CVE-2022-49376

Local service interruption via SCSI probe null dereference

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux SCSI disk driver from 4.10 through 5.18.3 allows local users to interrupt service during disk probing. The sd_probe() error path calls sd_zbc_release_disk() before sdkp->device is initialized, and sd_is_zoned() then dereferences the null device pointer. Exploitation requires low-privileged local access and an early SCSI disk probe failure; the resulting kernel fault can crash the host without exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux SCSI disk driver from 4.10 through 5.18.3 allows local users to interrupt service during disk probing. The sd_probe() error path calls sd_zbc_release_disk() before sdkp->device is initialized, and sd_is_zoned() then dereferences the null device pointer. Exploitation requires low-privileged local access and an early SCSI disk probe failure; the resulting kernel fault can crash the host without exposing or modifying data.

The record

CVE
CVE-2022-49376
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.10
  2. Affected versionversion=89d9475610771b5e5fe1879075f0fc9ba6e3755f <05fbde3a77a4f1d62e4c4428f384288c1f1a0be5
  3. Affected versionversion=89d9475610771b5e5fe1879075f0fc9ba6e3755f <0fcb0b131cc90c8f523a293d84c58d0c7273c96f
  4. Affected versionversion=89d9475610771b5e5fe1879075f0fc9ba6e3755f <3733439593ad12f7b54ae35c273ea6f15d692de3
  5. Affected versionversion=89d9475610771b5e5fe1879075f0fc9ba6e3755f <78f8e96df06e2d04d82d4071c299b59d28744f47
  6. Affected versionversion=89d9475610771b5e5fe1879075f0fc9ba6e3755f <c1f0187025905e9981000d44a92e159468b561a8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.10; version=89d9475610771b5e5fe1879075f0fc9ba6e3755f <05fbde3a77a4f1d62e4c4428f384288c1f1a0be5; version=89d9475610771b5e5fe1879075f0fc9ba6e3755f <0fcb0b131cc90c8f523a293d84c58d0c7273c96f; version=89d9475610771b5e5fe1879075f0fc9ba6e3755f <3733439593ad12f7b54ae35c273ea6f15d692de3; version=89d9475610771b5e5fe1879075f0fc9ba6e3755f <78f8e96df06e2d04d82d4071c299b59d28744f47; version=89d9475610771b5e5fe1879075f0fc9ba6e3755f <c1f0187025905e9981000d44a92e159468b561a8

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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