CVE-2022-50388

Local kernel crash via NULL bio dereference

Published Sep 18, 2025 · Updated Sep 18, 2025

NULL pointer dereference in the Linux kernel allows local users to crash the system through an NVMe multipath flush completion. In nvme_trace_bio_complete, a flush request created by blk_kick_flush has no bio, but completion tracing passes that NULL pointer to trace_block_bio_complete. The crash requires NVMe multipath to be active and blktrace to be enabled, and it interrupts the host rather than disclosing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.15%
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 kernel allows local users to crash the system through an NVMe multipath flush completion. In nvme_trace_bio_complete, a flush request created by blk_kick_flush has no bio, but completion tracing passes that NULL pointer to trace_block_bio_complete. The crash requires NVMe multipath to be active and blktrace to be enabled, and it interrupts the host rather than disclosing or modifying data.

The record

CVE
CVE-2022-50388
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <183c2aaef40a91acbaae45c3824d6cde7bb62b10
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3659fb5ac29a5e6102bebe494ac789fd47fb78f4
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4df413d46960f11c8c105238cfc3f5ff4c95c003
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f13301a69ababa6c2236fb4f0393b7e914e7e1e0
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fcd2d199486033223e9b2a6a7f9a01dd0327eac3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <183c2aaef40a91acbaae45c3824d6cde7bb62b10; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3659fb5ac29a5e6102bebe494ac789fd47fb78f4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4df413d46960f11c8c105238cfc3f5ff4c95c003; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f13301a69ababa6c2236fb4f0393b7e914e7e1e0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fcd2d199486033223e9b2a6a7f9a01dd0327eac3

Published CVSS scores

5.5CISA ADP VulnrichmentCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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