CVE-2023-0266 (GCVE-0-2023-0266)

Vulnerability from cvelistv5 – Published: 2023-01-30 13:09 – Updated: 2025-10-21 23:15
VLAI CISA Previdian
Title
Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
Summary
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e
Severity
7.9 (High)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 15:07 UTC
CWE
Assigner
Google CNA under the Google root
CNA scorecard B 78/100 over 38 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Kernel Affected: 4.14 , < 56b88b50565cd8b946a2d00b0c83927b7ebb055e (git)
guessed Create a notification for this product.
Date Public
2023-01-13 00:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a17d340e-6173-450b-984f-3ae924ef01c0

Vulnerability ID: CVE-2023-0266

Status: Confirmed

Status Updated: 2023-03-30 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-03-30
Asserted: 2023-03-30
Scope
Notes: Linux Kernel Use-After-Free Vulnerability | Affected: Linux / Kernel | Description: Linux kernel contains a use-after-free vulnerability that allows for privilege escalation to gain ring0 access from the system user. | Required action: Apply updates per vendor instructions. | Due date: 2023-04-20 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4; https://nvd.nist.gov/vuln/detail/CVE-2023-0266
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-416
Feed CISA Known Exploited Vulnerabilities Catalog
Product Kernel
Due Date 2023-04-20
Date Added 2023-03-30
Vendorproject Linux
Vulnerabilityname Linux Kernel Use-After-Free Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:27 UTC | Updated: 2026-11-04 13:36 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c772770d-2948-4080-8fb4-bd6e7cf2055b

Vulnerability ID: CVE-2023-0266

Status: Confirmed

Status Updated: 2023-03-30 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-03-30
Asserted: 2023-03-30
Scope
Notes: KEVIntel entry: Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel | Affected: Linux / Linux Kernel | CVSS: 7.9 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
Vendor Linux
Product Linux Kernel
Added Date 2023-03-30T00:00:00.000Z
Cvss Score 7.9
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

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