Security readout for executives and security teams
Plain-English summary
This is a Linux kernel graphics-driver locking bug in the gma500 DRM code. Under the affected page-flip path, the kernel could enter an invalid sleep state, producing warnings and low-impact confidentiality, integrity, and availability risk per CVSS. It is local-access only and not listed as known exploited in the provided sources.
Executive priority
Treat as a moderate maintenance patch, not an emergency internet-exposure event. Prioritize systems with local users and affected graphics hardware, then fold remaining fixes into normal kernel update cycles once vendor guidance confirms coverage.
Technical view
gma_crtc_page_flip() held event_lock while calling mode_set_base(), which can take a ww_mutex and sleep. The fix releases the spinlock before mode_set_base() and reacquires it only to clear page_flip_event on error. The provided CVSS vector is AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the gma500 DRM graphics driver path reachable. Headless systems or systems not using this driver are less likely exposed, but distribution backports may affect version assessment.
Exploitation context
The bundle does not show KEV listing or cited active exploitation. The CVSS vector indicates a local, low-privilege attacker model with no user interaction, so risk is most relevant on shared or user-accessible Linux systems using the affected graphics stack.
Researcher notes
The source evidence is kernel-resolution text and stable commit references. It identifies the locking flaw and fix approach but does not provide CWE mapping, exploitation evidence, or distribution-specific fixed package versions. Validate exposure against actual kernel configuration and downstream backports.
Mitigation direction
- Update to a Linux kernel build containing the referenced stable fixes.
- Check your Linux distribution advisory for exact backported fixed versions.
- Prioritize shared workstations or appliances using the gma500 DRM driver.
- Limit untrusted local user access on affected systems until patched.
Validation and detection
- Inventory Linux hosts for affected kernel builds and enabled gma500 DRM support.
- Confirm whether vendor kernels include one of the referenced stable commits.
- Review kernel logs for the reported invalid-context sleep warning pattern.
- Verify patched systems no longer expose the affected driver revision.
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.
CVE-2022-48634 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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:L/I:L/A:L1.83.4CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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/c5812807e416618477d1bb0049727ce8bb8292fdCVE reference, Linux
- https://git.kernel.org/stable/c/e5ae504c8623476e13032670f1a6d6344d53ec9bCVE reference, Linux
- https://git.kernel.org/stable/c/a6ed7624bf4d0a32f2631e74828bca7b7bf15afdCVE reference, Linux
- https://git.kernel.org/stable/c/63e37a79f7bd939314997e29c2f5a9f0ef184281CVE 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.