CVE-2023-53729

Kernel memory corruption via oversized QMI string

Published Oct 22, 2025 · Updated Oct 22, 2025

Out-of-bounds write in the Qualcomm QMI decoder in Linux allows local users to corrupt kernel memory via a maximum-length TLV string. The decoder accepts a string whose length includes the extra terminator slot, then appends a null character beyond the destination buffer. Low-privileged local access and a reachable Qualcomm QMI decoding path are required; the record establishes neither code execution nor privilege escalation.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Qualcomm QMI decoder in Linux allows local users to corrupt kernel memory via a maximum-length TLV string. The decoder accepts a string whose length includes the extra terminator slot, then appends a null character beyond the destination buffer. Low-privileged local access and a reachable Qualcomm QMI decoding path are required; the record establishes neither code execution nor privilege escalation.

The record

CVE
CVE-2023-53729
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record 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=4.16
  2. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <22ee7c9c7f381be178b4457bc54530002e08e938
  3. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <2ccab9f82772ead618689d17dbc6950d6bd1e741
  4. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <64c5e916fabe5ef7bef0210b8a59fa8941ee1b8e
  5. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <6b58859e7c4ac357517a59f0801e8ce1b58a8ee2
  6. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <8d207400fd6b79c92aeb2f33bb79f62dff904ea2
  7. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <b2f39b813d1eed4a522428d1e6acd7dfe9b81579
  8. Affected versionversion=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <f6250ecb7fbb934b89539e7e2ba6c1d8555c0975

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <22ee7c9c7f381be178b4457bc54530002e08e938; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <2ccab9f82772ead618689d17dbc6950d6bd1e741; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <64c5e916fabe5ef7bef0210b8a59fa8941ee1b8e; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <6b58859e7c4ac357517a59f0801e8ce1b58a8ee2; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <8d207400fd6b79c92aeb2f33bb79f62dff904ea2; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <b2f39b813d1eed4a522428d1e6acd7dfe9b81579; version=9b8a11e82615274d4133aab3cf5aa1c59191f0a2 <f6250ecb7fbb934b89539e7e2ba6c1d8555c0975

Published CVSS scores

7.8Linux CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5SUSECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/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

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

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Your stack

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