CVE-2022-49492

MEDIUM EPSS 19.6%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
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Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags In nvme_alloc_admin_tags, the admin_q can be set to an error (typically -ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which is checked immediately after the call. However, when we return the error message up the stack, to nvme_reset_work the error takes us to nvme_remove_dead_ctrl() nvme_dev_disable() nvme_suspend_queue(&dev->queues[0]). Here, we only check that the admin_q is non-NULL, rather than not an error or NULL, and begin quiescing a queue that never existed, leading to bad / NULL pointer dereference.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
19.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.318
linuxlinux_kernel*≥4.10  –  <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.121
linuxlinux_kernel*≥5.11  –  <5.15.46
linuxlinux_kernel*≥5.16  –  <5.17.14
linuxlinux_kernel*≥5.18  –  <5.18.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/54a4c1e47d1b2585e74920399455bd9abbfb2bd7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a28556082d1fbcbc599baf1c24252dfc73efefc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8321b17789f614414206af07e17ce4751c95dc76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8da2b7bdb47e94bbc4062a3978c708926bcb022c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/906c81dba8ee8057523859b5e1a2479e9fd34860
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e649471b396fa0139d53919354ce1eace9b9a24
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af98940dd33c9f9e1beb4f71c0a39260100e2a65
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da42761181627e9bdc37d18368b827948a583929
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f76729662650cd7bc8f8194e057af381370349a7
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/54a4c1e47d1b2585e74920399455bd9abbfb2bd7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a28556082d1fbcbc599baf1c24252dfc73efefc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8321b17789f614414206af07e17ce4751c95dc76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8da2b7bdb47e94bbc4062a3978c708926bcb022c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/906c81dba8ee8057523859b5e1a2479e9fd34860
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e649471b396fa0139d53919354ce1eace9b9a24
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af98940dd33c9f9e1beb4f71c0a39260100e2a65
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da42761181627e9bdc37d18368b827948a583929
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f76729662650cd7bc8f8194e057af381370349a7
    Patch