CVE-2026-31751
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
comedi: dt2815: add hardware detection to prevent crash
In the Linux kernel, the following vulnerability has been resolved: comedi: dt2815: add hardware detection to prevent crash The dt2815 driver crashes when attached to I/O ports without actual hardware present. This occurs because syzkaller or users can attach the driver to arbitrary I/O addresses via COMEDI_DEVCONFIG ioctl. When no hardware exists at the specified port, inb() operations return 0xff (floating bus), but outb() operations can trigger page faults due to undefined behavior, especially under race conditions: BUG: unable to handle page fault for address: 000000007fffff90 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page RIP: 0010:dt2815_attach+0x6e0/0x1110 Add hardware detection by reading the status register before attempting any write operations. If the read returns 0xff, assume no hardware is present and fail the attach with -ENODEV. This prevents crashes from outb() operations on non-existent hardware.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 8d63161837f1bf8810dbcd2a583c2bbf5ca6d733 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | d2a786efdb9971f2a647724625da5bbecc994dc9 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 0dcf33994b8dcf3db36530fb7e2cf9f89e5cbac3 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | d5d9df8b08d68d083ac57abc2c887dfb1f31af63 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 65c528fbeddd88478c210052f6c7b21be4973156 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 34c8b3a91bdfbe4573650b4cd750ef639101fdc5 | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 34b13250c618d7441508c6ef369144aa8a9b9bfa | Unavailable | None listed |
| d6a929b7608ae157cef86d00cc580d1038f0b985 | affected | git | 93853512f565e625df2397f0d8050d6aafd7c3ad | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.30 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.30 | Unavailable | None listed |
| 5.10.253 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.168 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.134 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.81 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.22 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.12 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |