CVE-2022-48635

Local denial of service via zero-length DAX read

Published Apr 28, 2024 · Updated May 11, 2026

An infinite loop in affected Linux kernel releases allows local users to hang a filesystem DAX read path with a zero-length read. In fs/dax.c, dax_iomap_rw() enters iomap_iter() without first rejecting a zero iov_iter count; iomap_iter() warns and repeatedly returns 1, so the outer loop never exits. Reachability requires a filesystem DAX path, demonstrated through virtiofs, and the calling read task remains stuck while consuming processing time.

CVSS severity6.2
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An infinite loop in affected Linux kernel releases allows local users to hang a filesystem DAX read path with a zero-length read. In fs/dax.c, dax_iomap_rw() enters iomap_iter() without first rejecting a zero iov_iter count; iomap_iter() warns and repeatedly returns 1, so the outer loop never exits. Reachability requires a filesystem DAX path, demonstrated through virtiofs, and the calling read task remains stuck while consuming processing time.

The record

CVE
CVE-2022-48635
Published
Apr 28, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2024CVE 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=5.15
  2. Affected versionversion=8df4919cb921b28809d05feae3e98dc5d8b48146 <463f36137c40342fb03bba380c1bf703c40d89a6
  3. Affected versionversion=ca289e0b95afa973d204c77a4ad5c37e06145fbf <17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3
  4. Affected versionversion=ca289e0b95afa973d204c77a4ad5c37e06145fbf <60644dffac87b1bb47bdb393aa29d5f2ffcf41a0
  5. Affected versionversion=ca289e0b95afa973d204c77a4ad5c37e06145fbf <929ef155e1da41c06f4d8ca86ae12b851a83a744

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=8df4919cb921b28809d05feae3e98dc5d8b48146 <463f36137c40342fb03bba380c1bf703c40d89a6; version=ca289e0b95afa973d204c77a4ad5c37e06145fbf <17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3; version=ca289e0b95afa973d204c77a4ad5c37e06145fbf <60644dffac87b1bb47bdb393aa29d5f2ffcf41a0; version=ca289e0b95afa973d204c77a4ad5c37e06145fbf <929ef155e1da41c06f4d8ca86ae12b851a83a744
The Linux Kernel Organization · Linux Kernelversion=5.15; version=ca289e0b95af <17d9c15c9b9e

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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