CVE-2023-53531

CVE-2023-53531 affects the Linux kernel’s null_blk poll timeout handling. The provided details describe a race between null_timeout_rq() and null_poll() that can cause a NULL pointer dereference (address 0x8) and kernel panic during io_uring benchmarks on /dev/nullb0. The root cause is a race in ...

SUSE CVE-2023-53366

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

CVE-2023-53366

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

AZL-72263 CVE-2023-53366 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

CVE-2023-53366

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

CVE-2023-53366 block: be a bit more careful in checking for NULL bdev while polling

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

CVE-2023-53366

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

CVE-2023-53366

CVE-2023-53366 (Linux kernel)修正了在轮询时未正确检查 bio->bi_bdev 是否为 NULL 的漏洞，根本原因是在两任务共用轮询队列时，任务 B 可能在任务 A 仍在轮询时将 IO 重新分配给 bio，导致崩溃（kernel oops）。影响点在块层的 bio_poll/io_do_iopoll/io_uring_enter 路径，已通过内核修复在对 NULL bdev 的检查中加强保护。CVSSv3.1 向量为 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H，基线分数 5.5（中等），局部可利用且无需用户交互，影响的为可用...

CVE-2023-53366 block: be a bit more careful in checking for NULL bdev while polling

In the Linux kernel, the following vulnerability has been resolved: block: be a bit more careful in checking for NULL bdev while polling Wei reports a crash with an application using polled IO: PGD 14265e067 P4D 14265e067 PUD 47ec50067 PMD 0 Oops: 0000 1 SMP CPU: 0 PID: 21915 Comm: iocore0 Kdump:...

UBUNTU-CVE-2025-38255

In the Linux kernel, the following vulnerability has been resolved: lib/groupcpus: fix NULL pointer dereference from groupcpusevenly While testing nullblk with configfs, echo 0 pollqueues will trigger following panic: BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 000...

SUSE CVE-2022-50089

In the Linux kernel, the following vulnerability has been resolved: btrfs: ensure pages are unlocked on cowfilerange failure There is a hungtask report on zoned btrfs like below. https://github.com/naota/linux/issues/59 726.328648 INFO: task rocksdb:high0:11085 blocked for more than 241 seconds...

OESA-2025-1515 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: blk-mq: Fix kmemleak in blkmqinitallocatedqueue There is a kmemleak caused by modprobe nullblk.ko unreferenced object 0xffff8881acb1f000 size 1024: comm...

UBUNTU-CVE-2022-49901

In the Linux kernel, the following vulnerability has been resolved: blk-mq: Fix kmemleak in blkmqinitallocatedqueue There is a kmemleak caused by modprobe nullblk.ko unreferenced object 0xffff8881acb1f000 size 1024: comm "modprobe", pid 836, jiffies 4294971190 age 27.068s hex dump first 32 bytes:...

CVE-2022-49901 blk-mq: Fix kmemleak in blk_mq_init_allocated_queue

In the Linux kernel, the following vulnerability has been resolved: blk-mq: Fix kmemleak in blkmqinitallocatedqueue There is a kmemleak caused by modprobe nullblk.ko unreferenced object 0xffff8881acb1f000 size 1024: comm "modprobe", pid 836, jiffies 4294971190 age 27.068s hex dump first 32 bytes:...

SUSE CVE-2022-49057

In the Linux kernel, the following vulnerability has been resolved: block: nullblk: end timed out poll request When poll request is timed out, it is removed from the poll list, but not completed, so the request is leaked, and never get chance to complete. Fix the issue by ending it in timeout...

DEBIAN-CVE-2022-49057

In the Linux kernel, the following vulnerability has been resolved: block: nullblk: end timed out poll request When poll request is timed out, it is removed from the poll list, but not completed, so the request is leaked, and never get chance to complete. Fix the issue by ending it in timeout...

UBUNTU-CVE-2022-49057

In the Linux kernel, the following vulnerability has been resolved: block: nullblk: end timed out poll request When poll request is timed out, it is removed from the poll list, but not completed, so the request is leaked, and never get chance to complete. Fix the issue by ending it in timeout...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: nullblk: fix null-ptr-dereference while configuring 'power' and 'submitqueues' CVE-2024-36478 In the Linux kernel, the following vulnerability has been resolved: iouring: fix possible deadlock in...

UBUNTU-CVE-2024-53167

In the Linux kernel, the following vulnerability has been resolved: nfs/blocklayout: Don't attempt unregister for invalid block device Since commit d869da91cccb "nfs/blocklayout: Fix premature PR key unregistration" an unmount of a pNFS SCSI layout-enabled NFS may dereference a NULL blockdevice i...

Ubuntu 22.04 LTS : Linux kernel (Azure) vulnerabilities (USN-7123-1)

"The remote Ubuntu 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-7123-1 advisory. It was discovered that the CIFS network file system implementation in the Linux kernel did not properly validate certain SMB messages, leading to an...