CVE-2024-49858

Oct. 23, 2024, 4:35 p.m.

5.5
Medium

Description

In the Linux kernel, the following vulnerability has been resolved: efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption The TPM event log table is a Linux specific construct, where the data produced by the GetEventLog() boot service is cached in memory, and passed on to the OS using an EFI configuration table. The use of EFI_LOADER_DATA here results in the region being left unreserved in the E820 memory map constructed by the EFI stub, and this is the memory description that is passed on to the incoming kernel by kexec, which is therefore unaware that the region should be reserved. Even though the utility of the TPM2 event log after a kexec is questionable, any corruption might send the parsing code off into the weeds and crash the kernel. So let's use EFI_ACPI_RECLAIM_MEMORY instead, which is always treated as reserved by the E820 conversion logic.

Product(s) Impacted

Vendor Product Versions
Linux
  • Linux Kernel
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /

References

https://git.kernel.org/stable/c/11690d7e76842f29b60fbb5b35bc97d206ea0e83
https://git.kernel.org/stable/c/19fd2f2c5fb36b61506d3208474bfd8fdf1cada3
https://git.kernel.org/stable/c/2e6871a632a99d9b9e2ce3a7847acabe99e5a26e
https://git.kernel.org/stable/c/38d9b07d99b789efb6d8dda21f1aaad636c38993
https://git.kernel.org/stable/c/5b22c038fb2757c652642933de5664da471f8cb7
https://git.kernel.org/stable/c/77d48d39e99170b528e4f2e9fc5d1d64cdedd386
https://git.kernel.org/stable/c/f76b69ab9cf04358266e3cea5748c0c2791fbb08

Tags

416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD-CWE-noinfo
2024-10-21
CVE-2024-49858

CVSS Score

5.5 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH

    • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

    View Vector String

Timeline

Published: Oct. 21, 2024, 1:15 p.m.
Last Modified: Oct. 23, 2024, 4:35 p.m.

Status : Analyzed

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.