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CVE Record

CVE-2022-48946: udf: Fix preallocation discarding at indirect extent boundary

In the Linux kernel, the following vulnerability has been resolved: udf: Fix preallocation discarding at indirect extent boundary When preallocation extent is the first one in the extent block, the code would corrupt extent tree header instead. Fix the problem and use udf_delete_aext() for deleting extent to avoid some code duplication.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel UDF filesystem bug where specific preallocation handling could corrupt UDF extent metadata. The sources do not provide CVSS, impact detail, or evidence of active exploitation. Business urgency depends on whether systems mount UDF media or images, especially from untrusted sources.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency based on available evidence. Escalate priority for endpoints, servers, or workflows that process untrusted UDF media or filesystem images.

Technical view

The resolved Linux kernel issue is in UDF extent handling. When a preallocation extent is first in an extent block, deletion logic could corrupt the extent tree header. Stable kernel commits replace that handling with udf_delete_aext(). The source bundle does not describe privilege impact, crashability, or data corruption scope beyond this code path.

Likely exposure

Exposure is most plausible on Linux systems that mount UDF filesystems, such as optical media or UDF disk images. The source lists Linux kernel versions and stable branch points as affected, but distribution package status must be verified with the relevant vendor.

Exploitation context

CISA KEV status is false in the bundle, and no cited source states active exploitation. The bundle also does not provide a public exploit, attack complexity, required privileges, or whether malicious media is sufficient to trigger the issue.

Researcher notes

Evidence is limited to the CVE text and Linux stable commits. The affected version list is broad and source formatting is sparse, so validate branch-specific fixes against vendor kernels before declaring exposure or closure.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable UDF fixes.
  • Check distribution advisories for exact patched package versions.
  • Prioritize systems that mount UDF media or disk images.
  • Restrict mounting of untrusted removable media where operationally feasible.
  • Monitor vendor guidance because no standalone workaround is named.

Validation and detection

  • Inventory Linux kernel versions across affected assets.
  • Identify systems with UDF filesystem support or UDF mount workflows.
  • Verify installed kernels include the relevant stable fix commit.
  • Confirm removable-media and disk-image handling policies are enforced.
  • Track distro security notes for CVE-2022-48946 package status.
Prepared
Confidence
medium
Sources
11

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.

ATT&CK lookup starting points

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CVE-2022-48946 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
3Timeline events
1ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2unaffected
LinuxLinux2.6.12, 0, 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.161, 5.15.85, 6.0.15, 6.1.1, 6.2affected
Weakness

CWE details

No CWE listed

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