Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: check p-vecbuf for NULL When the PAGEMAPSCAN ioctl is invoked with veclen = 0 and results in pagemapscanbackoutrange, the kernel panics due to a null-ptr-deref. 44.936808 Oops: general protection fault, likely fo...

CVE-2024-53107

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: prevent integer overflow in pagemapscangetargs The "arg-veclen" variable is a u64 that comes from the user at the start of the function. The "arg-veclen sizeofstruct pageregion" multiplication can lead to integer...

CVE-2024-53107

CVE-2024-53107 affects the Linux kernel in fs/proc/task_mmu.c (pagemap_scan_get_args). The issue is an integer overflow: arg->vec_len is read as a u64 from user space and used in the expression arg->vec_len * sizeof(struct page_region), which can wrap. The fix uses size_mul() to perform the...

CVE-2024-53107

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: prevent integer overflow in pagemapscangetargs The "arg-veclen" variable is a u64 that comes from the user at the start of the function. The "arg-veclen sizeofstruct pageregion" multiplication can lead to integer...

CVE-2024-36943

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: fix loss of young/dirty bits during pagemap scan makeuffdwppte was previously doing: pte = ptepgetptep; ptepmodifyprotstartptep; pte = ptemkuffdwppte; ptepmodifyprotcommitptep, pte; But if another thread accessed...

CVE-2024-36943

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: fix loss of young/dirty bits during pagemap scan makeuffdwppte was previously doing: pte = ptepgetptep; ptepmodifyprotstartptep; pte = ptemkuffdwppte; ptepmodifyprotcommitptep, pte; But if another thread accessed...

CVE-2024-36943

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: fix loss of young/dirty bits during pagemap scan makeuffdwppte was previously doing: pte = ptepgetptep; ptepmodifyprotstartptep; pte = ptemkuffdwppte; ptepmodifyprotcommitptep, pte; But if another thread accessed...

CVE-2024-36943

CVE-2024-36943 involves the Linux kernel’s fs/proc/task_mmu code. The race condition occurs in make_uffd_wp_pte() where ptep modifications could race with concurrent accesses, risking loss of the young/dirty bits during pagemap scanning. The incorrect sequence (pte = ptep_get(ptep); ptep_modify_p...

CVE-2024-26617 fs/proc/task_mmu: move mmu notification mechanism inside mm lock

In the Linux kernel, the following vulnerability has been resolved: fs/proc/taskmmu: move mmu notification mechanism inside mm lock Move mmu notification mechanism inside mm lock to prevent race condition in other components which depend on it. The notifier will invalidate memory range. Depending...

CVE-2024-26617

CVE-2024-26617 (Linux kernel) : The vulnerability stems from fs/proc/task_mmu where the mmu notification mechanism was moved inside the mm lock, preventing a race with components that depend on the notifier to invalidate memory ranges. The patch tightens the notifier scope inside the mm lock, red...