CVE-2026-98640: Linux kernel · HID: amd_sfh: Validate PCI BAR size before mapping
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ee25833f037fa22d23ffdbfeebabe3579e8a0346 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in ee25833f037fa22d23ffdbfeebabe3579e8a0346, dc687489131559ee52f447592f6d039a5a013061, 92bf2883da0306ab9d1eb794acd1058fc5088ebc +4
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel. The remediation involves verifying the PCI BAR 2 size is at least 128KB before mapping it. Users should update to a fixed kernel version containing the patch identified by the fixed commit hashes.
Description
A vulnerability in the Linux kernel's amd_sfh driver allows out-of-bounds memory access due to lack of validation of PCI BAR 2 size before mapping. This can cause a page fault during device probe if the BAR size is smaller than expected. The issue is fixed by verifying the BAR size is at least 128KB before mapping.
References
- git.kernel.org/stable/c/92bf2883da0306ab9d1eb794acd1058fc5088ebc (opens in a new tab)
- git.kernel.org/stable/c/7b3747d77767f066ccf4a9e8e3a8381643ab5368 (opens in a new tab)
- git.kernel.org/stable/c/5ff24aa7af0bca0780fe4e6effce902065f2c0a7 (opens in a new tab)
- git.kernel.org/stable/c/dc687489131559ee52f447592f6d039a5a013061 (opens in a new tab)
- git.kernel.org/stable/c/5f9e2ecb725adced013fbf5f94b9f185fad2e7d9 (opens in a new tab)
- git.kernel.org/stable/c/ee25833f037fa22d23ffdbfeebabe3579e8a0346 (opens in a new tab)
- git.kernel.org/stable/c/65bcc5f89704efe5b9d69d4ea2c1002d90c31382 (opens in a new tab)