Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can let an invalid camera/media format setting corrupt stored size values, leading to excessive memory allocation and a kernel crash. The public record describes a local reliability impact in the Intel IPU3 media driver, not remote compromise or confirmed exploitation.
Executive priority
Treat as a targeted kernel maintenance item, not an emergency internet-facing exposure. Patch affected Linux endpoints or appliances during the next appropriate update cycle, with higher priority for systems relying on Intel IPU3 camera/media functions.
Technical view
The vulnerable intel-ipu3 staging media driver overwrote prior valid frame sizes after set_fmt errors. The CVE text reports v4l2-compliance allocating 4 GiB and triggering SW-IOMMU exhaustion followed by a general protection fault. The fix preserves previous sizes when set_fmt fails.
Likely exposure
Exposure appears limited to Linux systems running affected kernels with the intel-ipu3 media driver path present or enabled. The provided data lists affected Linux versions and stable commits, but does not identify distributions, configurations, or reachable attack surfaces.
Exploitation context
CISA KEV status is false in the supplied bundle. No cited source reports active exploitation. The available evidence shows a reproducible compliance-test crash condition, but not a weaponized exploit or remote attack path.
Researcher notes
The source bundle lacks CVSS, CWE, distro advisories, and detailed privilege requirements. Analysis should stay close to the kernel commit behavior: failed set_fmt must not replace known-good sizes with invalid configuration values.
Mitigation direction
- Apply Linux kernel or distribution updates containing the referenced stable fixes.
- Prioritize systems using Intel IPU3 camera or media processing hardware.
- Check vendor kernel advisories for exact fixed package versions.
- If updates are unavailable, follow vendor guidance for interim controls.
- Track this as reliability and local denial-of-service risk unless new evidence emerges.
Validation and detection
- Inventory Linux kernel versions against the affected ranges in the CVE record.
- Confirm installed kernel source or package includes one referenced stable commit.
- Identify whether intel-ipu3 or ipu3-imgu devices are present and enabled.
- Review kernel logs for ipu3-imgu, SW-IOMMU exhaustion, or general protection faults.
- Document distribution-specific fixed versions once vendor advisories are checked.
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-2021-46943 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/a03fb1e8a110658215a4cefc3e2ad53279e496a6CVE reference, Linux
- https://git.kernel.org/stable/c/c6b81b897f6f9445d57f8d47c4e060ec21556137CVE reference, Linux
- https://git.kernel.org/stable/c/34892ea938387d83ffcfb7775ec55f0f80767916CVE reference, Linux
- https://git.kernel.org/stable/c/6fb617e37a39db0a3eca4489431359d0bdf3b9bcCVE reference, Linux
- https://git.kernel.org/stable/c/ad91849996f9dd79741a961fd03585a683b08356CVE 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.