Red Hat Security Advisory: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
CVE-2026-46323 is a use-after-free vulnerability in the Linux kernel's GRO networking subsystem caused by improper management of page reference counts when merging zerocopy socket buffers with the SKBFL_MANAGED_FRAG_REFS flag set. This memory corruption flaw can be exploited to cause system instability or arbitrary code execution on affected Red Hat Enterprise Linux 10 systems. Red Hat has issued a security advisory and released updated kernel packages to remediate this issue.
Potential Impact
The vulnerability allows an attacker with local access to trigger a use-after-free condition in the kernel, leading to memory corruption. This can result in system crashes, denial of service, or potentially arbitrary code execution with elevated privileges. The impact on confidentiality, integrity, and availability is rated high by Red Hat.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Enterprise Linux 10 that addresses this vulnerability. Users should apply the updated kernel packages and reboot affected systems to ensure the fix takes effect. No alternative mitigations are currently available or meet Red Hat's criteria for deployment and stability.
Red Hat Security Advisory: kernel security update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-46323 is a use-after-free vulnerability in the Linux kernel's GRO networking subsystem caused by improper management of page reference counts when merging zerocopy socket buffers with the SKBFL_MANAGED_FRAG_REFS flag set. This memory corruption flaw can be exploited to cause system instability or arbitrary code execution on affected Red Hat Enterprise Linux 10 systems. Red Hat has issued a security advisory and released updated kernel packages to remediate this issue.
Potential Impact
The vulnerability allows an attacker with local access to trigger a use-after-free condition in the kernel, leading to memory corruption. This can result in system crashes, denial of service, or potentially arbitrary code execution with elevated privileges. The impact on confidentiality, integrity, and availability is rated high by Red Hat.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Enterprise Linux 10 that addresses this vulnerability. Users should apply the updated kernel packages and reboot affected systems to ensure the fix takes effect. No alternative mitigations are currently available or meet Red Hat's criteria for deployment and stability.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-46323
- Cve Count
- 1
- Cvss Version
- 3.1
Threat ID: 6a294d9c8dd33fbd853b00d3
Added to database: 06/10/2026, 11:42:20 UTC
Last enriched: 08/06/2026, 23:54:15 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 147
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