CVE-2023-52991

CVE-2023-52991 affects the Linux kernel’s skb_segment_list path. The issue stems from a prior change: net: Support GRO/GSO fraglist chaining, which can cause frag_list to be NULL if it is pulled into the linear area during processing. This condition leads to a NULL pointer dereference in skb_segm...

CVE-2023-52975 scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsitcp: Fix UAF during logout when accessing the shost ipaddress Bug report and analysis from Ding Hui. During iSCSI session logout, if another task accesses the shost ipaddress attr, we can get a KASAN UAF report like...

CVE-2022-49746

In the Linux kernel, the following vulnerability has been resolved: dmaengine: imx-sdma: Fix a possible memory leak in sdmatransferinit If the function sdmaloadcontext fails, the sdmadesc will be freed, but the allocated desc-bd is forgot to be freed. We already met the sdmaloadcontext failure ca...

CVE-2022-49740

CVE-2022-49740 concerns the Linux kernel brcmfmac driver. The vulnerability arises when the device-provided channel spec count exceeds the allocated list length in brcmf_construct_chaninfo() and brcmf_enable_bw40_2g(), causing slab-out-of-bounds reads. The patch adds bounds checks so these functi...

CVE-2023-52931 drm/i915: Avoid potential vm use-after-free

In the Linux kernel, the following vulnerability has been resolved: drm/i915: Avoid potential vm use-after-free Adding the vm to the vmxa table makes it visible to userspace, which could try to race with us to close the vm. So we need to take our extra reference before putting it in the table...

CVE-2023-52931

In the Linux kernel, the following vulnerability has been resolved: drm/i915: Avoid potential vm use-after-free Adding the vm to the vmxa table makes it visible to userspace, which could try to race with us to close the vm. So we need to take our extra reference before putting it in the table...

CVE-2024-58090

In the Linux kernel, the following vulnerability has been resolved: sched/core: Prevent rescheduling when interrupts are disabled David reported a warning observed while loop testing kexec jump: Interrupts enabled after irqrouterresume+0x0/0x50 WARNING: CPU: 0 PID: 560 at drivers/base/syscore.c:1...

CVE-2025-21889 perf/core: Add RCU read lock protection to perf_iterate_ctx()

In the Linux kernel, the following vulnerability has been resolved: perf/core: Add RCU read lock protection to perfiteratectx The perfiteratectx function performs RCU list traversal but currently lacks RCU read lock protection. This causes lockdep warnings when running perf probe with unshare1...

CVE-2025-21881 uprobes: Reject the shared zeropage in uprobe_write_opcode()

In the Linux kernel, the following vulnerability has been resolved: uprobes: Reject the shared zeropage in uprobewriteopcode We triggered the following crash in syzkaller tests: BUG: Bad page state in process syz.7.38 pfn:1eff3 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0...

LSN-0110-1: Kernel Live Patch Security Notice

In the Linux kernel, the following vulnerability has been resolved: tty: ngsm: require CAPNETADMIN to attach NGSM0710 ldisc Any unprivileged user can attach NGSM0710 ldisc, but it requires CAPNETADMIN to create a GSM network anyway. Require initial namespace CAPNETADMIN to do that.CVE-2023-52880 ...

SUSE-SU-2025:0889-1 Security update for the Linux Kernel RT (Live Patch 6 for SLE 15 SP6)

This update for the Linux Kernel 6.4.0-1506001020 fixes one issue. The following security issue was fixed: - CVE-2024-56648: net: hsr: avoid potential out-of-bound access in fillframeinfo bsc1235452...

Linux 5.6 Cred Refcount Overflow

Linux 5.6 suffers from a cred refcount overflow at approximately 39 gigs of memory usage via iouring. see also my related prior bug reports about overflowing refcounts with lots of RAM usage: https://crbug.com/project-zero/809: BPF program refcount, with 32GiB RAM...

CVE-2025-21864

In the Linux kernel, the following vulnerability has been resolved: tcp: drop secpath at the same time as we currently drop dst Xiumei reported hitting the WARN in xfrm6tunnelnetexit while running tests that boil down to: - create a pair of netns - run a basic TCP test over ipcomp6 - delete the...

CVE-2025-21864 tcp: drop secpath at the same time as we currently drop dst

In the Linux kernel, the following vulnerability has been resolved: tcp: drop secpath at the same time as we currently drop dst Xiumei reported hitting the WARN in xfrm6tunnelnetexit while running tests that boil down to: - create a pair of netns - run a basic TCP test over ipcomp6 - delete the...

CVE-2025-21859

CVE-2025-21859 affects the Linux kernel USB gadget f_midi path; a deadlock occurs when a lock is acquired twice in a re-entrant f_midi_transmit. The fix is to schedule the inner f_midi_transmit via a high-priority work queue using queue_work() from the completion handler. Patched commits are refe...

CVE-2025-21853 bpf: avoid holding freeze_mutex during mmap operation

In the Linux kernel, the following vulnerability has been resolved: bpf: avoid holding freezemutex during mmap operation We use map-freezemutex to prevent races between mapfreeze and memory mapping BPF map contents with writable permissions. The way we naively do this means we'll hold freezemutex...

PT-2025-20494

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A long-standing race condition in the Linux kernel's PCI hotplug functionality can lead to a deadlock when hot-removing nested PCI hotplug ports. This issue occurs when a parent hotplug...

Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: HID: core: zero-initialize the report buffer CVE-2024-50302 kernel: ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices CVE-2024-53197 kernel: scsi:...

CVE-2025-21836 io_uring/kbuf: reallocate buf lists on upgrade

In the Linux kernel, the following vulnerability has been resolved: iouring/kbuf: reallocate buf lists on upgrade IORINGREGISTERPBUFRING can reuse an old struct iobufferlist if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field shoul...

CVE-2024-58083 KVM: Explicitly verify target vCPU is online in kvm_get_vcpu()

In the Linux kernel, the following vulnerability has been resolved: KVM: Explicitly verify target vCPU is online in kvmgetvcpu Explicitly verify the target vCPU is fully online prior to clamping the index in kvmgetvcpu. If the index is "bad", the nospec clamping will generate '0', i.e. KVM will...