CVE-2024-35935

Kernel-address disclosure or crash via path underflow

Published May 19, 2024 · Updated May 12, 2026

Path-buffer underflow in Linux kernel btrfs send before 6.9 allows local users to read kernel addresses or crash the kernel. The iterate_inode_ref() path builder invokes BUG_ON when a reconstructed inode-reference path starts before its buffer instead of returning an error. Low-privileged local access and a btrfs send path that underflows the reconstruction buffer are required; no integrity impact is reported.

CVSS severity3.3
Low
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

Path-buffer underflow in Linux kernel btrfs send before 6.9 allows local users to read kernel addresses or crash the kernel. The iterate_inode_ref() path builder invokes BUG_ON when a reconstructed inode-reference path starts before its buffer instead of returning an error. Low-privileged local access and a btrfs send path that underflows the reconstruction buffer are required; no integrity impact is reported.

The record

CVE
CVE-2024-35935
Published
May 19, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-124, CWE-209
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=31db9f7c23fbf7e95026143f79645de6507b583b <024529c27c8b4b273325a169e078337c8279e229; version=31db9f7c23fbf7e95026143f79645de6507b583b <03938619a1e718b6168ae4528e1b0f979293f1a5; version=31db9f7c23fbf7e95026143f79645de6507b583b <2f6174fd4ccf403b42b3d5f0d1b6b496a0e5330a; version=31db9f7c23fbf7e95026143f79645de6507b583b <3c6ee34c6f9cd12802326da26631232a61743501; version=31db9f7c23fbf7e95026143f79645de6507b583b <4720d590c4cb5d9ffa0060b89743651cc7e995f9; version=31db9f7c23fbf7e95026143f79645de6507b583b <9ae356c627b493323e1433dcb27a26917668c07c; version=31db9f7c23fbf7e95026143f79645de6507b583b <be2b6bcc936ae17f42fff6494106a5660b35d8d3; version=31db9f7c23fbf7e95026143f79645de6507b583b <c1363ed8867b81ea169fba2ccc14af96a85ed183; version=3.6

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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-124Buffer Underwrite ('Buffer Underflow')
CWE-209Generation of Error Message Containing Sensitive Information

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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