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: RDMA/mlx5: Fix page_size variable overflow (CVE-2025-22091) * kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (CVE-2025-22121) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797) * kernel: powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap (CVE-2025-38088) * kernel: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access (CVE-2025-38110) 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
Red Hat issued a security advisory (RHSA-2025:11855) for Red Hat Enterprise Linux 10 kernel packages to fix five vulnerabilities: CVE-2025-22091 (RDMA/mlx5 page_size variable overflow), CVE-2025-22121 (ext4 out-of-bound read in ext4_xattr_inode_dec_ref_all()), CVE-2025-37797 (net_sched hfsc use-after-free in class handling), CVE-2025-38088 (powerpc/powernv/memtrace out-of-bounds mmap), and CVE-2025-38110 (net/mdiobus potential out-of-bounds clause 45 read/write). These vulnerabilities affect the Linux kernel core components and could lead to memory corruption or crashes. The advisory provides updated kernel packages and requires a reboot for the fixes to take effect.
Potential Impact
The vulnerabilities impact the Linux kernel's memory handling and scheduling components, potentially allowing out-of-bounds memory access and use-after-free conditions. This can lead to system instability, crashes, or other unintended behavior. The advisory rates the overall security impact as Moderate. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the security update for Red Hat Enterprise Linux 10 as described in the advisory (https://access.redhat.com/articles/11258) and reboot the system to activate the fixes. No additional mitigation steps are indicated beyond applying the official update and rebooting.
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: RDMA/mlx5: Fix page_size variable overflow (CVE-2025-22091) * kernel: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() (CVE-2025-22121) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797) * kernel: powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap (CVE-2025-38088) * kernel: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access (CVE-2025-38110) 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
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat issued a security advisory (RHSA-2025:11855) for Red Hat Enterprise Linux 10 kernel packages to fix five vulnerabilities: CVE-2025-22091 (RDMA/mlx5 page_size variable overflow), CVE-2025-22121 (ext4 out-of-bound read in ext4_xattr_inode_dec_ref_all()), CVE-2025-37797 (net_sched hfsc use-after-free in class handling), CVE-2025-38088 (powerpc/powernv/memtrace out-of-bounds mmap), and CVE-2025-38110 (net/mdiobus potential out-of-bounds clause 45 read/write). These vulnerabilities affect the Linux kernel core components and could lead to memory corruption or crashes. The advisory provides updated kernel packages and requires a reboot for the fixes to take effect.
Potential Impact
The vulnerabilities impact the Linux kernel's memory handling and scheduling components, potentially allowing out-of-bounds memory access and use-after-free conditions. This can lead to system instability, crashes, or other unintended behavior. The advisory rates the overall security impact as Moderate. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the security update for Red Hat Enterprise Linux 10 as described in the advisory (https://access.redhat.com/articles/11258) and reboot the system to activate the fixes. No additional mitigation steps are indicated beyond applying the official update and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:11855
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-22121","CVE-2025-37797","CVE-2025-38088","CVE-2025-38110"]
- Cvss Version
- null
Threat ID: 6a3da1e74853345fc182e880
Added to database: 06/25/2026, 21:47:19 UTC
Last enriched: 06/25/2026, 22:35:00 UTC
Last updated: 07/01/2026, 08:51:17 UTC
Views: 12
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