CVE-2023-53531 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer DereferenceCWE-366 — Race Condition within a Thread5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 98.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 1

Description

In the Linux kernel, the following vulnerability has been resolved: null_blk: fix poll request timeout handling When doing io_uring benchmark on /dev/nullb0, it's easy to crash the kernel if poll requests timeout triggered, as reported by David. [1] BUG: kernel NULL pointer dereference, address: 0000000000000008 Workqueue: kblockd blk_mq_timeout_work RIP: 0010:null_timeout_rq+0x4e/0x91 Call Trace: ? null_timeout_rq+0x4e/0x91 blk_mq_handle_expired+0x31/0x4b bt_iter+0x68/0x84 ? bt_tags_iter+0x8…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel5.16 — 6.1.54+1
▶Debianlinux/linux_kernel< 6.1.55-1+2
▶CVEListV5linux/linux0a593fbbc245a85940ed34caa3aa1e4cb060c54b — a0b4a0666beacfe8add9c71d8922475541dbae73+3
▶debiandebian/linux< linux 6.1.55-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2023-53531: In the Linux kernel, the following vulnerability has been resolved: null_blk: fix poll request timeout handling When doing io_uring benchmark on /dev/↗2025-10-01
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GHSA
GHSA-vv6q-p28j-9w24: In the Linux kernel, the following vulnerability has been resolved: null_blk: fix poll request timeout handling When doing io_uring benchmark on /de↗2025-10-01
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📋Vendor Advisories

2
Red Hat
kernel: null_blk: fix poll request timeout handling↗2025-10-01
▶
Debian
CVE-2023-53531: linux - In the Linux kernel, the following vulnerability has been resolved: null_blk: f...↗2023
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