Alerts This Week
Warning Icon 1 764
Alerts This Week
Warning Icon 1 764

Ubuntu 25.04: Linux Kernel Critical Security Flaws USN-7879-1

ubuntu
Calendar Grey November 21, 2025
Dist Ubuntu Esm H88
Multiple security issues in Linux kernel fixed in Ubuntu. Immediate updates recommended for system integrity.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.04 - Ubuntu 24.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-realtime: Linux kernel for Real-time systems - linux-hwe-6.14: Linux hardware enablement (HWE) kernel Details: It was discovered that improper initialization of CPU cache memory could allow a local attacker with hypervisor access to overwrite SEV-SNP guest memory resulting in loss of data integrity. (CVE-2024-36331) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - PowerPC architecture; - S390 architecture; - x86 arch...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu local attack data integrity Linux kernel

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.04 linux-image-6.14.0-1016-realtime 6.14.0-1016.16 linux-image-6.14.0-1017-aws 6.14.0-1017.17 linux-image-6.14.0-1017-aws-64k 6.14.0-1017.17 linux-image-6.14.0-1017-oracle 6.14.0-1017.17 linux-image-6.14.0-1017-oracle-64k 6.14.0-1017.17 linux-image-6.14.0-1020-gcp 6.14.0-1020.21 linux-image-6.14.0-1020-gcp-64k 6.14.0-1020.21 linux-image-6.14.0-36-generic 6.14.0-36.36 linux-image-6.14.0-36-generic-64k 6.14.0-36.36 linux-image-aws 6.14.0-1017.17 linux-image-aws-6.14 6.14.0-1017.17 linux-image-aws-64k 6.14.0-1017.17 linux-image-aws-64k-6.14 6.14.0-1017.17 linux-image-gcp 6.14.0-1020.21 linux-image-gcp-6.14 6.14.0-1020.21 linux-image-gcp-64k 6.14.0-1020.21 linux-image-gcp-64k-6.14 6.14.0-1020.21 linux-image-generic 6.14.0-36.36 linux-image-generic-6.14 6.14.0-36.36 linux-image-generic-64k 6.14.0-36.36 linux-image-generic-64k-6.14 6.14.0-36.36 linux-image-oem-24.04 6.14.0-36.36 linux-image-oem-24.04a 6.14.0-36.36 linux-image-oracle 6.14.0-1017.17 linux-image-oracle-6.14 6.14.0-1017.17 linux-image-oracle-64k 6.14.0-1017.17 linux-image-oracle-64k-6.14 6.14.0-1017.17 linux-image-realtime 6.14.0-1016.16 linux-image-realtime-6.14 6.14.0-1016.16 linux-image-virtual 6.14.0-36.36 linux-image-virtual-6.14 6.14.0-36.36 Ubuntu 24.04 LTS linux-image-6.14.0-36-generic 6.14.0-36.36~24.04.1 linux-image-6.14.0-36-generic-64k 6.14.0-36.36~24.04.1 linux-image-generic-6.14 6.14.0-36.36~24.04.1 linux-image-generic-64k-6.14 6.14.0-36.36~24.04.1 linux-image-generic-64k-hwe-24.04 6.14.0-36.36~24.04.1 linux-image-generic-hwe-24.04 6.14.0-36.36~24.04.1 linux-image-virtual-6.14 6.14.0-36.36~24.04.1 linux-image-virtual-hwe-24.04 6.14.0-36.36~24.04.1 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

