VulnerabilityPublished 10 Jul 2025Updated 5 Nov 2026

CVE-2025-38320: Linux kernel · arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in 92750bfe7b0d8dbcaf578c091a65eda1c5f9ad38 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:33 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in 92750bfe7b0d8dbcaf578c091a65eda1c5f9ad38, 64773b3ea09235168a549a195cba43bb867c4a17, 422e565b7889ebfd9c8705a3fc786642afe61fca +5

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 92750bfe7b0d8dbcaf578c091a65eda1c5f9ad38	Fixed in 92750bfe7b0d8dbcaf578c091a65eda1c5f9ad38
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 64773b3ea09235168a549a195cba43bb867c4a17	Fixed in 64773b3ea09235168a549a195cba43bb867c4a17
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 422e565b7889ebfd9c8705a3fc786642afe61fca	Fixed in 422e565b7889ebfd9c8705a3fc786642afe61fca
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 67abac27d806e8f9d4226ec1528540cf73af673a	Fixed in 67abac27d806e8f9d4226ec1528540cf73af673a
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 39dfc971e42d886e7df01371cd1bef505076d84c	Fixed in 39dfc971e42d886e7df01371cd1bef505076d84c
LinuxLinux	Affected ≥ 0a8ea52c3eb157dd65e224fc95b7c9c99fcba9f7, < 22f935bc86bdfbde04009f05eee191d220cd8c89	Fixed in 22f935bc86bdfbde04009f05eee191d220cd8c89

AI-suggested

A patch is available and has been applied in the Linux kernel source code as indicated by multiple fixed commits. Users and administrators should update affected Linux kernel versions to the fixed versions referenced by the commits. Since this is a kernel-level issue, applying the official kernel updates is the recommended remediation. The vendor manages remediation for this cloud-hosted service if applicable.

Description

A stack-out-of-bounds read vulnerability was identified and fixed in the Linux kernel's arm64 ptrace subsystem within the function regs_get_kernel_stack_nth(). The issue was detected by KASAN (Kernel Address Sanitizer) and involves reading memory beyond the intended stack bounds. The fix involves using the READ_ONCE_NOCHECK() helper to prevent false positives from KASAN, ensuring safe stack reads. This vulnerability affects Linux kernel version 4.8 and has been patched in subsequent commits.

Impact

The vulnerability causes a stack-out-of-bounds read, which can lead to kernel crashes or undefined behavior. There is no indication of code execution or privilege escalation from the provided data. The issue is primarily a memory safety bug detected by KASAN, which could affect system stability or debugging tools relying on ptrace.

Summary

CVE-2025-38320 addresses a stack-out-of-bounds read in the Linux kernel arm64 ptrace implementation, specifically in the regs_get_kernel_stack_nth() function. KASAN detected an invalid read of 8 bytes at a stack address during ptrace operations. The root cause relates to how the function reads stack memory, which was previously flagged as out-of-bounds by KASAN despite the address being confirmed on the stack. The patch applies the READ_ONCE_NOCHECK() macro to silence KASAN warnings for this legitimate stack access, similar to a prior fix on the s390 architecture. The vulnerability affects Linux kernel version 4.8 and was fixed in multiple subsequent commits.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Nov 2026, 21:33 UTC

Technical details

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