{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  firewire: ohci: fix NULL pointer dereference in ar_context_release  During the error handling path of the driver's probe function, a NULL pointer dereference can occur in ar_context_release().  When pci_probe() fails early (e.g., if pcim_enable_device() or MMIO mapping fails), the devres cleanup mechanism invokes release_ohci(). This function unconditionally calls ar_context_release() to clean up the asynchronous receive contexts. However, if ar_context_init() was not yet called, ctx-\u003eohci remains NULL (as the fw_ohci structure is zero-initialized by devres_alloc()).  ar_context_release() immediately dereferences ctx-\u003eohci to get the dev pointer before checking if the context was actually initialized, leading to a crash:  Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] RIP: 0010:ar_context_release+0x3f/0x380 drivers/firewire/ohci.c:543 Call Trace:  release_ohci+0x3f/0x60 drivers/firewire/ohci.c:3567  release_nodes drivers/base/devres.c:546 [inline]  devres_release_all+0x1a8/0x260 drivers/base/devres.c:576  device_unbind_cleanup drivers/base/dd.c:597 [inline]  really_probe+0x451/0xae0 drivers/base/dd.c:772  To fix this, move the assignment of the dev pointer after the !ctx-\u003ebuffer check. If ctx-\u003ebuffer is NULL, it indicates that the context was never successfully initialized and there is nothing to release, safely avoiding the dereference of the uninitialized ctx-\u003eohci pointer.",
  "id": "DEBIAN-CVE-2026-74734",
  "modified": "2026-09-14T16:47:50.600411215Z",
  "published": "2026-08-26T15:16:51.927Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-74734"
    }
  ],
  "upstream": [
    "CVE-2026-74734"
  ]
}