Ubuntu USN-8726-4 Fixes Linux kernel Vulnerabilities

Quick Answer

Ubuntu's USN-8726-4 updates two Ubuntu 26.04 kernel families: linux-azure to 7.0.0-1014.14 and linux-oracle to 7.0.0-1011.11. Use the binary packages for the installed flavor, not both families by default. A reboot and any required third-party-module rebuilds are part of the update.

Last verified: 2026-09-22 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.

Scope And Authority

Product scope	Linux kernel packages on Ubuntu 26.04 LTS (resolute)
Advisory	USN-8726-4
CVEs	CVE-2025-10263, CVE-2026-52908, CVE-2026-52909, CVE-2026-52910, CVE-2026-52917, CVE-2026-52929, CVE-2026-52930, CVE-2026-52935, CVE-2026-52938, CVE-2026-52939, CVE-2026-52940, CVE-2026-52942, CVE-2026-52947, CVE-2026-52948, CVE-2026-53132, CVE-2026-53133, CVE-2026-53134, CVE-2026-53135, CVE-2026-53136, CVE-2026-53137, CVE-2026-53138, CVE-2026-53139, CVE-2026-53140, CVE-2026-53141, CVE-2026-53142, CVE-2026-53143, CVE-2026-53144, CVE-2026-53145, CVE-2026-53146, CVE-2026-53147, CVE-2026-53148, CVE-2026-53149, CVE-2026-53150, CVE-2026-53152, CVE-2026-53153, CVE-2026-53154, CVE-2026-53155, CVE-2026-53156, CVE-2026-53157, CVE-2026-53158, CVE-2026-53159, CVE-2026-53160, CVE-2026-53161, CVE-2026-53162, CVE-2026-53163, CVE-2026-53164, CVE-2026-53165, CVE-2026-53167, CVE-2026-53168, CVE-2026-53169, CVE-2026-53170, CVE-2026-53171, CVE-2026-53172, CVE-2026-53173, CVE-2026-53177, CVE-2026-53178, CVE-2026-53179, CVE-2026-53180, CVE-2026-53181, CVE-2026-53182, CVE-2026-53183, CVE-2026-53184, CVE-2026-53185, CVE-2026-53187, CVE-2026-53188, CVE-2026-53189, CVE-2026-53190, CVE-2026-53191, CVE-2026-53192, CVE-2026-53193, CVE-2026-53194, CVE-2026-53195, CVE-2026-53196, CVE-2026-53197, CVE-2026-53198, CVE-2026-53199, CVE-2026-53200, CVE-2026-53201, CVE-2026-53202, CVE-2026-53203, CVE-2026-53204, CVE-2026-53205, CVE-2026-53206, CVE-2026-53207, CVE-2026-53208, CVE-2026-53209, CVE-2026-53210, CVE-2026-53211, CVE-2026-53213, CVE-2026-53214, CVE-2026-53217, CVE-2026-53218, CVE-2026-53219, CVE-2026-53220, CVE-2026-53222, CVE-2026-53223, CVE-2026-53226, CVE-2026-53227, CVE-2026-53229, CVE-2026-53230, CVE-2026-53231, CVE-2026-53232, CVE-2026-53233, CVE-2026-53234, CVE-2026-53235, CVE-2026-53236, CVE-2026-53237, CVE-2026-53238, CVE-2026-53239, CVE-2026-53240, CVE-2026-53241, CVE-2026-53242, CVE-2026-53243, CVE-2026-53244, CVE-2026-53245, CVE-2026-53248, CVE-2026-53249, CVE-2026-53250, CVE-2026-53251, CVE-2026-53252, CVE-2026-53253, CVE-2026-53254, CVE-2026-53255, CVE-2026-53256, CVE-2026-53257, CVE-2026-53258, CVE-2026-53259, CVE-2026-53261, CVE-2026-53262, CVE-2026-53263, CVE-2026-53264, CVE-2026-53265, CVE-2026-53266, CVE-2026-53267, CVE-2026-53268, CVE-2026-53269, CVE-2026-53270, CVE-2026-53271, CVE-2026-53272, CVE-2026-53273, CVE-2026-53274, CVE-2026-53275, CVE-2026-53276, CVE-2026-53325, CVE-2026-53326, CVE-2026-53327, CVE-2026-53328, CVE-2026-53329, CVE-2026-53330, CVE-2026-53331, CVE-2026-53332, CVE-2026-53333, CVE-2026-53334, CVE-2026-53335, CVE-2026-53336, CVE-2026-53337, CVE-2026-53338, CVE-2026-53339, CVE-2026-53340, CVE-2026-53341, CVE-2026-53342, CVE-2026-53343, CVE-2026-53344, CVE-2026-53345, CVE-2026-53346, CVE-2026-53347, CVE-2026-53348, CVE-2026-53349, CVE-2026-53350, CVE-2026-53351, CVE-2026-53352, CVE-2026-53353, CVE-2026-53354, CVE-2026-53355, CVE-2026-53356, CVE-2026-53361, CVE-2026-53362, CVE-2026-53363, CVE-2026-53366, CVE-2026-53381, CVE-2026-53382, CVE-2026-53383, CVE-2026-53384, CVE-2026-53385, CVE-2026-53386, CVE-2026-53387, CVE-2026-53388, CVE-2026-53389, CVE-2026-53390, CVE-2026-53391, CVE-2026-53392, CVE-2026-53393, CVE-2026-53394, CVE-2026-53395, CVE-2026-53396, CVE-2026-53397, CVE-2026-53398, CVE-2026-53399, CVE-2026-53400, CVE-2026-53401, CVE-2026-53402, CVE-2026-53403, CVE-2026-63794, CVE-2026-63795, CVE-2026-63796, CVE-2026-63797, CVE-2026-63798, CVE-2026-63799, CVE-2026-63800, CVE-2026-63801, CVE-2026-63802, CVE-2026-63803, CVE-2026-63804, CVE-2026-63805, CVE-2026-63806, CVE-2026-63807, CVE-2026-63808, CVE-2026-63809, CVE-2026-63810, CVE-2026-63811, CVE-2026-63812, CVE-2026-63813, CVE-2026-63814, CVE-2026-63815, CVE-2026-63816, CVE-2026-63817, CVE-2026-63818, CVE-2026-63819, CVE-2026-63820, CVE-2026-63821, CVE-2026-63822, CVE-2026-63823, CVE-2026-63824, CVE-2026-63825, CVE-2026-63826, CVE-2026-63827, CVE-2026-63828, CVE-2026-63829, CVE-2026-63830, CVE-2026-63831, CVE-2026-63832, CVE-2026-63833, CVE-2026-63834, CVE-2026-63835, CVE-2026-63836, CVE-2026-63867, CVE-2026-63868, CVE-2026-63869, CVE-2026-63870, CVE-2026-63871, CVE-2026-63873, CVE-2026-63874, CVE-2026-64187, CVE-2026-64188, CVE-2026-64189, CVE-2026-64191, CVE-2026-64192, CVE-2026-64205, CVE-2026-64206, CVE-2026-64207, CVE-2026-64244, CVE-2026-64245, CVE-2026-64246, CVE-2026-64247, CVE-2026-64249, CVE-2026-64251, CVE-2026-64253, CVE-2026-64254, CVE-2026-64255, CVE-2026-64256, CVE-2026-64258, CVE-2026-64259, CVE-2026-64260, CVE-2026-64261, CVE-2026-64262, CVE-2026-64263, CVE-2026-64264, CVE-2026-64265, CVE-2026-64266, CVE-2026-64267, CVE-2026-64268, CVE-2026-64269, CVE-2026-64270, CVE-2026-64271, CVE-2026-64272, CVE-2026-64273, CVE-2026-64274, CVE-2026-64275, CVE-2026-64276, CVE-2026-64277, CVE-2026-64278, CVE-2026-64279, CVE-2026-64280, CVE-2026-64282, CVE-2026-64283, CVE-2026-64284, CVE-2026-64285, CVE-2026-64286, CVE-2026-64287, CVE-2026-64288, CVE-2026-64289, CVE-2026-64290, CVE-2026-64291, CVE-2026-64292, CVE-2026-64293, CVE-2026-64294, CVE-2026-64295, CVE-2026-64296, CVE-2026-64297, CVE-2026-64298, CVE-2026-64299, CVE-2026-64300, CVE-2026-64301, CVE-2026-64302, CVE-2026-64303, CVE-2026-64304, CVE-2026-64305, CVE-2026-64306, CVE-2026-64307, CVE-2026-64308, CVE-