Security readout for executives and security teams
Plain-English summary
CVE-2022-50359 is a Linux kernel bug in the cx88 media driver. A local user or process can trigger a kernel crash if the affected driver path is reachable. The main business impact is service disruption, not data theft or privilege escalation, based on the published CVSS vector.
Executive priority
Treat as a normal-priority availability fix unless affected media-driver systems support critical workloads. Patch during the next maintenance cycle, with faster action for shared, multi-user, or uptime-sensitive Linux systems where cx88 is enabled.
Technical view
The cx88 driver did not check whether cx88_risc_buffer() failed during buffer preparation. That could leave an empty buffer and later cause a null pointer dereference in buffer_queue(). The issue is classified as CWE-476 and scored CVSS 3.1 5.5: local, low complexity, low privileges, high availability impact.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions where the cx88 media driver is present and usable. Systems without this driver loaded or accessible are less likely exposed. Distribution kernel backports may change fixed-status conclusions.
Exploitation context
The CVE data does not indicate active exploitation, and it is not listed as KEV in the provided bundle. The attack vector is local with low privileges and no user interaction. The described outcome is a kernel fault or denial of service.
Researcher notes
Affected-version data is broad and commit-based, so validate against vendor kernel trees and backports. The upstream fix adds return-value checking for cx88_risc_buffer(). Avoid relying only on mainline version numbers for enterprise distributions.
Mitigation direction
- Apply Linux kernel updates containing the referenced stable fixes.
- Check your Linux distribution advisory for backported fixes.
- Prioritize systems where cx88 media hardware or drivers are enabled.
- If updates are delayed, review vendor guidance for temporary risk reduction.
Validation and detection
- Inventory running kernel versions across Linux assets.
- Check whether the cx88 driver is present, loaded, or packaged.
- Compare installed kernels against distro advisories and fixed stable commits.
- Review crash logs for null-pointer dereference traces involving buffer_queue or cx88.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-50359 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1CVE reference, Linux
- https://git.kernel.org/stable/c/10c99d1c46ea9cd940029e17bab11d021f315c21CVE reference, Linux
- https://git.kernel.org/stable/c/4befc7ffa18ef9a4b70d854465313a345a06862fCVE reference, Linux
- https://git.kernel.org/stable/c/9181af2dbf06e7f432e5dbe88d10b22343e851b9CVE reference, Linux
- https://git.kernel.org/stable/c/c2257c8a501537afab276c306cb717b7260276e1CVE reference, Linux
- https://git.kernel.org/stable/c/6f21976095c1e92454ab030976f95f40d652351bCVE reference, Linux
- https://git.kernel.org/stable/c/704838040f3bdb4aa07ff4f26505a666a3defcfeCVE reference, Linux
- https://git.kernel.org/stable/c/644d5a87ab1863eb606526ea743021752a17e9cbCVE reference, Linux
- https://git.kernel.org/stable/c/2b064d91440b33fba5b452f2d1b31f13ae911d71CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.