PT-2026-72649

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix refcount leak when updating the sk ctx Currently update sk ctx transfers the plabel reference, unfortunately it is also unconditionally put in the caller. Ideally we would make the caller conditionally put the...

PT-2026-72646

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL pointer dereference in unpack pdb pdb-dfa could be NULL if unpack dfa fails, causing a NULL pointer dereference...

PT-2026-72647

In the Linux kernel, the following vulnerability has been resolved: apparmor: aa label alloc use aa label free on alloc failure aa label alloc allocates a secid before allocating or taking the label proxy. If the later proxy step fails, the error path only freed the label memory, leaking any...

PT-2026-72648

In the Linux kernel, the following vulnerability has been resolved: apparmor: check label build before no new privs test aa change profile builds a replacement label with fn label build in scope before the no new privs subset check. The build helper can fail and return NULL or an ERR PTR, but the...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: It is ensured that the DFA start states are within the valid range when unpackpdb is called. The start states are read from untrusted data and used as indexes into the DFA state tables. The aadfanext function call in...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Fixed a race condition related to the dereference of rawdata objects. There is a race condition that leads to a “use-after-free” situation: Since the rawdata inodes are not counted for their references, an attacker can...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Fixed the race condition between freeing data and accessing it through the file system. AppArmor originally placed a reference to private data after removing the original entry from the file system. However, the inode m...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: AppArmor: Fixing differential encoding verification Differential encoding allows loops to be created if it is abused. To prevent this, the unpacking process should verify that the diff-encode chain terminates. Unfortunately, t...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: AppArmor: Fixed and optimized the creation of tables from potentially unaligned memory. The source code may come from user space, and it might be unaligned. Try to optimize the copying process by avoiding unaligned memory...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Allow AppArmor to handle unaligned DFA tables. DFA tables can originate from the kernel or user space, and 8-byte alignment is not always guaranteed. This may lead to unaligned memory accesses on various architectures...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Avoid per-cpu hold underflow in aagetbuffer. When aagetbuffer retrieves data from the per-cpu list, it conditionally decreases cache-hold. If hold reaches 0 while count remains non-zero, the unsigned decrement wraps to...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Apparmor: Fixed a side-effect bug in the use of the matchchar macro. The matchchar macro evaluates its character parameter multiple times when traversing differential encoding chains. When invoked with str++, the string pointe...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: The recursive profile removal method has been replaced with an iterative approach. The profile removal code uses recursion when removing nested profiles, which can lead to kernel stack exhaustion and system crashes...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: AppArmor: Fixed the rlimit settings for posix cpu timers. posix cpu timers require an additional step beyond simply setting rlimit. The code should be refactored so it’s clear which code is setting the limits, and the posix cp...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Apparmor: Fixed a missing bounds check on the DEFAULT table in verifydfa. The verifydfa function only checks the bounds of DEFAULTTABLE when the state is not differentially encoded. When the verification loop traverses the...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Fixed the issue by limiting the number of levels of policy namespaces. Currently, the number of policy namespaces is not bounded, relying on the user namespace limits. However, policy namespaces are not strictly tied to...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: AppArmor: Fixed an issue where invalid dereferencing of rawdata occurred when exportbinary was not set. If the exportbinary parameter is disabled at runtime, profiles that were loaded before that time will still have their...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: A memory leak was fixed in the verifyheader function. The function sets ns = NULL on every call, causing a memory leak for the namespace string allocated in previous iterations when multiple profiles are unpacked. This...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: AppArmor: Fixed a 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 value of...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: AppArmor: Fixed the issue where an unprivileged local user could perform privileged policy management. An unprivileged local user can load, replace, and remove policies by opening the AppArmor interfaces. This can be achieved...