CVE-2023-52806: ALSA: hda: Fix possible null-ptr-deref when assigning a stream
Vulnerability summary
CVE-2023-52806 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.3% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 15 · Related 15Timeline
- 21-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.26%
Chance of exploitation in the next 30 days
Percentile
17%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.26% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu116 products
- linuxAll versions (No fix recorded) | < 4.4.0-258.292 | < 4.15.0-228.240 | < 5.4.0-173.191 | < 5.15.0-100.110
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1135.141 | < 4.4.0-1173.188 | < 4.15.0-1172.185 | < 5.4.0-1120.130 | < 5.15.0-1056.61
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 7de25112de8222fd20564769e6c99dc9f9738a0b | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 758c7733cb821041f5fd403b7b97c0b95d319323 | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 2527775616f3638f4fd54649eba8c7b84d5e4250 | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 25354bae4fc310c3928e8a42fda2d486f67745d7 | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 631a96e9eb4228ff75fce7e72d133ca81194797e | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 43b91df291c8802268ab3cfd8fccfdf135800ed4 | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < fe7c1a0c2b25c82807cb46fc3aadbf2664a682b0 | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < 4a320da7f7cbdab2098b103c47f45d5061f42edd | ≥ 14752412721c61d9ac1e8d8fb51d7148cb15f85b, < f93dc90c2e8ed664985e366aa6459ac83cdab236 | 4.2
- linux_kernel< 4.14.331 | ≥ 4.15, < 4.19.300 | ≥ 4.20, < 5.4.262 | ≥ 5.5, < 5.10.202 | ≥ 5.11, < 5.15.140 | ≥ 5.16, < 6.1.64 | ≥ 6.2, < 6.5.13 | ≥ 6.6, < 6.6.3
Debian1 product
- linux< 6.1.64-1 | < 6.6.8-1
3 vendors · 119 products
