CVE-2022-48791

Kernel code execution via stale TMF task pointer

Published Jul 16, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux pm8001 SCSI driver allows local users with device access to execute kernel code or crash the host. A TMF timeout frees sas_task in pm8001_exec_internal_tmf_task but leaves ccb->task pointing to it, so a later mpi_ssp_completion dereferences freed memory. Reachability requires local I/O access to storage backed by a pm8001 SAS controller and a task-management timeout; no victim interaction is required.

CVSS severity7.8
High
EPSS probability0.25%
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 the Linux pm8001 SCSI driver allows local users with device access to execute kernel code or crash the host. A TMF timeout frees sas_task in pm8001_exec_internal_tmf_task but leaves ccb->task pointing to it, so a later mpi_ssp_completion dereferences freed memory. Reachability requires local I/O access to storage backed by a pm8001 SAS controller and a task-management timeout; no victim interaction is required.

The record

CVE
CVE-2022-48791
Published
Jul 16, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 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=5.10.61 <5.10.102
  2. Affected versionversion=5.13.13 <5.14
  3. Affected versionversion=5.14
  4. Affected versionversion=968ee9176a4489ce6d5ee54ff88dadfbff9b95f4 <d872e7b5fe38f325f5206b6872746fa02c2b4819
  5. Affected versionversion=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <3c334cdfd94945b8edb94022a0371a8665b17366
  6. Affected versionversion=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <510b21442c3a2e3ecc071ba3e666b320e7acdd61
  7. Affected versionversion=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <61f162aa4381845acbdc7f2be4dfb694d027c018
  8. Affected versionversion=fa3c19ceaa8b4b7c29d710c2c407df57d256a6c5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10.61 <5.10.102; version=5.13.13 <5.14; version=5.14; version=968ee9176a4489ce6d5ee54ff88dadfbff9b95f4 <d872e7b5fe38f325f5206b6872746fa02c2b4819; version=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <3c334cdfd94945b8edb94022a0371a8665b17366; version=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <510b21442c3a2e3ecc071ba3e666b320e7acdd61; version=d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1 <61f162aa4381845acbdc7f2be4dfb694d027c018; version=fa3c19ceaa8b4b7c29d710c2c407df57d256a6c5

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0SUSECVSS:3.1/AV:L/AC:H/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
T1499.004Application or System Exploitation
T1068Exploitation for Privilege Escalation

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

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Your stack

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