CVE-2026-98428 (GCVE-0-2026-98428)

Vulnerability from cvelistv5 – Published: 2026-10-14 13:27 – Updated: 2026-10-26 06:55
VLAI
Title
ALSA: usb: 6fire: Avoid embedded URBs
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: 6fire: Avoid embedded URBs The USB 6fire driver uses URBs embedded in different structs for PCM, MIDI and communication, and this is basically a buggy implementation nowadays; since a URB is managed with a refcount, this may lead to a UAF when the URB is released asynchronously. For addressing the problem, this patch converts those embedded URBs to ones that are properly allocated via usb_alloc_urb(). The pcm_urb.packets[] is gone, as it's allocated by usb_alloc_urb(), hence it's found in urb.iso_frame_desc[] instead. The conversions are rather straightforward; each embedded struct urb is changed to a pointer, and its callers are updated accordingly. The resource for those structs are released in the common destructor functions (usb6fire_comm_free(), etc), which are called at both the init error path and the disconnect. No functional changes, only compile-tested.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < 3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a (git)
Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < 8b8559aeaba2e51cfee1779b2383b085991f7d81 (git)
Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < 52a43c2d57e774489ac3fbbac06ff02f19bd9a52 (git)
Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < 999f433c09e4668412bd68ca207ae2b4af863862 (git)
Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < d181434549b3da668110a25d743848cce9897f4e (git)
Affected: c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 , < 9fe49dbc023e82dfaee7b245997d820d01742a9a (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.39
Unaffected: 0 , < 2.6.39 (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb: 6fire: Avoid embedded URBs\n\nThe USB 6fire driver uses URBs embedded in different structs for PCM,\nMIDI and communication, and this is basically a buggy implementation\nnowadays; since a URB is managed with a refcount, this may lead to a\nUAF when the URB is released asynchronously.\n\nFor addressing the problem, this patch converts those embedded URBs to\nones that are properly allocated via usb_alloc_urb().  The\npcm_urb.packets[] is gone, as it\u0027s allocated by usb_alloc_urb(), hence\nit\u0027s found in urb.iso_frame_desc[] instead.\n\nThe conversions are rather straightforward; each embedded struct urb\nis changed to a pointer, and its callers are updated accordingly.\nThe resource for those structs are released in the common destructor\nfunctions (usb6fire_comm_free(), etc), which are called at both the\ninit error path and the disconnect.\n\nNo functional changes, only compile-tested."
        }
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}



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