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CVE Record

CVE-2022-48924: thermal: int340x: fix memory leak in int3400_notify()

In the Linux kernel, the following vulnerability has been resolved: thermal: int340x: fix memory leak in int3400_notify() It is easy to hit the below memory leaks in my TigerLake platform: unreferenced object 0xffff927c8b91dbc0 (size 32): comm "kworker/0:2", pid 112, jiffies 4294893323 (age 83.604s) hex dump (first 32 bytes): 4e 41 4d 45 3d 49 4e 54 33 34 30 30 20 54 68 65 NAME=INT3400 The 72 6d 61 6c 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 rmal.kkkkkkkkkk. backtrace: [<ffffffff9c502c3e>] __kmalloc_track_caller+0x2fe/0x4a0 [<ffffffff9c7b7c15>] kvasprintf+0x65/0xd0 [<ffffffff9c7b7d6e>] kasprintf+0x4e/0x70 [<ffffffffc04cb662>] int3400_notify+0x82/0x120 [int3400_thermal] [<ffffffff9c8b7358>] acpi_ev_notify_dispatch+0x54/0x71 [<ffffffff9c88f1a7>] acpi_os_execute_deferred+0x17/0x30 [<ffffffff9c2c2c0a>] process_one_work+0x21a/0x3f0 [<ffffffff9c2c2e2a>] worker_thread+0x4a/0x3b0 [<ffffffff9c2cb4dd>] kthread+0xfd/0x130 [<ffffffff9c201c1f>] ret_from_fork+0x1f/0x30 Fix it by calling kfree() accordingly.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48924 is a Linux kernel memory leak in the int340x thermal driver. The source shows leaked small allocations during int3400_notify() on a TigerLake platform. Business risk is mainly potential stability or resource exhaustion on affected systems, but public severity, CVSS, and exploitation evidence are not provided.

Executive priority

Treat this as routine kernel hygiene unless vendor guidance elevates it. There is no supplied evidence of active exploitation or high severity, but affected systems should still receive normal kernel maintenance to reduce stability risk.

Technical view

The bug is in Linux thermal int340x handling: int3400_notify() allocates formatted event data and failed to free it. The upstream fix calls kfree() appropriately. The CVE record lists multiple affected Linux kernel versions, including 4.14 through 5.17-era entries, with stable kernel commit references for fixes.

Likely exposure

Exposure is most plausible on Linux systems using the int3400/int340x thermal driver, especially Intel platforms similar to the TigerLake system cited. The provided data does not identify distributions, device models, or package versions, so organizations should map kernel package status through vendor advisories.

Exploitation context

No active exploitation is supported by the supplied sources. The CVE is not listed as KEV in the bundle. The available evidence describes a memory leak observed through kernel leak reporting, not a public attack chain or remote exploitation path.

Researcher notes

Evidence is narrow: a memory leak in int3400_notify(), observed on TigerLake, fixed by adding kfree(). The bundle lacks CVSS, CWE, proof of exploitability, and distribution-specific package mapping. Avoid over-scoping beyond Linux kernels and the int340x thermal path.

Mitigation direction

  • Apply Linux kernel updates that include the referenced stable fixes.
  • Check your Linux distribution advisory for backported package versions.
  • Prioritize systems where int3400_thermal or int340x thermal support is present.
  • Track vendor guidance if you cannot immediately update kernels.

Validation and detection

  • Inventory Linux kernel versions across managed assets.
  • Check whether int3400_thermal or related int340x drivers are loaded.
  • Compare installed kernel packages against vendor fixed versions.
  • Review kernel logs or leak reports for repeated int3400_notify() leaks.
Prepared
Confidence
medium
Sources
9

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-2022-48924 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
8Source 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
LinuxLinux38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0, 38e44da591303d08b0d965a033e11ade284999d0unaffected
LinuxLinux4.14, 0, 4.14.274, 4.19.237, 5.4.188, 5.10.103, 5.15.26, 5.16.12, 5.17affected
Weakness

CWE details

No CWE listed

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