References

https://ubuntu.com/security/notices/USN-7879-1

CVE-2024-36331, CVE-2025-38335, CVE-2025-38349, CVE-2025-38351,

CVE-2025-38437, CVE-2025-38438, CVE-2025-38439, CVE-2025-38440,

CVE-2025-38441, CVE-2025-38443, CVE-2025-38444, CVE-2025-38445,

CVE-2025-38446, CVE-2025-38448, CVE-2025-38449, CVE-2025-38450,

CVE-2025-38451, CVE-2025-38452, CVE-2025-38453, CVE-2025-38454,

CVE-2025-38455, CVE-2025-38456, CVE-2025-38457, CVE-2025-38458,

CVE-2025-38459, CVE-2025-38460, CVE-2025-38461, CVE-2025-38462,

CVE-2025-38463, CVE-2025-38464, CVE-2025-38465, CVE-2025-38466,

CVE-2025-38467, CVE-2025-38468, CVE-2025-38469, CVE-2025-38470,

CVE-2025-38471, CVE-2025-38472, CVE-2025-38473, CVE-2025-38474,

CVE-2025-38475, CVE-2025-38476, CVE-2025-38478, CVE-2025-38480,

CVE-2025-38481, CVE-2025-38482, CVE-2025-38483, CVE-2025-38484,

CVE-2025-38485, CVE-2025-38487, CVE-2025-38488, CVE-2025-38489,

CVE-2025-38490, CVE-2025-38491, CVE-2025-38492, CVE-2025-38493,

CVE-2025-38494, CVE-2025-38495, CVE-2025-38496, CVE-2025-38497,

CVE-2025-38501, CVE-2025-38503, CVE-2025-38505, CVE-2025-38506,

CVE-2025-38507, CVE-2025-38508, CVE-2025-38509, CVE-2025-38510,

CVE-2025-38511, CVE-2025-38512, CVE-2025-38513, CVE-2025-38514,

CVE-2025-38515, CVE-2025-38516, CVE-2025-38517, CVE-2025-38520,

CVE-2025-38521, CVE-2025-38524, CVE-2025-38525, CVE-2025-38526,

CVE-2025-38527, CVE-2025-38528, CVE-2025-38529, CVE-2025-38530,

CVE-2025-38531, CVE-2025-38532, CVE-2025-38533, CVE-2025-38534,

CVE-2025-38535, CVE-2025-38537, CVE-2025-38538, CVE-2025-38539,

CVE-2025-38540, CVE-2025-38542, CVE-2025-38543, CVE-2025-38544,

CVE-2025-38545, CVE-2025-38546, CVE-2025-38547, CVE-2025-38548,

CVE-2025-38549, CVE-2025-38550, CVE-2025-38551, CVE-2025-38552,

CVE-2025-38553, CVE-2025-38555, CVE-2025-38556, CVE-2025-38557,

CVE-2025-38558, CVE-2025-38559, CVE-2025-38560, CVE-2025-38561,

CVE-2025-38562, CVE-2025-38563, CVE-2025-38565, CVE-2025-38566,

CVE-2025-38567, CVE-2025-38568, CVE-2025-38569, CVE-2025-38570,

CVE-2025-38571, CVE-2025-38572, CVE-2025-38573, CVE-2025-38574,

CVE-2025-38576, CVE-2025-38577, CVE-2025-38578, CVE-2025-38579,

CVE-2025-38581, CVE-2025-38582, CVE-2025-38583, CVE-2025-38584,

CVE-2025-38585, CVE-2025-38586, CVE-2025-38587, CVE-2025-38588,

CVE-2025-38589, CVE-2025-38590, CVE-2025-38593, CVE-2025-38595,

CVE-2025-38601, CVE-2025-38602, CVE-2025-38604, CVE-2025-38605,

CVE-2025-38606, CVE-2025-38608, CVE-2025-38609, CVE-2025-38610,

CVE-2025-38612, CVE-2025-38615, CVE-2025-38616, CVE-2025-38619,

CVE-2025-38622, CVE-2025-38623, CVE-2025-38624, CVE-2025-38625,

CVE-2025-38626, CVE-2025-38628, CVE-2025-38629, CVE-2025-38630,

CVE-2025-38631, CVE-2025-38632, CVE-2025-38634, CVE-2025-38635,

CVE-2025-38639, CVE-2025-38640, CVE-2025-38642, CVE-2025-38643,

CVE-2025-38644, CVE-2025-38645, CVE-2025-38646, CVE-2025-38648,

CVE-2025-38649, CVE-2025-38650, CVE-2025-38652, CVE-2025-38653,

CVE-2025-38654, CVE-2025-38655, CVE-2025-38659, CVE-2025-38660,

CVE-2025-38662, CVE-2025-38663, CVE-2025-38664, CVE-2025-38665,

CVE-2025-38666, CVE-2025-38668, CVE-2025-38670, CVE-2025-38671,

CVE-2025-38675, CVE-2025-38678, CVE-2025-39725, CVE-2025-39726,

CVE-2025-39727, CVE-2025-39730, CVE-2025-39731, CVE-2025-39732,

CVE-2025-39734, CVE-2025-39809, CVE-2025-39818, CVE-2025-40157

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7879-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu local attack data integrity Linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/6.14.0-1017.17 https://launchpad.net/ubuntu/+source/linux-gcp/6.14.0-1020.21 https://launchpad.net/ubuntu/+source/linux-realtime/6.14.0-1016.16 https://launchpad.net/ubuntu/+source/linux-hwe-6.14/6.14.0-36.36~24.04.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here