CVE-2022-1462Public exploit

Kernel memory disclosure and crash via TTY race

Published May 31, 2022 · Updated Aug 3, 2024

An out-of-bounds read in the Linux kernel TTY subsystem allows local users to disclose kernel memory or crash the system via ioctl races. Concurrent TIOCSTI and TCXONC operations can make tty_flip_buffer_push lower the buffer commit position, so flush_to_ldisc computes a negative count and reads beyond the slab buffer. Exploitation requires local access and winning the race; successful attempts expose random kernel data or interrupt service by crashing the host.

CVSS severity6.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in the Linux kernel TTY subsystem allows local users to disclose kernel memory or crash the system via ioctl races. Concurrent TIOCSTI and TCXONC operations can make tty_flip_buffer_push lower the buffer commit position, so flush_to_ldisc computes a negative count and reads beyond the slab buffer. Exploitation requires local access and winning the race; successful attempts expose random kernel data or interrupt service by crashing the host.

The record

CVE
CVE-2022-1462
Published
May 31, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=no information yet

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=no information yet

Published CVSS scores

6.3NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
3.3NIST NVDAV:L/AC:M/Au:N/C:P/I:N/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

Public exploit references

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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