Ubuntu USN-8729-3 Fixes Linux kernel Vulnerabilities
Tech GuruQuick Answer
Ubuntu's USN-8729-3 covers the GCP 6.8 kernel on Ubuntu 22.04 and the IBM and Xilinx kernels on Ubuntu 24.04. Each package has its own fixed build below. Plan the required reboot and third-party-module rebuilds around the ABI change; the full vendor warning is retained in What Changed.
Confirm Scope And Apply The Supported Fix
What to do now: Match each host's Ubuntu release and kernel flavor, prepare compatible third-party modules and recovery access, install that package's fixed build, and reboot before closing the change.
Last verified: 2026-09-21 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Linux kernel vulnerabilities on Ubuntu 24.04 LTS (noble), Ubuntu 22.04 LTS (jammy) |
|---|---|
| Advisory | USN-8729-3 |
| CVEs | CVE-2025-71289, CVE-2026-23469, CVE-2026-31420, CVE-2026-31486, CVE-2026-31560, CVE-2026-46158, CVE-2026-46170, CVE-2026-46275, CVE-2026-46315, CVE-2026-52912, CVE-2026-52915, CVE-2026-52916, CVE-2026-52918, CVE-2026-52919, CVE-2026-52921, CVE-2026-52922, CVE-2026-52926, CVE-2026-52941, CVE-2026-53357, CVE-2026-64015, CVE-2026-64018, CVE-2026-64025, CVE-2026-64029, CVE-2026-64032, CVE-2026-64033, CVE-2026-64034, CVE-2026-64039, CVE-2026-64046, CVE-2026-64047, CVE-2026-64048, CVE-2026-64051, CVE-2026-64055, CVE-2026-64056, CVE-2026-64064, CVE-2026-64073, CVE-2026-64083, CVE-2026-64084, CVE-2026-64085, CVE-2026-64086, CVE-2026-64087, CVE-2026-64088, CVE-2026-64089, CVE-2026-64092, CVE-2026-64096, CVE-2026-64097, CVE-2026-64098, CVE-2026-64102, CVE-2026-64103, CVE-2026-64106, CVE-2026-64108, CVE-2026-64109, CVE-2026-64111, CVE-2026-64113, CVE-2026-64114, CVE-2026-64115, CVE-2026-64116, CVE-2026-64118, CVE-2026-64121, CVE-2026-64125, CVE-2026-64126, CVE-2026-64127, CVE-2026-64128, CVE-2026-64133, CVE-2026-64134, CVE-2026-64135, CVE-2026-64136, CVE-2026-64137, CVE-2026-64138, CVE-2026-64144, CVE-2026-64147, CVE-2026-64148, CVE-2026-64153, CVE-2026-64155, CVE-2026-64163, CVE-2026-64165, CVE-2026-64166, CVE-2026-64168, CVE-2026-64170, CVE-2026-64173, CVE-2026-64174, CVE-2026-64177, CVE-2026-64178, CVE-2026-64179, CVE-2026-64180, CVE-2026-64182, CVE-2026-64183, CVE-2026-64184, CVE-2026-64185, CVE-2026-64214, CVE-2026-64217, CVE-2026-64218, CVE-2026-64219, CVE-2026-64220, CVE-2026-64221, CVE-2026-64225, CVE-2026-64231, CVE-2026-64518 |
| Authoritative release date | 2026-09-21 13:04:29.881238 UTC |
| Authority revision date | 2026-09-21 13:04:29.881238 UTC |
| Affected versions | The Ubuntu releases and packages enumerated in USN-8729-3: Ubuntu 24.04 LTS (noble), Ubuntu 22.04 LTS (jammy). |
| Fixed version | jammy: linux-gcp-6.8 6.8.0-1067.75~22.04.1 / noble: linux-ibm 6.8.0-1064.65 / noble: linux-xilinx 6.8.0-1036.37 |
| CVSS base score | Not provided by the authority |
| CVSS severity | Not provided by the authority |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
Several security issues were fixed in the Linux kernel. 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.
What To Validate Now
- Inventory. Record jammy hosts using linux-gcp-6.8 and noble hosts using linux-ibm or linux-xilinx, including running kernels, installed packages, third-party modules, and workload owners.
- Establish applicability. Use
6.8.0-1067.75~22.04.1for jammy linux-gcp-6.8,6.8.0-1064.65for noble linux-ibm, and6.8.0-1036.37for noble linux-xilinx. Do not transfer a build between flavors or distributions. - Remediate. Apply jammy: linux-gcp-6.8 6.8.0-1067.75~22.04.1 / noble: linux-ibm 6.8.0-1064.65 / noble: linux-xilinx 6.8.0-1036.37 through the supported vendor or project channel, following the current advisory and change-control requirements.
- Validate. After reboot, verify the active kernel against the correct flavor's fixed build, check required modules and device/network/storage functions, and test representative workloads before updating more hosts.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Use the exact supported release stream and repository. Test dependencies, clusters, integrations, and rollback before broad deployment; a CVSS rating or reachable feature is not evidence of exploitation.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
