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CVE Record

CVE-2022-48712: ext4: fix error handling in ext4_fc_record_modified_inode()

In the Linux kernel, the following vulnerability has been resolved: ext4: fix error handling in ext4_fc_record_modified_inode() Current code does not fully takes care of krealloc() error case, which could lead to silent memory corruption or a kernel bug. This patch fixes that. Also it cleans up some duplicated error handling logic from various functions in fast_commit.c file.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-48712 is a Linux kernel ext4 filesystem bug. A failed memory reallocation in ext4 fast commit handling could cause silent memory corruption or a kernel bug. The sources do not provide a CVSS score, confirmed exploitation, or a complete product matrix, so urgency should be based on kernel exposure and vendor advisories.

Executive priority

Track and patch through normal kernel maintenance unless vendor advisories rate your environment higher. Escalate priority for shared Linux platforms, critical storage workloads, or systems where kernel crashes create business disruption.

Technical view

The resolved kernel issue is in ext4_fc_record_modified_inode() in ext4 fast_commit.c. The prior error handling did not fully handle krealloc() failure, creating potential memory corruption or kernel fault conditions. Upstream stable commits are referenced as fixes. The CVE data lists Linux kernel versions and git commits, but version range interpretation is incomplete.

Likely exposure

Linux systems running affected kernel builds with ext4 filesystem functionality are the relevant exposure. Confirm impact through the operating system or distribution vendor because the provided CVE data does not give a clean affected-version range or distro package mapping.

Exploitation context

No active exploitation is indicated in the provided sources, and the CVE is not marked as CISA KEV. The sources describe a kernel reliability and memory corruption condition, but do not provide exploitability details or attacker prerequisites.

Researcher notes

Evidence is limited to the CVE record and upstream stable kernel commits. There is no CVSS, CWE, KEV listing, or public exploit evidence in the provided bundle. Treat affected-version assessment carefully and rely on distro backport advisories for operational decisions.

Mitigation direction

  • Apply kernel updates from your Linux distribution or vendor containing the referenced stable fixes.
  • Prioritize internet-facing, multi-user, and workload-dense Linux systems after vendor confirmation.
  • If immediate patching is not possible, monitor vendor guidance for supported mitigations.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, containers hosts, and appliances.
  • Check whether vendor advisories map your packages to CVE-2022-48712.
  • Confirm patched kernel builds include the referenced upstream stable commits.
  • Review crash or filesystem-related kernel logs for unusual ext4 errors.
Prepared
Confidence
medium
Sources
6

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2022-48712 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
2ADP providers
5Source 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2unaffected
LinuxLinux5.10, 0, 5.10.99, 5.15.22, 5.16.8, 5.17affected
Weakness

CWE details

No CWE listed

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