CVE-2024-36016

HIGH
Published May 29, 2024 Modified Nov 4, 2025 CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size.

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CVSS v3.1 Score

7.7
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04 https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54 https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350 https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5 https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56 https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3 https://git.kernel.org/stable/c/0fb736c9931e02dbc7d9a75044c8e1c039e50f04 https://git.kernel.org/stable/c/46f52c89a7e7d2691b97a9728e4591d071ca8abc https://git.kernel.org/stable/c/47388e807f85948eefc403a8a5fdc5b406a65d5a https://git.kernel.org/stable/c/4c267110fc110390704cc065edb9817fdd10ff54 https://git.kernel.org/stable/c/774d83b008eccb1c48c14dc5486e7aa255731350 https://git.kernel.org/stable/c/9513d4148950b05bc99fa7314dc883cc0e1605e5 https://git.kernel.org/stable/c/b229bc6c6ea9fe459fc3fa94fd0a27a2f32aca56 https://git.kernel.org/stable/c/b890d45aaf02b564e6cae2d2a590f9649330857d https://git.kernel.org/stable/c/f126ce7305fe88f49cdabc6db4168b9318898ea3

Frequently Asked Questions

What is CVE-2024-36016? +
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix possible out-of-bounds in gsm0_receive() Assuming the following: - side A configures the n_gsm in basic option mode - side B sends the header of a basic option mode frame with data length 1 - side A switches to advanced option mode - side B sends 2 data bytes which exceeds gsm->len Reason: gsm->len is not used in advanced option mode. - side A switches to basic option mode - side B keeps sending until gsm0_receive() writes past gsm->buf Reason: Neither gsm->state nor gsm->len have been reset after reconfiguration. Fix this by changing gsm->count to gsm->len comparison from equal to less than. Also add upper limit checks against the constant MAX_MRU in gsm0_receive() and gsm1_receive() to harden against memory corruption of gsm->len and gsm->mru. All other checks remain as we still need to limit the data according to the user configuration and actual payload size. It has a CVSS v3.1 base score of 7.7 (HIGH).
How severe is CVE-2024-36016? +
CVE-2024-36016 has a CVSS v3.1 score of 7.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-36016? +
CVE-2024-36016 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-2024-36016? +
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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