ZDI flags CVSS 9.0 race-condition RCE in Linux KSMBD
A protocol-handler mismatch between request enqueue and dequeue can leak kernel heap memory and open an out-of-bounds write path.
By oopsKernel & Low-Level
Linux VFS stops stuck unmounts from freezing the host
Josef Bacik’s series makes sync, drop_caches, quotas, and remounts skip or killably wait on dying superblocks instead of hanging uninterruptibly behind one bad umount.
By oopsVirtual swap collides with what memory.swap has always meant
Patches that let zswap run without a disk swapfile force a userspace-visible rewrite of cgroup swap accounting, and production operators are not sure the break is worth it.
By kexecLinux gains virtual swap so zswap works without a swapfile
Nhat Pham’s vswap layer decouples swap slots from disk, with on-demand physical fallback and cgroup accounting that only charges real backing.
By kexecKernel adds agent skills for Fixes tags and stable backports
Sasha Levin’s series gives coding assistants shared recipes for wrong Fixes tags, stable eligibility, sibling bugs, and commit messages.
By kexecKernel RFC proposes native UUID and GUID user IDs
A 41-patch series from Jan Koester would let Linux processes, files, and credentials carry 128-bit directory identities without mapping them to fragile 32-bit numbers.
By oopsBPF verifier gains 32-bit loop analysis, ships with pointer bug
Eduard Zingerman’s scalar-evolution work cuts verification cost sharply, but 32-bit pointer latches can undercount iterations and mis-bound memory access.
By oopsKernel tool will stop CCing LKML on nearly every patch
get_maintainer will treat linux-kernel as a fallback only, aiming to cut the list’s duplicate traffic by roughly 90 percent.
By oopsLinux RDMA core gains Ultra Ethernet reliable unconnected verbs
Eric Davis of Broadcom proposes the generic uverbs ABI so UET devices can land without reinventing jobs, wide keys, and ready-to-send queue pairs in every driver.
By oopsPAGEMAP_SCAN fix pins mm to stop unprivileged UAF
A missing mm_users hold let concurrent exit free a hugetlb VMA lock under a live page-table walk.
By oopsAMD KVM nested-virt bug corrupted host memory on live migration
A fix already in mainline, once labeled benign, stops Windows VBS guests from smashing host RAM on 6.18 KVM hosts.
By kexecLinux RFC lets hot page-cache reads skip folio refcounts
Meta reworks a Linus Torvalds idea so multi-CPU small reads stop bouncing the same folio's reference count.
By kexecvhost IOTLB path leaks kernel memory via unchecked user access
A CAP_NET_ADMIN controller can aim vdpa_sim virtqueues at kernel addresses and read two bytes per kick after a missing access_ok check.
By oopsKernel scripts/ set to shed its last Perl utilities
An RFC finishes converting all seventeen tools there to Python 3, stdlib only.
By kexecDriver core deadlock freezes probe on sysfs read since 5.9
A world-readable waiting_for_supplier attribute can permanently hang both the reader and device probe on success.
By kexecBPF proposes r3-based unwinding for Rust and C++ cleanup
Alexei Starovoitov’s series lets panics and exceptions run destructors without unwind tables, new uapi, or libbpf changes.
By oopsLinux mremap shrink-and-move leaks commit charge since 6.15
Unprivileged callers can permanently inflate Committed_AS and starve the system under strict overcommit.
By oopsKernfs patch ends multi-minute cgroupfs stalls under OOM
Meta moves inode allocation off the shared kernfs lock after fleet hangs that blocked oomd and init while memory-max containers reclaimed.
By kexecBPF gets bulk memory-safety and lifetime fixes
A 38-patch series closes use-after-free, RCU, and buffer-bound bugs across the verifier, maps, iterators, and networking helpers.
By oopsLinux tightens virtio-net checksum handling against untrusted devices
Ingress path now validates partial checksum metadata so guest or hardware edits cannot leave the stack with two views of the same packet.
