Меры по смягчению последствий
See the security bulletin for a detailed mitigation procedure.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Confidential Compute Attestation | build-of-trustee/trustee-rhel9 | Not affected | ||
| Exploit Intelligence | exploit-intelligence/agent-client-rhel9 | Affected | ||
| Exploit Intelligence | exploit-intelligence/vulnerability-analysis-rhel9 | Affected | ||
| Logging Subsystem for Red Hat OpenShift | openshift-logging/vector-rhel9 | Not affected | ||
| OpenShift Service Mesh 3 | istio-proxy | Not affected | ||
| OpenShift Service Mesh 3 | openshift-service-mesh/istio-proxyv2-rhel9 | Not affected | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/ee-supported-rhel8 | Not affected | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/ee-supported-rhel9 | Not affected | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-24/platform-resource-runner-rhel8 | Not affected | ||
| Red Hat Ansible Automation Platform 2 | ansible-automation-platform-25/controller-rhel8 | Not affected |
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Дополнительная информация
Статус:
EPSS
8.1 High
CVSS3
Связанные уязвимости
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
Google: CVE-2026-111497 Buffer overflow vulnerability in the Brotli decoder
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) ...
EPSS
8.1 High
CVSS3