GCVE-1988-2026-0353
Vulnerability from gna-1988 – Published: 2026-09-11 07:55 – Updated: 2026-09-11 11:36
VLAI
EPSS
VEX
Title
ASUS bsitf.sys (CVE-2026-13585): Arbitrary Physical Memory Mapping in ASUS Business/Software Manager kernel driver
Summary
Hi all,
I'm disclosing a vulnerability (CVE-2026-13585) in the ASUS bsitf.sys /
AsusBSItf.sys kernel driver, shipped with ASUS Business Manager and
Software Manager. ASUS has assigned the CVE and published a vendor advisory
with countermeasures.
Summary: The driver exposes a device (\\.\bsitf, admin-required to open)
with an IOCTL that allocates a caller-specified amount of physically
contiguous kernel memory, maps it into the calling process, and returns
both the user-space pointer and the physical address, with no validation on
the requested size, no cap on allocation count, and no input checking.
Observed impact:
- Pool-exhaustion denial of service: uncapped allocations in a loop exhaust
NonPagedPool and BSOD the machine, reachable from any admin process.
- Physical address disclosure on every allocation, useful as an info-leak
primitive or for DMA-oriented attacks.
- On version 3.0.10.0 the pool type is executable (NonPagedPool), enabling
shellcode staging at a known kernel address (still requires a separate
control-flow bug). Later 3.1.x versions use NonPagedPoolNx, so this does
not apply there.
Affected versions tested: 3.0.10.0 (bsitf.sys), 3.1.10.0 and 3.1.25.0
(AsusBSItf.sys). All exhibit the same flaw.
Timeline:
- 2026-04-06: Discovered, PoC confirmed on Windows 11 24H2, reported to
ASUS PSIRT
- 2026-07-14: CVE assigned and case closed (CVE-2026-13585)
- 2026-07-15: Vendor advisory and countermeasures released
Full technical writeup and PoC: https://blog.ahmadz.ai/asus_bsitf_0_day_poc/
Regards,
Rehman Ahmadzai
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuln.freearchive.org/archive/full-disclos… | technical-descriptionexploit |
| https://seclists.org/fulldisclosure/2026/Jul/26 | technical-description |
| https://blog.ahmadz.ai/asus_bsitf_0_day_poc/ | |
| https://nmap.org/mailman/listinfo/fulldisclosure | |
| https://seclists.org/fulldisclosure/ |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Asus | bsitf.sys CVE-2026-13585 |
Affected:
unknown
|
guessed |
Relationships
analysis
GCVE-1988-2026-0353 (this record)
- related CVE-2026-13585
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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