By kexecKernel gains LLM agent skills for Fixes tags and stable backports
Sasha Levin shares workflows meant to cut wrong Fixes tags and missed stable markings, and tightens the docs those tags depend on.
By kexecKernel netdev sees v17 of in-kernel QUIC transport stack
Xin Long's 15-part series adds sockets, crypto, paths, and congestion control so Linux can run QUIC natively over UDP.
By kexecKernel adds atomic mkdir-and-open via O_CREAT|O_DIRECTORY
open(2) can create a directory and return a pinning file descriptor in one step, closing a long-standing race when setting up directory trees.
By oopsKernel series cuts CPU hotplug time 21x on large Xeon systems
Patches remove obsolete cache flushes and fix quadratic scheduler and accounting work that dominated sequential online and offline on high-core x86 servers.
By kexecMGLRU gains frequency-guided promotion in v4 patch series
Kairui Song’s Multi-Gen LRU work promotes hot pages on access rather than waiting for eviction feedback, cutting I/O and reclaim pressure on many workloads.
By kexecKernel adds Clang attribute to force explicit struct init
Mandatory seq_file callbacks are the first annotated fields so missing initializers become compile-time warnings.
By kexecBPF gains unwind cleanup pads for Rust-style resource release
Yonghong Song's bpf-next series runs landing-pad cleanups on bpf_unwind so frames that own locks or kptrs can tear down instead of being discarded.
By oopsKernel fixes MADV_COLD race that could drop dirty THP data
Non-atomic young-bit clearing on transparent huge pages could lose concurrent writes and let reclaim discard still-dirty anonymous memory.
By oopsScheduler race drops wakeups, leaves runnable tasks stranded idle
RCU torture testing exposed a lost-reschedule bug when queued tasks change scheduling class, fixed after diagnosis by AMD and kernel scheduler maintainers.
By kexecKernel maintainers move to drop Assisted-by AI attribution tag
Summit consensus and maintainer fatigue push the Linux project to scrap a short-lived requirement that patches disclose LLM help.
By kexecCeph client UAF fixes stall after maintainer rejection
Patches for CVE-2026-89654 and a session teardown race sit outside mainline while the author says dozens of other Ceph fixes went unmerged.
By kexecTorvalds posts Linux page refcount scalability series
After years of incomplete fixes for buffered read bottlenecks, Linus Torvalds mails a new approach he refined with LLM help ahead of the maintainer summit.
By oopsPCI core gains Live Update support for kexec device continuity
David Matlack’s v10 series lets selected PCI endpoints keep DMA running across a host kernel upgrade without topology or routing changes.
By oopsKernel to drop Assisted-by LLM tag after summit consensus
Maintainers found the mandatory attribution rarely used and uninformative, and prefer tool-use detail in cover letters instead.
By kexecLinux 6.12-stable fixes packet TX ring overflow that can panic
A CAP_NET_RAW local user could wrap a signed byte counter and trigger a kernel BUG during AF_PACKET sends.
By kexecKernel RFC stops filesystems flipping SB_RDONLY after errors
Christian Brauner’s series converts remaining filesystems to private emergency-ro state so freeze, thaw, and emergency remount stop hanging or warning.
By kexecLinux fixes page-table accounting on memory hot-remove
Constructor and destructor mismatches left NR_PAGETABLE wrong when freeing hot-removed tables on x86, arm64, and RISC-V.
By kexecKernel mm series kills VM_SPECIAL, clarifies VMA flag rules
Lorenzo Stoakes proposes 38 patches that replace overloaded special-flag checks with explicit predicates for what core mm owns and can merge.
By oopsXFS online scrub gets 21st batch of LLM-assisted repair fixes
Darrick J. Wong’s latest series hardens free-space, directory-tree, quota, and xattr repair paths that could mis-repair or overrun buffers.
By oopsKernel isolates skb data allocations against UAF heap sprays
Kees Cook’s kmem_buckets series, capped by a Pedro Falcato networking change, gives socket-buffer payloads their own slab caches when slab buckets are enabled.
By oops