2026-64309, CVE-2026-64310, CVE-2026-64312, CVE-2026-64313, CVE-2026-64314, CVE-2026-64315, CVE-2026-64316, CVE-2026-64317, CVE-2026-64318, CVE-2026-64319, CVE-2026-64320, CVE-2026-64321, CVE-2026-64322, CVE-2026-64323, CVE-2026-64324, CVE-2026-64325, CVE-2026-64326, CVE-2026-64327, CVE-2026-64328, CVE-2026-64329, CVE-2026-64330, CVE-2026-64331, CVE-2026-64332, CVE-2026-64333, CVE-2026-64334, CVE-2026-64335, CVE-2026-64336, CVE-2026-64337, CVE-2026-64338, CVE-2026-64339, CVE-2026-64340, CVE-2026-64341, CVE-2026-64342, CVE-2026-64343, CVE-2026-64344, CVE-2026-64345, CVE-2026-64346, CVE-2026-64347, CVE-2026-64348, CVE-2026-64350, CVE-2026-64351, CVE-2026-64352, CVE-2026-64353, CVE-2026-64354, CVE-2026-64355, CVE-2026-64356, CVE-2026-64357, CVE-2026-64358, CVE-2026-64359, CVE-2026-64360, CVE-2026-64361, CVE-2026-64362, CVE-2026-64363, CVE-2026-64364, CVE-2026-64365, CVE-2026-64366, CVE-2026-64367, CVE-2026-64368, CVE-2026-64369, CVE-2026-64370, CVE-2026-64371, CVE-2026-64372, CVE-2026-64373, CVE-2026-64374, CVE-2026-64375, CVE-2026-64376, CVE-2026-64377, CVE-2026-64378, CVE-2026-64379, CVE-2026-64380, CVE-2026-64381, CVE-2026-64382, CVE-2026-64383, CVE-2026-64384, CVE-2026-64385, CVE-2026-64386, CVE-2026-64387, CVE-2026-64388, CVE-2026-64389, CVE-2026-64390, CVE-2026-64391, CVE-2026-64392, CVE-2026-64393, CVE-2026-64394, CVE-2026-64395, CVE-2026-64396, CVE-2026-64397, CVE-2026-64398, CVE-2026-64399, CVE-2026-64400, CVE-2026-64401, CVE-2026-64402, CVE-2026-64403, CVE-2026-64404, CVE-2026-64405, CVE-2026-64406, CVE-2026-64407, CVE-2026-64408, CVE-2026-64409, CVE-2026-64410, CVE-2026-64411, CVE-2026-64412, CVE-2026-64413, CVE-2026-64414, CVE-2026-64415, CVE-2026-64416, CVE-2026-64417, CVE-2026-64418, CVE-2026-64419, CVE-2026-64420, CVE-2026-64421, CVE-2026-64422, CVE-2026-64423, CVE-2026-64424, CVE-2026-64425, CVE-2026-64426, CVE-2026-64428, CVE-2026-64429, CVE-2026-64430, CVE-2026-64432, CVE-2026-64433, CVE-2026-64434, CVE-2026-64435, CVE-2026-64436, CVE-2026-64438, CVE-2026-64439, CVE-2026-64440, CVE-2026-64441, CVE-2026-64442, CVE-2026-64443, CVE-2026-64444, CVE-2026-64445, CVE-2026-64446, CVE-2026-64447, CVE-2026-64448, CVE-2026-64449, CVE-2026-64450, CVE-2026-64451, CVE-2026-64452, CVE-2026-64453, CVE-2026-64454, CVE-2026-64455, CVE-2026-64456, CVE-2026-64457, CVE-2026-64458, CVE-2026-64459, CVE-2026-64460, CVE-2026-64461, CVE-2026-64462, CVE-2026-64463, CVE-2026-64464, CVE-2026-64465, CVE-2026-64466, CVE-2026-64467, CVE-2026-64468, CVE-2026-64469, CVE-2026-64470, CVE-2026-64471, CVE-2026-64472, CVE-2026-64473, CVE-2026-64474, CVE-2026-64475, CVE-2026-64476, CVE-2026-64477, CVE-2026-64478, CVE-2026-64479, CVE-2026-64480, CVE-2026-64481, CVE-2026-64482, CVE-2026-64483, CVE-2026-64484, CVE-2026-64485, CVE-2026-64486, CVE-2026-64487, CVE-2026-64488, CVE-2026-64489, CVE-2026-64490, CVE-2026