#VU89678 Off-by-one in Linux kernel - CVE-2024-26766

Vulnerability identifier: #VU89678

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26766

CWE-ID: CWE-193

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an off-by-one error within the _pad_sdma_tx_descs() function in drivers/infiniband/hw/hfi1/sdma.c. A local user can trigger an off-by-one error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790
https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5
https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2
https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39
https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b
https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a
https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9
https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.