CVE-2022-48747

Local uninitialized-data disclosure via wrong page offset

Published Jun 20, 2024 · Updated May 23, 2026

Information disclosure in affected Linux kernel versions allows local users to read uninitialized data through a block device. In block/bio.c, bio_truncate() zeroes a truncated read from an offset that omits the bio vector's page offset, leaving tail bytes uncleared. Exposure requires a corrupted or truncated filesystem and userspace reading the end of its block device, limiting the consequence to residual bytes returned by that read.

CVSS severity7.5
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Linux kernel versions allows local users to read uninitialized data through a block device. In block/bio.c, bio_truncate() zeroes a truncated read from an offset that omits the bio vector's page offset, leaving tail bytes uncleared. Exposure requires a corrupted or truncated filesystem and userspace reading the end of its block device, limiting the consequence to residual bytes returned by that read.

The record

CVE
CVE-2022-48747
Published
Jun 20, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=5.4.9 <5.4.176
  2. Affected versionversion=5.5
  3. Affected versionversion=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <3ee859e384d453d6ac68bfd5971f630d9fa46ad3
  4. Affected versionversion=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <4633a79ff8bc82770486a063a08b55e5162521d8
  5. Affected versionversion=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <941d5180c430ce5b0f7a3622ef9b76077bfa3d82
  6. Affected versionversion=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <b63e120189fd92aff00096d11e2fc5253f60248b
  7. Affected versionversion=943cd69efac437d82a7aea0659fccbcc071730de <6cbf4c731d7812518cd857c2cfc3da9fd120f6ae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4.9 <5.4.176; version=5.5; version=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <3ee859e384d453d6ac68bfd5971f630d9fa46ad3; version=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <4633a79ff8bc82770486a063a08b55e5162521d8; version=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <941d5180c430ce5b0f7a3622ef9b76077bfa3d82; version=85a8ce62c2eabe28b9d76ca4eecf37922402df93 <b63e120189fd92aff00096d11e2fc5253f60248b; version=943cd69efac437d82a7aea0659fccbcc071730de <6cbf4c731d7812518cd857c2cfc3da9fd120f6ae
The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f4 <3ee859e384d4; version=1da177e4c3f4 <4633a79ff8bc; version=1da177e4c3f4 <6cbf4c731d78; version=1da177e4c3f4 <941d5180c430; version=1da177e4c3f4 <b63e120189fd

Published CVSS scores

7.5CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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-908Use of Uninitialized Resource

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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