7.8

CVE-2022-50229: ALSA: bcd2000: Fix a UAF bug on the error path of probing

Analyzed
AliasesUBUNTU-CVE-2022-50229DEBIAN-CVE-2022-50229
Published 18-06-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-50229 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 7
RHSA-2023:2458RHSA-2023:2951RHSA-2025:17109RHSA-2025:17161RHSA-2025:18043RHSA-2025:21667

Timeline

  1. 18-06-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: bcd2000: Fix a UAF bug on the error path of probing When the driver fails in snd_card_register() at probe time, it will free the 'bcd2k->midi_out_urb' before killing it, which may cause a UAF bug. The following log can reveal it: [ 50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000] [ 50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0 [ 50.729530] Call Trace: [ 50.732899] bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000] Fix this by adding usb_kill_urb() before usb_free_urb().

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu111 products
  • linuxAll versions (No fix recorded) | < 4.15.0-197.208 | < 5.4.0-132.148 | < 5.15.0-53.59
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1143.155 | < 5.4.0-1089.97 | < 5.15.0-1023.27
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b47a22290d581277be70e8a597824a4985d39e83, < a718eba7e458e2f40531be3c6b6a0028ca7fcace | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 4fc41f7ebb7efca282f1740ea934d16f33c1d109 | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 5e7338f4dd92b2f8915a82abfa1dd3ad3464bea0 | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 05e0bb8c3c4dde3e21b9c1cf9395afb04e8b24db | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 348620464a5c127399ac09b266f494f393661952 | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 64ca7f50ad96c2c65ae390b954925a36eabe04aa | ≥ b47a22290d581277be70e8a597824a4985d39e83, < 1d6a246cf97c380f2da76591f03019dd9c9599c3 | ≥ b47a22290d581277be70e8a597824a4985d39e83, < b0d4af0a4763ddc02344789ef2a281c494bc330d | ≥ b47a22290d581277be70e8a597824a4985d39e83, < ffb2759df7efbc00187bfd9d1072434a13a54139 | 3.16
  • linux_kernel≥ 3.16, < 4.9.326 | ≥ 4.10, < 4.14.291 | ≥ 4.15, < 4.19.256 | ≥ 4.20, < 5.4.211 | ≥ 5.5, < 5.10.137 | ≥ 5.11, < 5.15.61 | ≥ 5.16, < 5.18.18 | ≥ 5.19, < 5.19.2
Debian1 product
  • linux< 6.0.2-1

3 vendors · 114 products

References

12 links
Show all 12 references