Linux Kernel Use-After-Free Vulnerability

Summary

CVECVE-2023-0266
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-01-30 14:15:00 UTC
Updated2023-08-29 17:59:00 UTC
DescriptionA 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

Risk And Classification

EPSS: 0.000970000 probability, percentile 0.268820000 (date 2026-04-01)

CISA KEV: Listed on 2023-03-30; due 2023-04-20; ransomware use Unknown

Problem Types: CWE-416

CISA Known Exploited Vulnerability

VendorLinux
ProductKernel
NameLinux Kernel Use-After-Free Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 6.2 rc1 All All
Operating System Linux Linux Kernel 6.2 rc2 All All
Operating System Linux Linux Kernel 6.2 rc3 All All

References

ReferenceSourceLinkTags
ALSA: control: code refactoring for ELEM_READ/ELEM_WRITE operations · torvalds/linux@becf9e5 · GitHub MISC github.com
[SECURITY] [DLA 3403-1] linux security update MISC lists.debian.org
alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch « queue-5.10 - kernel/git/stable/stable-queue.git - Linux kernel stable patch queue MISC git.kernel.org
ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF · torvalds/linux@56b88b5 · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 160505 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2023-12196)
  • 160524 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-1470)
  • 160537 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-1566)
  • 181491 Debian Security Update for linux (DSA 5324-1)
  • 181618 Debian Security Update for linux-5.10 (DLA 3349-1)
  • 181768 Debian Security Update for linux (DLA 3403-1)
  • 182961 Debian Security Update for linux (CVE-2023-0266)
  • 199208 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5915-1)
  • 199212 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5917-1)
  • 199218 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-5927-1)
  • 199224 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-5934-1)
  • 199226 Ubuntu Security Notification for Linux kernel (GCP) Vulnerabilities (USN-5939-1)
  • 199230 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-5940-1)
  • 199239 Ubuntu Security Notification for Linux kernel (IBM) Vulnerabilities (USN-5951-1)
  • 199251 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5970-1)
  • 199258 Ubuntu Security Notification for Linux kernel (HWE) Vulnerabilities (USN-5979-1)
  • 199260 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5982-1)
  • 199261 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5984-1)
  • 199265 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5987-1)
  • 199267 Ubuntu Security Notification for Linux kernel (GCP) Vulnerabilities (USN-5991-1)
  • 199276 Ubuntu Security Notification for Linux kernel (BlueField) Vulnerabilities (USN-6000-1)
  • 199280 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6004-1)
  • 199300 Ubuntu Security Notification for Linux kernel (Qualcomm Snapdragon) Vulnerabilities (USN-6030-1)
  • 199502 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5975-1)
  • 199541 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-5924-1)
  • 199570 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5981-1)
  • 199587 Ubuntu Security Notification for Linux kernel (GCP) Vulnerabilities (USN-6009-1)
  • 241258 Red Hat Update for kernel security (RHSA-2023:1202)
  • 241260 Red Hat Update for kernel-rt (RHSA-2023:1203)
  • 241290 Red Hat Update for kpatch-patch (RHSA-2023:1435)
  • 241293 Red Hat Update for kpatch-patch (RHSA-2023:1471)
  • 241295 Red Hat Update for kernel-rt (RHSA-2023:1469)
  • 241298 Red Hat Update for kernel security (RHSA-2023:1470)
  • 241305 Red Hat Update for kernel security (RHSA-2023:1554)
  • 241308 Red Hat Update for kernel-rt (RHSA-2023:1556)
  • 241310 Red Hat Update for kernel-rt (RHSA-2023:1584)
  • 241315 Red Hat Update for kernel (RHSA-2023:1557)
  • 241316 Red Hat Update for kernel-rt (RHSA-2023:1560)
  • 241324 Red Hat Update for kernel security (RHSA-2023:1566)
  • 241327 Red Hat Update for kpatch-patch (RHSA-2023:1662)
  • 241328 Red Hat Update for kpatch-patch (RHSA-2023:1659)
  • 241329 Red Hat Update for kpatch-patch (RHSA-2023:1660)
  • 241604 Red Hat Update for kernel (RHSA-2023:1588)
  • 241606 Red Hat Update for kpatch-patch (RHSA-2023:1590)
  • 241646 Red Hat Update for kernel (RHSA-2023:1559)
  • 241674 Red Hat Update for kpatch-patch (RHSA-2023:1666)
  • 378468 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-20230042)
  • 378473 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2023:0021)
  • 378512 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2023:0042)
  • 610481 Google Android Devices May 2023 Security Patch Missing
  • 610482 Google Pixel Android April 2023 Security Patch Missing
  • 610485 Google Android May 2023 Security Patch Missing for Samsung
  • 610487 Google Android May 2023 Security Patch Missing for Huawei EMUI
  • 610493 Google Android June 2023 Security Patch Missing for Samsung
  • 673117 EulerOS Security Update for kernel (EulerOS-SA-2023-2152)
  • 753583 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0152-1)
  • 753684 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0394-1)
  • 753688 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0406-1)
  • 753709 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0433-1)
  • 753743 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0618-1)
  • 753745 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:0634-1)
  • 755900 SUSE Enterprise Linux Security Update for the Linux-RT Kernel (SUSE-SU-2023:0488-1)
  • 905357 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (13156)
  • 905373 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (13190)
  • 905387 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (13223)
  • 905397 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (13229)
  • 905539 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (13190-1)
  • 905948 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (13223-2)
  • 906114 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (13156-2)
  • 906385 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (13229-2)
  • 906594 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (13156-4)
  • 906597 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (13223-4)
  • 940966 AlmaLinux Security Update for kernel (ALSA-2023:1470)
  • 940967 AlmaLinux Security Update for kernel-rt (ALSA-2023:1469)
  • 940970 AlmaLinux Security Update for kernel (ALSA-2023:1566)
  • 940974 AlmaLinux Security Update for kernel-rt (ALSA-2023:1584)
  • 960891 Rocky Linux Security Update for kernel-rt (RLSA-2023:1469)
  • 960896 Rocky Linux Security Update for kernel (RLSA-2023:1470)
  • 960903 Rocky Linux Security Update for kernel (RLSA-2023:1566)
  • 960918 Rocky Linux Security Update for kernel-rt (RLSA-2023:1584)
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