PT-2022-6040 · Linux+2 · Linux Kernel+2

Arnaud Gatignol + 4 · Published 2022-07-28 · Updated 2023-05-03 · CVE-2022-47938

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions 5.15 through 5.19 before 5.19.2

Description The issue is related to an out-of-bounds read in the Linux kernel's ksmbd subsystem, specifically in the fs/ksmbd/smb2misc.c file. This occurs when handling the SMB2 TREE CONNECT operation. Exploitation of this issue can allow a remote attacker to cause a denial of service.

Recommendations For Linux kernel versions 5.15 through 5.19 before 5.19.2, update to version 5.19.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the SMB2 TREE CONNECT operation until a patch is available.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2022-2497

ALT-PU-2022-2523

ALT-PU-2022-2915

ALT-PU-2022-2919

ALT-PU-2023-1684

ALT-PU-2023-1741

AZL-12093

BDU:2022-07504

CVE-2022-47938

OESA-2023-1012

ZDI-22-1689

Affected Products

Alt Linux

Astra Linux

Linux Kernel

References · 29

• https://github.com/torvalds/linux/commit/824d4f64c20093275f72fc8101394d75ff6a249e · Patch
• https://zerodayinitiative.com/advisories/ZDI-22-1689 · Security Note
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=824d4f64c20093275f72fc8101394d75ff6a249e · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-47938 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-47939 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-47938 · Security Note
• https://ubuntu.com/security/CVE-2022-47938 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-47938 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20231214SE16 · Vendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2023-0303SE17MD · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-47938 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-47938 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1012 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-47938 · Security Note