CVE-2024-36477: linux kernel Out-of-bounds Read — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer The TPM SPI transfer mechanism uses MAX_SPI_FRAMESIZE for computing the maximum transfer length and the size of the transfer buffer. As such, it does not account for the 4 bytes of header that prepends the SPI data frame. This can result in out-of-bounds accesses and was confirmed with KASAN. Introduce SPI_HDRSIZE to account for the header and use to allocate the transfer buffer.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 6.6.33
linux	linux_kernel	< 6.9.4
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/1547183852dcdfcc25878db7dd3620509217b0cd https://git.kernel.org/stable/c/195aba96b854dd664768f382cd1db375d8181f88 https://git.kernel.org/stable/c/de13c56f99477b56980c7e00b09c776d16b7563d https://git.kernel.org/stable/c/1547183852dcdfcc25878db7dd3620509217b0cd https://git.kernel.org/stable/c/195aba96b854dd664768f382cd1db375d8181f88 https://git.kernel.org/stable/c/de13c56f99477b56980c7e00b09c776d16b7563d

Frequently Asked Questions

What is CVE-2024-36477? +

In the Linux kernel, the following vulnerability has been resolved: tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer The TPM SPI transfer mechanism uses MAX_SPI_FRAMESIZE for computing the maximum transfer length and the size of the transfer buffer. As such, it does not account for the 4 bytes of header that prepends the SPI data frame. This can result in out-of-bounds accesses and was confirmed with KASAN. Introduce SPI_HDRSIZE to account for the header and use to allocate the transfer buffer. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-36477? +

CVE-2024-36477 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-36477? +

CVE-2024-36477 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-36477? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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