VulnerabilityPublished 10 Jul 2025Updated 5 Nov 2026

CVE-2025-38345: Linux kernel · ACPICA: fix acpi operand cache leak in dswstate.c

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e0783910ca4368b01466bc8dcdcc13c3e0b7db53 : patch Linux kernel soon.

Data as of 5 Nov 2026, 21:33 UTC

Severity

High

Rated High 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 e0783910ca4368b01466bc8dcdcc13c3e0b7db53, 755a8006b76792922ff7b1c9674d8897a476b5d7, 156fd20a41e776bbf334bd5e45c4f78dfc90ce1c +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 ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < e0783910ca4368b01466bc8dcdcc13c3e0b7db53	Fixed in e0783910ca4368b01466bc8dcdcc13c3e0b7db53
LinuxLinux	Affected ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < 755a8006b76792922ff7b1c9674d8897a476b5d7	Fixed in 755a8006b76792922ff7b1c9674d8897a476b5d7
LinuxLinux	Affected ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < 156fd20a41e776bbf334bd5e45c4f78dfc90ce1c	Fixed in 156fd20a41e776bbf334bd5e45c4f78dfc90ce1c
LinuxLinux	Affected ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < 76d37168155880f2b04a0aad92ceb0f9d799950e	Fixed in 76d37168155880f2b04a0aad92ceb0f9d799950e
LinuxLinux	Affected ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < 64c4bcf0308dd1d752ef31d560040b8725e29984	Fixed in 64c4bcf0308dd1d752ef31d560040b8725e29984
LinuxLinux	Affected ≥ 773069d48030e670cf2032a13ddf16a2e0034df3, < 5a68893b594ee6ce0efce5f74c07e64e9dd0c2c4	Fixed in 5a68893b594ee6ce0efce5f74c07e64e9dd0c2c4

AI-suggested

A patch has been developed and merged into the Linux kernel to fix the ACPI operand cache leak. Users and administrators should update their Linux kernel to a fixed version containing the referenced commits (e0783910ca4368b01466bc8dcdcc13c3e0b7db53 and others). No additional mitigation steps are indicated or required beyond applying the official fix.

Description

CVE-2025-38345 is a vulnerability in the Linux kernel's ACPICA component where an ACPI operand cache leak occurs in dswstate.c. This leak happens during early termination of ACPI functions caused by malicious ACPI tables, leading to memory not being properly freed. The leak can expose kernel memory locations in stack dumps on older kernels (<= 4.9), potentially aiding attackers in bypassing kernel ASLR protections. A patch has been developed to fix this issue.

Impact

The vulnerability causes a memory leak of ACPI operand cache objects during early termination of ACPI functions. On affected older Linux kernels (<= 4.9), this leak can reveal kernel memory addresses in stack dumps, potentially allowing attackers to bypass kernel ASLR protections. This exposure increases the risk of privilege escalation or other kernel-level attacks by providing attackers with sensitive memory layout information.

Summary

The vulnerability involves an ACPI operand cache leak in the Linux kernel's ACPICA implementation, specifically in the dswstate.c file. The root cause is a miscalculation of the stack top in the acpi_ds_obj_stack_pop_and_delete() function, which incorrectly assumes the top of the stack is at index 0, whereas acpi_ds_obj_stack_push() uses walk_state->operand_index. This discrepancy causes memory allocated for ACPI operands to leak during early termination of ACPI functions triggered by malicious ACPI tables. The leak results in kernel memory locations being revealed in stack dumps on kernels version 4.9 and earlier, which could be exploited to defeat kernel Address Space Layout Randomization (ASLR). Multiple commits have been made to fix this issue in the Linux kernel.

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Exploitation evidence

What to do

Affected software

Description

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

Technical details

References

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