USN-8094-5: Linux kernel (Raspberry Pi) 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...

CVE-2026-23403

A flaw was found in AppArmor within the Linux kernel. This vulnerability, located in the verifyheader function, causes a memory leak by incorrectly handling namespace strings when multiple security profiles are processed. This can lead to a gradual depletion of system memory, potentially impactin...

CVE-2026-23404

A flaw was found in the Linux kernel's AppArmor security module. A local user could trigger a denial of service by initiating a recursive profile removal operation with deeply nested profiles. This recursive process can lead to kernel stack exhaustion, causing the system to crash...

EUVD-2026-17837

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

CVE-2026-23408

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

CVE-2026-23408

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

UBUNTU-CVE-2026-23408

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

CVE-2026-23408

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, , name; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 1095 nsna...

CVE-2026-23408

The CVE-2026-23408 issue affects the Linux kernel AppArmor module. The root cause was a double free of ns_name in aa_replace_profiles(): ns_name could be NULLed after it had been transferred from ent->ns_name, but ent->ns_name was freed later, and then freed again when kfree(ns_name). The p...

CVE-2026-23408 apparmor: Fix double free of ns_name in aa_replace_profiles()

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

CVE-2026-23408

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of nsname in aareplaceprofiles if nsname is NULL after 1071 error = aaunpackudata, &lh, &nsname; and if ent-nsname contains an nsname in 1089 else if ent-nsname then nsname is assigned the ent-nsname 109...

CVE-2026-23404 apparmor: replace recursive profile removal with iterative approach

In the Linux kernel, the following vulnerability has been resolved: apparmor: replace recursive profile removal with iterative approach The profile removal code uses recursion when removing nested profiles, which can lead to kernel stack exhaustion and system crashes. Reproducer: $ pf='a'; for i=...

CVE-2026-23404

CVE-2026-23404 affects the Linux kernel AppArmor profile management. The issue arises from recursive profile removal in the AppArmor code path; nested profiles could trigger deep recursion, risking kernel stack exhaustion and system crashes. The connected documents confirm the root cause is the r...

CVE-2026-23403 apparmor: fix memory leak in verify_header

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verifyheader The function sets ns = NULL on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks namespace consistency checki...

CVE-2026-23403

CVE-2026-23403 concerns the AppArmor memory leak in Linux kernel’s verify_header. The issue arises because a function sets *ns = NULL on every call, leaking the previously allocated namespace string across successive profile unpackings and causing namespace consistency checks to see NULL for *ns....

CVE-2026-23403 apparmor: fix memory leak in verify_header

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verifyheader The function sets ns = NULL on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks namespace consistency checki...

Linux kernel 安全漏洞

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from a double deallocation issue in the aareplaceprofiles function...

PT-2026-29486

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contained a memory leak in the verify header function within the AppArmor subsystem. The function incorrectly set ns to NULL on each call, leading to a memory leak of th...

PT-2026-29811

Name of the Vulnerable Software and Affected Versions: Ferret versions prior to 2.0.0-alpha.4 Description: Ferret is a declarative system for working with web data. A path traversal vulnerability exists in the IO::FS::WRITE standard library function, allowing a malicious website to write arbitrar...

PT-2026-29491

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw within the apparmor subsystem related to a double free of ns name in the aa replace profiles function. Specifically, if ns name is NULL after unpacking...