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CVE Record

CVE-2022-48782: mctp: fix use after free

In the Linux kernel, the following vulnerability has been resolved: mctp: fix use after free Clang static analysis reports this problem route.c:425:4: warning: Use of memory after it is freed trace_mctp_key_acquire(key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ When mctp_key_add() fails, key is freed but then is later used in trace_mctp_key_acquire(). Add an else statement to use the key only when mctp_key_add() is successful.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48782 is a Linux kernel memory-safety bug in the MCTP networking code. A failed internal operation can free a key and then still reference it. The source bundle provides fixes but no severity score or exploitation evidence, so urgency depends on whether affected kernel versions are present in your environment.

Executive priority

Treat this as a patch-management item, not an emergency, unless asset inventory shows affected kernels in sensitive or exposed roles. The lack of severity and exploitation data prevents a stronger risk claim from the supplied evidence.

Technical view

The issue is a use-after-free in Linux kernel MCTP route handling. When mctp_key_add() fails, key is freed and later passed to trace_mctp_key_acquire(). The upstream fix adds control flow so the trace call only uses the key after mctp_key_add() succeeds.

Likely exposure

Exposure appears limited to systems running affected Linux kernel versions with the relevant MCTP code present. The bundle identifies Linux 5.16-era versions and stable fixes, but does not provide distribution package mappings or configuration prerequisites.

Exploitation context

The bundle does not show active exploitation, and KEV status is false. The description says Clang static analysis reported the issue. No public exploit status, attack vector, privilege requirement, or real-world abuse evidence is provided.

Researcher notes

Key facts are source-limited: use-after-free, MCTP route.c, static-analysis finding, and two stable commit references. The bundle lacks CVSS, CWE, exploitability detail, distro mappings, and configuration conditions, so validation should focus on kernel provenance and backport evidence.

Mitigation direction

  • Update affected Linux kernels through the normal vendor or distribution channel.
  • Confirm the update includes one of the referenced stable kernel fixes.
  • Check Linux distribution advisories for package-specific fixed versions.
  • If patching is delayed, follow vendor guidance for temporary risk reduction.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Compare running kernels against vendor advisories and the referenced stable commits.
  • Verify patched systems boot into the updated kernel, not only install it.
  • Review kernel build or package notes for MCTP-related backports.
Prepared
Confidence
medium
Sources
4

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-2022-48782 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
2ADP providers
3Source 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
LinuxLinux4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899, 4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899unaffected
LinuxLinux5.16, 0, 5.16.11, 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.