What’s Vulnerable › Vulnerabilities

CVE-2023-52806: ALSA: hda: Fix possible null-ptr-deref when assigning a stream

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-21 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix possible null-ptr-deref when assigning a stream While AudioDSP drivers assign streams exclusively of HOST or LINK type, nothing blocks a user to attempt to assign a COUPLED stream. As supplied substream instance may be a stub, what is the case when code-loading, such scenario ends with null-ptr-deref.

Affected products

• Linux kernel: before 4.14.331; from 4.15 before 4.19.300; from 4.20 before 5.4.262; from 5.5 before 5.10.202; from 5.11 before 5.15.140; from 5.16 before 6.1.64 — fixed in 4.14.331, 4.19.300, 5.10.202, 5.15.140, 5.4.262, 6.1.64

How to fix

Upgrade to a fixed version: Linux kernel 4.14.331, 4.19.300, 5.10.202, 5.15.140. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2527775616f3638f4fd54649eba8c7b84d5e4250
• https://git.kernel.org/stable/c/25354bae4fc310c3928e8a42fda2d486f67745d7
• https://git.kernel.org/stable/c/43b91df291c8802268ab3cfd8fccfdf135800ed4
• https://git.kernel.org/stable/c/4a320da7f7cbdab2098b103c47f45d5061f42edd
• https://git.kernel.org/stable/c/631a96e9eb4228ff75fce7e72d133ca81194797e
• https://git.kernel.org/stable/c/758c7733cb821041f5fd403b7b97c0b95d319323
• https://git.kernel.org/stable/c/7de25112de8222fd20564769e6c99dc9f9738a0b
• https://git.kernel.org/stable/c/f93dc90c2e8ed664985e366aa6459ac83cdab236
• https://git.kernel.org/stable/c/fe7c1a0c2b25c82807cb46fc3aadbf2664a682b0
• https://git.kernel.org/stable/c/2527775616f3638f4fd54649eba8c7b84d5e4250
• https://git.kernel.org/stable/c/25354bae4fc310c3928e8a42fda2d486f67745d7
• https://git.kernel.org/stable/c/43b91df291c8802268ab3cfd8fccfdf135800ed4

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