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CVE Record

CVE-2022-33103: Das U-Boot from v2020.10 to v2022.07-rc3 was discovered to contain an out-of-bounds write via the function...

Das U-Boot from v2020.10 to v2022.07-rc3 was discovered to contain an out-of-bounds write via the function sqfs_readdir().

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE describes a memory corruption flaw in Das U-Boot, a bootloader used in many embedded and appliance platforms. The reported issue is an out-of-bounds write in SquashFS directory handling. Business urgency depends on whether your products or devices boot with affected U-Boot versions and expose attacker-controlled SquashFS images during boot or update workflows.

Executive priority

Treat this as an exposure-discovery item first, not a confirmed enterprise-wide emergency. Prioritize inventory for embedded, appliance, and product firmware estates because bootloader flaws can be hard to patch and may affect recovery or update trust paths.

Technical view

CVE-2022-33103 affects Das U-Boot versions v2020.10 through v2022.07-rc3 and is reported as an out-of-bounds write in sqfs_readdir(). The source bundle does not provide CVSS, CWE, exploitability details, or affected CPEs. Debian later referenced the issue in an LTS security announcement, indicating downstream remediation tracking exists.

Likely exposure

Exposure is most likely in embedded devices, appliances, boards, or firmware images using affected Das U-Boot builds with SquashFS support. The provided sources do not identify specific vendors, models, packages, or deployment configurations.

Exploitation context

No active exploitation is stated in the provided sources, and the CVE is not marked as KEV. The bundle does not provide proof-of-concept details or exploitation prerequisites beyond the vulnerable sqfs_readdir() path.

Researcher notes

The public bundle is sparse: no CVSS, CWE, CPEs, exploit status, or detailed patch text is included. Analysis should focus on affected U-Boot version confirmation, SquashFS feature presence, and vendor-specific firmware lineage rather than assuming broad exploitability.

Mitigation direction

  • Inventory firmware and bootloader versions for Das U-Boot v2020.10 through v2022.07-rc3.
  • Check upstream U-Boot, Debian, and device vendor guidance for corrected builds.
  • Prioritize devices that process untrusted boot media, recovery images, or update packages.
  • Restrict physical and remote paths that can introduce untrusted boot or filesystem images.
  • Track vendor firmware releases before making production bootloader changes.

Validation and detection

  • Confirm whether deployed firmware includes Das U-Boot and SquashFS support.
  • Map each device or image to its exact U-Boot version.
  • Review SBOMs, build logs, or firmware manifests for affected version ranges.
  • Check vendor advisories for whether your exact device model is affected.
  • Verify remediation by confirming the vendor-corrected bootloader version is installed.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2022-33103 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.