CVE-2026-31749 (GCVE-0-2026-31749)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-01 14:14
VLAI?
Title
comedi: ni_atmio16d: Fix invalid clean-up after failed attach
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: ni_atmio16d: Fix invalid clean-up after failed attach If the driver's COMEDI "attach" handler function (`atmio16d_attach()`) returns an error, the COMEDI core will call the driver's "detach" handler function (`atmio16d_detach()`) to clean up. This calls `reset_atmio16d()` unconditionally, but depending on where the error occurred in the attach handler, the device may not have been sufficiently initialized to call `reset_atmio16d()`. It uses `dev->iobase` as the I/O port base address and `dev->private` as the pointer to the COMEDI device's private data structure. `dev->iobase` may still be set to its initial value of 0, which would result in undesired writes to low I/O port addresses. `dev->private` may still be `NULL`, which would result in null pointer dereferences. Fix `atmio16d_detach()` by checking that `dev->private` is valid (non-null) before calling `reset_atmio16d()`. This implies that `dev->iobase` was set correctly since that is set up before `dev->private`.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < a01dd339ea6ac58b0967a50085622a6017351140 (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < 933a2d6a95f9bfb203e562c9be1dd990c735535c (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < 5d8d88c8c0eec230de8f1f60e0920a4337939a88 (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < f517646e008fe99ca1800601cd011b110f8684ae (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < 3848ae00b1642e2c98ff8cbfd2d3b38c6f53b5c3 (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < 43c68a2c7cc35b7c2a83c285cb4ad3d472b8caa2 (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < d07d97ca4f7fac467cdcf4a012690853958b7e89 (git)
Affected: 2323b276308a5da5774b778f39c7fd94b2a3022a , < 101ab946b79ad83b36d5cfd47de587492a80acf0 (git)
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    Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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            "drivers/comedi/drivers/ni_atmio16d.c"
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}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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