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USN-8266-1 Not scored

linux, linux-aws, linux-aws-fips, linux-aws-hwe, linux-azure-4.15, linux-fips, linux-gcp, linux-gcp-4.15, linux-gcp-fips, linux-hwe, linux-kvm, linux-oracle vulnerabilities

Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM). An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853, CVE-2026-23268, CVE-2026-23269, CVE-2026-23403, CVE-2026-23404, CVE-2026-23405, CVE-2026-23410, CVE-2026-23411) 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: - GPU drivers; - Network drivers; - Sun RPC protocol; - XFRM subsystem; (CVE-2024-27388, CVE-2024-46816, CVE-2024-49938, CVE-2024-50008, CVE-2024-50142, CVE-2026-23209)

Exploit probability Not scored
Published May 11, 2026
Required by Not available
Last source change August 6, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:Pro:16.04:LTS linux-aws-hwe

111 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-gcp

134 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-hwe

162 explicit affected versions

Ubuntu:Pro:18.04:LTS linux

148 explicit affected versions

Ubuntu:Pro:18.04:LTS linux-aws

134 explicit affected versions

Ubuntu:Pro:18.04:LTS linux-azure-4.15

87 explicit affected versions

Ubuntu:Pro:18.04:LTS linux-gcp-4.15

88 explicit affected versions

Ubuntu:Pro:18.04:LTS linux-kvm

126 explicit affected versions

Ubuntu:Pro:18.04:LTS linux-oracle

113 explicit affected versions

Ubuntu:Pro:FIPS-updates:18.04:LTS linux-aws-fips

89 explicit affected versions

Ubuntu:Pro:FIPS-updates:18.04:LTS linux-fips

92 explicit affected versions

Ubuntu:Pro:FIPS-updates:18.04:LTS linux-gcp-fips

64 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities USN-8266-1

Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM). An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853, CVE-2026-23268, CVE-2026-23269, CVE-2026-23403, CVE-2026-23404, CVE-2026-23405, CVE-2026-23410, CVE-2026-23411) 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: - GPU drivers; - Network drivers; - Sun RPC protocol; - XFRM subsystem; (CVE-2024-27388, CVE-2024-46816, CVE-2024-49938, CVE-2024-50008, CVE-2024-50142, CVE-2026-23209)

View original source

05 / REFERENCES

Further evidence