CVE-2022-50226

MEDIUM EPSS 8.7%
Published Jun 18, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak For some sev ioctl interfaces, input may be passed that is less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the buffer, the sev ioctl interfaces with the issue may return uninitialized slab memory. Currently, all of the ioctl interfaces in the ccp driver are safe, but to prevent future problems, change all ioctl interfaces that allocate memory with kmalloc to use kzalloc and memset the data buffer to zero in sev_ioctl_do_platform_status.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
8.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥4.16  –  <5.10.173
linuxlinux_kernel*≥5.11  –  <5.15.61
linuxlinux_kernel*≥5.16  –  <5.18.18
linuxlinux_kernel*≥5.19  –  <5.19.2

References 5

  • git.kernel.org https://git.kernel.org/stable/c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2
    Patch