Linux kernel security vulnerabilities

A security vulnerability exists in Linux kernel version 6.19. It stems from a naming conflict wherein the loop counter idx declared in foreachinsnprefix shares the same name as a local variable in getsegregoverrideidx, causing the variable to be shadowed. This prevents termination of loops under ...

PT-2026-128171

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Don't consume async PF flags on a kernel PF in NMI context An async PF "page not present" event arrives through the PF vector, and its reason sits in the per-CPU apf reason.flags until kvm handle async pf reads and clear...

CVE-2026-99187

In the Linux kernel, the following vulnerability has been resolved: perf: Fix perfpmumigratecontext leaving events behind perfpmuremove walks the group leaders of a CPU and PMU with perfeventgroupsforcpupmu, removing each one as it goes. perfremovefromcontext takes the leader out of the groups...

CVE-2026-99130

In the Linux kernel, the following vulnerability has been resolved: iouring/cancel: don't spin on local work the task can't run iouringcancelgeneric refuses to sleep while any ring on the exiting task's tctx has local work pending. It assumes the task is that ring's submitter and that the next...

CVE-2026-99211

In the Linux kernel, the following vulnerability has been resolved: netlink: reset skb headers before unicast and multicast filtering Socket filters can use SKFNETOFF and SKFLLOFF to read relative to an skb's network and MAC headers. Netlink producers may reserve headroom without resetting those...

UBUNTU-CVE-2026-99157

In the Linux kernel, the following vulnerability has been resolved: scsi: bsg: Pass replylen to bsgsetupqueue to fit UFS ARPMB replies bsg-lib allocates a 96-byte SCSISENSEBUFFERSIZE reply buffer per job, but struct ufsrpmbreply is 104 bytes: a 40-byte struct ufsbsgreply followed by a 64-byte EHS...

PT-2026-128199

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix race in discovery auth updates Separate configfs opens can concurrently update the discovery AuthMethod parameter. Both callers may free the same value in iscsi update param value, causing a double-free...

PT-2026-128134

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix crash in print graph function event tracing set tracer assigns the flags of the newly selected tracer with: tr-current trace flags = t-flags ? : t-tracer-flags; If the new tracer defines neither static flags nor...

PT-2026-128150

In the Linux kernel, the following vulnerability has been resolved: scsi: bsg: Pass reply len to bsg setup queue to fit UFS ARPMB replies bsg-lib allocates a 96-byte SCSI SENSE BUFFERSIZE reply buffer per job, but struct ufs rpmb reply is 104 bytes: a 40-byte struct ufs bsg reply followed by a...

UBUNTU-CVE-2026-99207

In the Linux kernel, the following vulnerability has been resolved: scsi: target: Disable interrupts while holding delayedcmdlock targetdodelayedwork takes dev-delayedcmdlock with a plain spinlock. It runs from systempercpuwq, so interrupts stay enabled while the lock is held. Every other...

PT-2026-128198

In the Linux kernel, the following vulnerability has been resolved: sched/core: Call wakeup preempt for queued tasks during class change Paul reported recent RCU changes exposed a lost resched where CPU idles with a rcutorture thread waiting while being completely runnable. Dumping the rq state a...

CVE-2026-99186

In the Linux kernel, the following vulnerability has been resolved: x86/insn-eval: Fix shadowed segment index in getsegregoverrideidx Commit 45e1dccc0653 "x86/insn: Simplify foreachinsnprefix" made foreachinsnprefix declare its own loop counter named idx. getsegregoverrideidx keeps its result in ...

PT-2026-128194

In the Linux kernel, the following vulnerability has been resolved: netlink: avoid hashing the network namespace pointer The netlink rhashtable key includes a raw struct net pointer and a user-controlled port ID. Both /proc/net/netlink and socket diagnostics expose the table's bucket order. By...

UBUNTU-CVE-2026-99171

In the Linux kernel, the following vulnerability has been resolved: ntfs3: free the sbi after a grace period If the "nocase" mount option ntfs3 uses custom hash and dentry compare functions. Both access ntfs3 superblock private information in rcu pathwalk. ntfsputsuper and ntfs3killsb drop the in...

UBUNTU-CVE-2026-99178

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Don't consume async PF flags on a kernel PF in NMI context An async PF "page not present" event arrives through the PF vector, and its reason sits in the per-CPU apfreason.flags until kvmhandleasyncpf reads and clears it...

Linux kernel security vulnerabilities

A security vulnerability exists in Linux kernel version 2.6.26. It stems from ocfs2/dlm failing to use dlmrecostatelock during the read of the recovery participant list in debugfs. This allows debugstateprint to traverse the list concurrently with dlmdestroyrecoveryarea, potentially leading to...

CVE-2026-99128

In the Linux kernel, the following vulnerability has been resolved: sctp: validate chunk length in the inqueue parser SCTP chunks always include a four-byte generic header, but sctpinqpop currently accepts shorter declared lengths. A zero-length chunk leaves chunkend at the current header. When...

UBUNTU-CVE-2026-99141

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix crash in printgraphfunctionevent tracingsettracer assigns the flags of the newly selected tracer with: tr-currenttraceflags = t-flags ? : t-tracer-flags; If the new tracer defines neither static flags nor default...

PT-2026-128095

In the Linux kernel, the following vulnerability has been resolved: ntfs: take invalidate lock in ntfs setattr size ntfs setattr size updates i size and resizes the on-disk attribute without holding mapping-invalidate lock. Page faults take the lock shared, so a fault racing the resize can resolv...

UBUNTU-CVE-2026-99150

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: don't drop the runtime PM reference twice in amdgpugpr amdgpudebugfsgprread drops its runtime PM reference right after reading the wave registers. When copying them to userspace fails, it jumps to the err label, which...