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: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898) * kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971) * kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248) 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
The advisory covers security fixes for several Linux kernel vulnerabilities in Red Hat Enterprise Linux 7 Extended Lifecycle Support. Specifically, it addresses a heap overflow in the e1000e network driver (CVE-2025-39898), an index validation flaw in the i40e network driver (CVE-2025-39971), and a vsock vulnerability that could cause memory corruption (CVE-2025-40248). These issues are resolved by updated kernel packages provided by Red Hat. The advisory does not provide CVSS scores but classifies the impact as important. The update must be installed and the system rebooted to apply the fixes.
Potential Impact
The vulnerabilities could lead to memory corruption and heap overflow conditions within the Linux kernel, potentially affecting system stability and security. The issues are related to network drivers and vsock communication, which may be exploited to cause kernel-level memory corruption. Red Hat rates the overall security impact as important, indicating a significant risk if unpatched.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 7 Extended Lifecycle Support should apply the kernel update as detailed in the Red Hat advisory RHSA-2026:1581 and reboot their systems to activate the patches. No additional mitigations 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: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898) * kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971) * kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248) 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
The advisory covers security fixes for several Linux kernel vulnerabilities in Red Hat Enterprise Linux 7 Extended Lifecycle Support. Specifically, it addresses a heap overflow in the e1000e network driver (CVE-2025-39898), an index validation flaw in the i40e network driver (CVE-2025-39971), and a vsock vulnerability that could cause memory corruption (CVE-2025-40248). These issues are resolved by updated kernel packages provided by Red Hat. The advisory does not provide CVSS scores but classifies the impact as important. The update must be installed and the system rebooted to apply the fixes.
Potential Impact
The vulnerabilities could lead to memory corruption and heap overflow conditions within the Linux kernel, potentially affecting system stability and security. The issues are related to network drivers and vsock communication, which may be exploited to cause kernel-level memory corruption. Red Hat rates the overall security impact as important, indicating a significant risk if unpatched.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 7 Extended Lifecycle Support should apply the kernel update as detailed in the Red Hat advisory RHSA-2026:1581 and reboot their systems to activate the patches. No additional mitigations 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-2026:1581
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-39971","CVE-2025-39973","CVE-2025-40248"]
- Cvss Version
- null
Threat ID: 6a3da1c74853345fc1820d07
Added to database: 06/25/2026, 21:46:47 UTC
Last enriched: 06/25/2026, 21:59:11 UTC
Last updated: 07/02/2026, 19:51:10 UTC
Views: 13
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