CVE-2022-3635

Local code execution via teardown timer race

Published Oct 21, 2022 · Updated Apr 15, 2025

Use-after-free in the Linux kernel IDT 77252 ATM driver allows local users to crash the system or execute arbitrary code. idt77252_exit frees the device state without synchronously stopping tst_timer, allowing the timer handler to dereference the freed card object. Exploitation requires the affected ATM driver and a race between device teardown and the pending timer callback; the resulting memory corruption can crash the kernel or run code.

CVSS severity7.0
High
EPSS probability0.42%
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 kernel IDT 77252 ATM driver allows local users to crash the system or execute arbitrary code. idt77252_exit frees the device state without synchronously stopping tst_timer, allowing the timer handler to dereference the freed card object. Exploitation requires the affected ATM driver and a race between device teardown and the pending timer callback; the resulting memory corruption can crash the kernel or run code.

The record

CVE
CVE-2022-3635
Published
Oct 21, 2022
Updated
Apr 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=n/a

Published CVSS scores

7.0NIST National Vulnerability DatabaseCVSS: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

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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