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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50226

crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • e799035609e1526761aa2f896a974b233d04d36d to < 4c5300f6f5e18b11c02a92f136e69b98fddba15eaffected
  • e799035609e1526761aa2f896a974b233d04d36d to < f2a920daa780956b987c14b9f23de7c3c8915bf2affected
  • e799035609e1526761aa2f896a974b233d04d36d to < caa395aa16e7c9193fd7fa6cde462dd8229d4953affected
  • e799035609e1526761aa2f896a974b233d04d36d to < e11fb0a3a39bb42da35fa662c46ce7391f277436affected
  • e799035609e1526761aa2f896a974b233d04d36d to < 13dc15a3f5fd7f884e4bfa8c011a0ae868df12aeaffected

Linux Linux

Default version status: affected

  • 4.16affected
  • 0 to < 4.16unaffected
  • 5.10.173 to ≤ 5.10.*unaffected
  • 5.15.61 to ≤ 5.15.*unaffected
  • 5.18.18 to ≤ 5.18.*unaffected
  • 5.19.2 to ≤ 5.19.*unaffected
  • 6.0 to ≤ *unaffected

References