In the Linux kernel, the following vulnerability has been resolved: block: initialize integrity buffer to zero before writing it to media Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory. Fix this by adding the __GFP_ZERO flag to allocations for writes.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f cve-icon cve-icon
https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644 cve-icon cve-icon
https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005 cve-icon cve-icon
https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f cve-icon cve-icon
https://git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6 cve-icon cve-icon
https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2 cve-icon cve-icon
https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1 cve-icon cve-icon
https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024081734-CVE-2024-43854-5586@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2024-43854 cve-icon
https://www.cve.org/CVERecord?id=CVE-2024-43854 cve-icon
History

Thu, 12 Sep 2024 12:00:00 +0000

Type Values Removed Values Added
References

Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 Aug 2024 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-401
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Mon, 19 Aug 2024 19:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Mon, 19 Aug 2024 04:45:00 +0000

Type Values Removed Values Added
References

Sat, 17 Aug 2024 09:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: block: initialize integrity buffer to zero before writing it to media Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory. Fix this by adding the __GFP_ZERO flag to allocations for writes.
Title block: initialize integrity buffer to zero before writing it to media
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-08-17T09:22:11.297Z

Updated: 2024-09-15T17:54:20.298Z

Reserved: 2024-08-17T09:11:59.278Z

Link: CVE-2024-43854

cve-icon Vulnrichment

Updated: 2024-09-11T12:42:22.896Z

cve-icon NVD

Status : Modified

Published: 2024-08-17T10:15:10.447

Modified: 2024-09-12T12:15:49.423

Link: CVE-2024-43854

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-08-17T00:00:00Z

Links: CVE-2024-43854 - Bugzilla