Red Hat Security Advisory: wireshark security update
Two security vulnerabilities have been identified in the Wireshark packages included with Red Hat Enterprise Linux 10 and related distributions. These include a buffer over-read (CVE-2026-3203) and an improperly controlled sequential memory allocation (CVE-2026-3201). Both issues have been addressed in updated Wireshark packages provided by Red Hat. The security impact is rated as moderate by Red Hat Product Security. Users of affected Red Hat Enterprise Linux 10 and CodeReady Linux Builder 10 versions should apply the available updates to mitigate these vulnerabilities.
AI Analysis
Technical Summary
Red Hat Product Security issued an advisory (RHSA-2026:9666) for Wireshark packages in Red Hat Enterprise Linux 10 and related builds, addressing two vulnerabilities: CVE-2026-3203 (buffer over-read) and CVE-2026-3201 (improperly controlled sequential memory allocation). These vulnerabilities could potentially lead to memory corruption issues. Red Hat has released updated Wireshark packages (version 4.4.2-4.el10_1.4) that fix these issues. The advisory rates the security impact as moderate and provides detailed package updates for multiple architectures including x86_64, s390x, ppc64le, and aarch64. No CVSS score is provided in the advisory, but the vendor classifies the severity as moderate.
Potential Impact
The vulnerabilities involve memory handling flaws in Wireshark that could lead to buffer over-read and improper memory allocation. Such issues may cause application crashes or potentially allow attackers to manipulate memory, which could lead to denial of service or other unintended behavior. Red Hat rates the impact as moderate, indicating a significant but not critical risk. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Wireshark packages that address these vulnerabilities. Users should apply the security update RHSA-2026:9666 for Red Hat Enterprise Linux 10 and related CodeReady Linux Builder 10 packages to remediate these issues. Detailed update instructions are available in the Red Hat advisory and article https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor.
Red Hat Security Advisory: wireshark security update
Description
Two security vulnerabilities have been identified in the Wireshark packages included with Red Hat Enterprise Linux 10 and related distributions. These include a buffer over-read (CVE-2026-3203) and an improperly controlled sequential memory allocation (CVE-2026-3201). Both issues have been addressed in updated Wireshark packages provided by Red Hat. The security impact is rated as moderate by Red Hat Product Security. Users of affected Red Hat Enterprise Linux 10 and CodeReady Linux Builder 10 versions should apply the available updates to mitigate these vulnerabilities.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security issued an advisory (RHSA-2026:9666) for Wireshark packages in Red Hat Enterprise Linux 10 and related builds, addressing two vulnerabilities: CVE-2026-3203 (buffer over-read) and CVE-2026-3201 (improperly controlled sequential memory allocation). These vulnerabilities could potentially lead to memory corruption issues. Red Hat has released updated Wireshark packages (version 4.4.2-4.el10_1.4) that fix these issues. The advisory rates the security impact as moderate and provides detailed package updates for multiple architectures including x86_64, s390x, ppc64le, and aarch64. No CVSS score is provided in the advisory, but the vendor classifies the severity as moderate.
Potential Impact
The vulnerabilities involve memory handling flaws in Wireshark that could lead to buffer over-read and improper memory allocation. Such issues may cause application crashes or potentially allow attackers to manipulate memory, which could lead to denial of service or other unintended behavior. Red Hat rates the impact as moderate, indicating a significant but not critical risk. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Wireshark packages that address these vulnerabilities. Users should apply the security update RHSA-2026:9666 for Red Hat Enterprise Linux 10 and related CodeReady Linux Builder 10 packages to remediate these issues. Detailed update instructions are available in the Red Hat advisory and article https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:9666
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-3203"]
- Cvss Version
- null
Threat ID: 6a32705d0b89be68881d4a8d
Added to database: 06/17/2026, 10:01:01 UTC
Last enriched: 07/09/2026, 10:54:21 UTC
Last updated: 08/01/2026, 07:18:00 UTC
Views: 101
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