CVE-2023-52871

Kernel driver-state corruption via second LLCC probe

Published May 21, 2024 · Updated Aug 5, 2026

Data corruption in the Qualcomm LLCC driver in Linux allows local users to corrupt kernel driver state when a second LLCC device probes. The llcc_probe path assigns per-device state to the global drv_data pointer before confirming that the pointer is unset, so even a failed second probe replaces the first device's state. Reachability requires a Qualcomm platform with a second LLCC device, and consequences beyond kernel driver-state corruption are not publicly documented.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data corruption in the Qualcomm LLCC driver in Linux allows local users to corrupt kernel driver state when a second LLCC device probes. The llcc_probe path assigns per-device state to the global drv_data pointer before confirming that the pointer is unset, so even a failed second probe replaces the first device's state. Reachability requires a Qualcomm platform with a second LLCC device, and consequences beyond kernel driver-state corruption are not publicly documented.

The record

CVE
CVE-2023-52871
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.19
  2. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <1143bfb9b055897975aeaea254da148e19524493
  3. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <3565684309e54fa998ea27f37028d67cc3e1dff2
  4. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <5e5b85ea0f4bc484bfe4cc73ead51fa48d2366a0
  5. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <995ee1e84e8db7fa5dcdde7dfe0bd7bb6f9bbb8c
  6. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <cc1a1dcb411fe224f48553cfdcdfe6e61395b69c
  7. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <f0ef883cae309bc5e8cdfcdbc1b4822732ce20a8
  8. Affected versionversion=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <f1a1bc8775b26345aba2be278118999e7f661d3d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <1143bfb9b055897975aeaea254da148e19524493; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <3565684309e54fa998ea27f37028d67cc3e1dff2; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <5e5b85ea0f4bc484bfe4cc73ead51fa48d2366a0; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <995ee1e84e8db7fa5dcdde7dfe0bd7bb6f9bbb8c; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <cc1a1dcb411fe224f48553cfdcdfe6e61395b69c; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <f0ef883cae309bc5e8cdfcdbc1b4822732ce20a8; version=a3134fb09e0bc5bee76e13bf863173b86f21cf87 <f1a1bc8775b26345aba2be278118999e7f661d3d

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

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