CVE-2022-47939

CRITICAL
Published Dec 23, 20223y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Dec 23, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SMB2_TREE_DISCONNECT.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <5.15.61
linuxlinux_kernel*≥5.16  –  <5.18.18
linuxlinux_kernel*≥5.19  –  <5.19.2

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2022/12/23/10
    Mailing ListThird Party Advisory
  • cdn.kernel.org https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
    Mailing ListPatchVendor Advisory
  • git.kernel.org https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
    Mailing ListPatchVendor Advisory
  • github.com https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
    PatchThird Party Advisory
  • secpod.com https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-kernel-5-15-has-a-critical-vulnerability-patch-ksmbd-immediately/
    Third Party Advisory
  • zerodayinitiative.com https://www.zerodayinitiative.com/advisories/ZDI-22-1690/
    Third Party AdvisoryVDB Entry

Remediation

  • cdn.kernel.org https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
    Mailing ListPatchVendor Advisory
  • git.kernel.org https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
    Mailing ListPatchVendor Advisory
  • github.com https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
    PatchThird Party Advisory