CVE-2022-50384

Local kernel compromise via stale DMA-list entry

Published Sep 18, 2025 · Updated Sep 18, 2025

Use-after-free in affected Linux kernel versions allows local users to corrupt kernel memory through a failed VME DMA list insertion. In tsi148_dma_list_add, the err_dma path frees an entry without removing entry->list from list->entries, so later traversal dereferences stale storage. Reachability requires a PCI TSI148 VME bridge, local VME DMA access, and a dma_map_single failure; subsequent list operations expose kernel memory or trigger a kernel panic.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux kernel versions allows local users to corrupt kernel memory through a failed VME DMA list insertion. In tsi148_dma_list_add, the err_dma path frees an entry without removing entry->list from list->entries, so later traversal dereferences stale storage. Reachability requires a PCI TSI148 VME bridge, local VME DMA access, and a dma_map_single failure; subsequent list operations expose kernel memory or trigger a kernel panic.

The record

CVE
CVE-2022-50384
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2
  2. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <1f5661388f43df3ac106ce93e67d8d22b16a78ff
  3. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <357057ee55d3c99a5de5abe8150f7bca04f8e53b
  4. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <51c0ad3b7c5b01f9314758335a13f157b05fa56d
  5. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <5cc4eea715a3fcf4e516662f736dfee63979465f
  6. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <5d2b286eb034af114f67d9967fc3fbc1829bb712
  7. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <85db68fc901da52314ded80aace99f8b684c7815
  8. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <a45ba33d398a821147d7e5f16ead7eb125e331e2
  9. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <cf138759a7e92c75cfc1b7ba705e4108fe330edf
  10. Affected versionversion=b2383c90a9d691201b9aee557776694cde86a935 <e6b0adff99edf246ba1f8d464530a0438cb1cbda

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=b2383c90a9d691201b9aee557776694cde86a935 <1f5661388f43df3ac106ce93e67d8d22b16a78ff; version=b2383c90a9d691201b9aee557776694cde86a935 <357057ee55d3c99a5de5abe8150f7bca04f8e53b; version=b2383c90a9d691201b9aee557776694cde86a935 <51c0ad3b7c5b01f9314758335a13f157b05fa56d; version=b2383c90a9d691201b9aee557776694cde86a935 <5cc4eea715a3fcf4e516662f736dfee63979465f; version=b2383c90a9d691201b9aee557776694cde86a935 <5d2b286eb034af114f67d9967fc3fbc1829bb712; version=b2383c90a9d691201b9aee557776694cde86a935 <85db68fc901da52314ded80aace99f8b684c7815; version=b2383c90a9d691201b9aee557776694cde86a935 <a45ba33d398a821147d7e5f16ead7eb125e331e2; version=b2383c90a9d691201b9aee557776694cde86a935 <cf138759a7e92c75cfc1b7ba705e4108fe330edf; version=b2383c90a9d691201b9aee557776694cde86a935 <e6b0adff99edf246ba1f8d464530a0438cb1cbda

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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