High severity · published Jan 30, 2023
CVE-2023-0266
Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
In wildKEV
7.0
CVSS
3.7%
EPSS
Yes
On KEV
Description
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
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildYes
CISA KEVListed Mar 30, 2023
Federal remediation dueApr 20, 2023
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.14 before 56b88b50565cd8b946a2d00b0c83927b7ebb055e · source: vendor, NVD, KEV
DL
Debian Linux · Debian
10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-0266
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-0266
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
github.com
https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1
git.kernel.org
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
github.com
https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
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