-64491, CVE-2026-64492, CVE-2026-64493, CVE-2026-64494, CVE-2026-64495, CVE-2026-64496, CVE-2026-64497, CVE-2026-64499, CVE-2026-64500, CVE-2026-64501, CVE-2026-64502, CVE-2026-64503, CVE-2026-64504, CVE-2026-64505, CVE-2026-64507, CVE-2026-64508, CVE-2026-64509, CVE-2026-64510, CVE-2026-64511, CVE-2026-64512, CVE-2026-64513, CVE-2026-64514, CVE-2026-64529, CVE-2026-64536, CVE-2026-64556, CVE-2026-64588, CVE-2026-64589, CVE-2026-64590, CVE-2026-64591, CVE-2026-64592, CVE-2026-64593, CVE-2026-64594, CVE-2026-64596, CVE-2026-64597, CVE-2026-64598, CVE-2026-64599, CVE-2026-64600, CVE-2026-64601, CVE-2026-64602, CVE-2026-64603, CVE-2026-64604, CVE-2026-68084, CVE-2026-68085, CVE-2026-68087, CVE-2026-68088, CVE-2026-68089, CVE-2026-68090, CVE-2026-68091, CVE-2026-68092, CVE-2026-68459, CVE-2026-68460, CVE-2026-68461, CVE-2026-74584, CVE-2026-80591
Ubuntu advisory publication	2026-09-22 13:19:27.368644 UTC
Recorded source timestamp (historical snapshot)	2026-09-22 13:19:27.368644 UTC
Affected versions	The Ubuntu releases and packages enumerated in USN-8726-4: Ubuntu 26.04 LTS (resolute).
Fixed source-package versions	resolute: linux-azure 7.0.0-1014.14 / resolute: linux-oracle 7.0.0-1011.11
CVSS base score	Not provided by the authority
CVSS severity	Not provided by the authority
Exploitation status	Ubuntu does not state exploitation status in this notice. The CISA KEV catalog lists CVE-2026-53266, added 2026-09-18, and CVE-2026-53362, added 2026-08-27. That establishes exploitation of these CVEs, not that every listed kernel configuration is exploitable or any particular Azure/Oracle host is compromised. Apply relevant CISA triage guidance alongside Ubuntu remediation.

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

1. Inventory. Record Ubuntu 26.04 Azure/Oracle kernel families, exact image and metapackage names, Oracle standard/64k variant where applicable, active builds, and workload owners.
2. Establish applicability. Match the source-version table to the host's actual image packages, including linux-image-7.0.0-1014-azure or the appropriate 1011-oracle variant. The CVE union does not establish that every architecture, driver or subsystem is enabled on each host.
3. Remediate. Apply resolute: linux-azure 7.0.0-1014.14 / resolute: linux-oracle 7.0.0-1011.11 through the supported vendor or project channel, following the current advisory and change-control requirements.
4. Validate. After reboot, verify the correct fixed Azure or Oracle kernel is active and required modules load. Check storage, networking and representative workloads, retaining boot and module-build results.
5. 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

• TechGeeks Security Notice Center
• All Security Notices

Authoritative References

• USN-8726-4

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.