CVE-2026-74599

CVE-2026-74599 is a race condition in the Linux kernel 's mm/ptdump subsystem. Previous fixes established that kernel page table freeing occurs while holding an mmap read lock on init_mm , but x86 and arm64 architectures can perform a ptdump over a non-init_mm via ptdump_walk_pgd(). Since kernel ...

CVE-2026-74599 mm/ptdump: always stabilise against page table freeing using init_mm

In the Linux kernel, the following vulnerability has been resolved: mm/ptdump: always stabilise against page table freeing using initmm Previous commits have established the invariant that kernel page table freeing is performed while an mmap read lock on initmm is held, which fixes races between...

CVE-2026-74599

In the Linux kernel, the following vulnerability has been resolved: mm/ptdump: always stabilise against page table freeing using initmm Previous commits have established the invariant that kernel page table freeing is performed while an mmap read lock on initmm is held, which fixes races between...

CVE-2026-74599 mm/ptdump: always stabilise against page table freeing using init_mm

In the Linux kernel, the following vulnerability has been resolved: mm/ptdump: always stabilise against page table freeing using initmm Previous commits have established the invariant that kernel page table freeing is performed while an mmap read lock on initmm is held, which fixes races between...

CVE-2026-74598 ipv6: fix Route Information option length validation

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix Route Information option length validation rt6routercv validates the Route Information option RFC 4191 length against the prefix length, but both checks are off by one. rinfo-length is the ND option length in units of 8...

CVE-2026-74598

CVE-2026-74598 is an off-by-one length validation error in the Linux kernel's rt6_route_rcv() function, which processes IPv6 Route Information options (RFC 4191) from Router Advertisements. The code accepts length >= 2 and length >= 1 where the RFC requires stricter minimums, causing ipv6_a...

CVE-2026-74598

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix Route Information option length validation rt6routercv validates the Route Information option RFC 4191 length against the prefix length, but both checks are off by one. rinfo-length is the ND option length in units of 8...

EUVD-2026-64535

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix Route Information option length validation rt6routercv validates the Route Information option RFC 4191 length against the prefix length, but both checks are off by one. rinfo-length is the ND option length in units of 8...

CVE-2026-74598 ipv6: fix Route Information option length validation

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix Route Information option length validation rt6routercv validates the Route Information option RFC 4191 length against the prefix length, but both checks are off by one. rinfo-length is the ND option length in units of 8...

EUVD-2026-64530

In the Linux kernel, the following vulnerability has been resolved: schedext: Take cgrouplock first in scxcgrouplock scxcgrouplock write-locks scxcgroupopsrwsem and then takes cgrouplock, which can deadlock through kernfs: scx enable/disable cgroup rmdir cpu.weight write ------------------...

CVE-2026-74593 sched_ext: Take cgroup_lock() first in scx_cgroup_lock()

In the Linux kernel, the following vulnerability has been resolved: schedext: Take cgrouplock first in scxcgrouplock scxcgrouplock write-locks scxcgroupopsrwsem and then takes cgrouplock, which can deadlock through kernfs: scx enable/disable cgroup rmdir cpu.weight write ------------------...

CVE-2026-74593 sched_ext: Take cgroup_lock() first in scx_cgroup_lock()

In the Linux kernel, the following vulnerability has been resolved: schedext: Take cgrouplock first in scxcgrouplock scxcgrouplock write-locks scxcgroupopsrwsem and then takes cgrouplock, which can deadlock through kernfs: scx enable/disable cgroup rmdir cpu.weight write ------------------...

CVE-2026-74593

In the Linux kernel, the following vulnerability has been resolved: schedext: Take cgrouplock first in scxcgrouplock scxcgrouplock write-locks scxcgroupopsrwsem and then takes cgrouplock, which can deadlock through kernfs: scx enable/disable cgroup rmdir cpu.weight write ------------------...

CVE-2026-74593

This CVE affects the Linux kernel 's sched_ext subsystem. The root cause is a lock ordering bug in scx_cgroup_lock(), which acquires scx_cgroup_ops_rwsem (write) before cgroup_lock(). This ordering can create a deadlock through kernfs when concurrent operations on cgroup rmdir and cpu.weight writ...

EUVD-2026-64528

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: filemapaddfolio restore index before retrying In filemapaddfolio's split-a-conflict loop, xassetorder is applied repeatedly: each application modifies xas.xaindex, rounding it down according to the splitorder attempte...

CVE-2026-74591

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: filemapaddfolio restore index before retrying In filemapaddfolio's split-a-conflict loop, xassetorder is applied repeatedly: each application modifies xas.xaindex, rounding it down according to the splitorder attempte...

CVE-2026-74591 mm/filemap: __filemap_add_folio() restore index before retrying

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: filemapaddfolio restore index before retrying In filemapaddfolio's split-a-conflict loop, xassetorder is applied repeatedly: each application modifies xas.xaindex, rounding it down according to the splitorder attempte...

CVE-2026-74591 mm/filemap: __filemap_add_folio() restore index before retrying

In the Linux kernel, the following vulnerability has been resolved: mm/filemap: filemapaddfolio restore index before retrying In filemapaddfolio's split-a-conflict loop, xassetorder is applied repeatedly: each application modifies xas.xaindex, rounding it down according to the splitorder attempte...

CVE-2026-74591

CVE-2026-74591 is a bug in the Linux kernel 's mm/filemap subsystem, specifically in __filemap_add_folio(). In the split-a-conflict loop, repeated calls to xas_set_order() round down xas.xa_index. When a GFP_NOWAIT allocation fails and the lock is dropped for retry via xas_nomem(), a concurrent t...

CVE-2026-74587 sctp: fix use-after-free of cached ASCONF chunk

In the Linux kernel, the following vulnerability has been resolved: sctp: fix use-after-free of cached ASCONF chunk addiplastasconf caches the outstanding outbound ASCONF chunk. The normal ASCONF-ACK completion path releases the chunk and clears the pointer. However, sctpasconfqueueteardown...