PT-2024-7517 · Linux · Linux Kernel

Steve French · Published 2024-07-19 · Updated 2024-09-06 · CVE-2024-42256

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the smb2 async writev() function in the Linux kernel, which is responsible for handling server re-repick on subrequest retry. When a subrequest is marked for needing retry, netfs will call cifs prepare write(), which makes cifs repick the server for the operation before renegotiating credits. This can lead to misaccounting if a different server is selected. The problem manifests as a warning and may be triggered by running certain xfstests against an Azure server in multichannel mode.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Information Disclosure

Weakness Enumeration

CWE-399

CWE-200

CWE-911

Related Identifiers

BDU:2024-08914

CVE-2024-42256

Affected Products

Linux Kernel

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42256.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2024-42256 · Vendor Advisory
• https://git.kernel.org/stable/c/de40579b903883274fe203865f29d66b168b7236 · Patch
• https://osv.dev/vulnerability/CVE-2024-42256 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-08914 · Security Note
• https://git.kernel.org/stable/c/b1d0a566769b6fb3795b5289fc1daf9e0638d97a · Patch
• https://ubuntu.com/security/CVE-2024-42256 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-42256 · Security Note
• https://cve.org/CVERecord?id=CVE-2024-42256 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-42256 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2024-42256 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2024-42256 · Note
• https://lore.kernel.org/linux-cve-announce/2024080820-CVE-2024-42256-afbb@gregkh · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/de40579b903883274fe203865f29d66b168b7236 · Note