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CVE Record

CVE-2022-48873: misc: fastrpc: Don't remove map on creater_process and device_release

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Don't remove map on creater_process and device_release Do not remove the map from the list on error path in fastrpc_init_create_process, instead call fastrpc_map_put, to avoid use-after-free. Do not remove it on fastrpc_device_release either, call fastrpc_map_put instead. The fastrpc_free_map is the only proper place to remove the map. This is called only after the reference count is 0.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48873 is a Linux kernel FastRPC bug where cleanup code could free or remove tracking data too early, creating a use-after-free risk. The public record does not provide a CVSS score, business impact rating, or evidence of active exploitation.

Executive priority

Do not treat this as a confirmed active incident from the provided evidence. Prioritize inventory and patch planning for Linux systems that use FastRPC, especially shared or high-value systems, because kernel use-after-free bugs can have serious consequences when reachable.

Technical view

The issue affects Linux kernel fastrpc map lifecycle handling. Error and device-release paths removed a map from the list directly; the fix uses fastrpc_map_put and leaves removal to fastrpc_free_map after the reference count reaches zero.

Likely exposure

Exposure is most likely on Linux systems running affected kernel lines where the fastrpc component is present or reachable. The source lists affected kernel versions and stable commit references, but does not identify distributions, devices, or configurations beyond Linux kernel FastRPC.

Exploitation context

The provided sources do not show KEV listing, public exploitation, exploit maturity, required privileges, or attack vector. Treat exploitation status as unconfirmed and avoid assuming internet exposure without local configuration evidence.

Researcher notes

The record describes a reference-counting and list-removal flaw in fastrpc_init_create_process and fastrpc_device_release. Evidence is limited to the CVE description and kernel stable commits; no CVSS, CWE, exploitability conditions, or distro-specific fixed versions are included.

Mitigation direction

  • Apply vendor kernel updates that include the referenced stable FastRPC fixes.
  • If no update is available, check vendor guidance for supported backports or mitigations.
  • Prioritize systems where fastrpc is enabled and local users or workloads are untrusted.
  • Track distribution advisories for package-specific fixed kernel versions.

Validation and detection

  • Inventory Linux kernel versions across affected assets.
  • Confirm whether fastrpc is built, loaded, or otherwise available on those systems.
  • Compare deployed kernels against vendor advisories and referenced stable commits.
  • Record systems requiring vendor backports or maintenance-window patching.
Prepared
Confidence
medium
Sources
7

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-2022-48873 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
6Source 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
LinuxLinuxb49f6d83e290f17e20f4e5cf31288d3bb4955ea6, b49f6d83e290f17e20f4e5cf31288d3bb4955ea6, b49f6d83e290f17e20f4e5cf31288d3bb4955ea6, b49f6d83e290f17e20f4e5cf31288d3bb4955ea6, b49f6d83e290f17e20f4e5cf31288d3bb4955ea6, aaf5aa44934ad069cac805923c49f6968b9a0d49unaffected
LinuxLinux5.2, 0, 5.4.230, 5.10.165, 5.15.90, 6.1.8, 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.