CVE-2022-48770

Kernel crash via unchecked task_pt_regs return

Published Jun 20, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows local users to crash powerpc systems through a BPF task stack query. The __bpf_get_stack() path passes task_pt_regs() output to user-mode checking without first rejecting a NULL result for a kernel thread. Reaching the flaw requires local low-privileged access, a powerpc kernel thread target, and invocation of the BPF stack helper; the result is a kernel oops and service interruption.

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

NULL pointer dereference in the Linux kernel allows local users to crash powerpc systems through a BPF task stack query. The __bpf_get_stack() path passes task_pt_regs() output to user-mode checking without first rejecting a NULL result for a kernel thread. Reaching the flaw requires local low-privileged access, a powerpc kernel thread target, and invocation of the BPF stack helper; the result is a kernel oops and service interruption.

The record

CVE
CVE-2022-48770
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=5.9
  2. Affected versionversion=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <0bcd484587b3b3092e448d27dc369e347e1810c3
  3. Affected versionversion=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <b82ef4985a6d05e80f604624332430351df7b79a
  4. Affected versionversion=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <b992f01e66150fc5e90be4a96f5eb8e634c8249e
  5. Affected versionversion=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <ff6bdc205fd0a83bd365405d4e31fb5905826996

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <0bcd484587b3b3092e448d27dc369e347e1810c3; version=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <b82ef4985a6d05e80f604624332430351df7b79a; version=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <b992f01e66150fc5e90be4a96f5eb8e634c8249e; version=fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0 <ff6bdc205fd0a83bd365405d4e31fb5905826996

Published CVSS scores

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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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