{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  iommu: Fix dev_iommu memory leak when device_add fails in iommu_mock_device_add  iommu_mock_device_add() first calls iommu_fwspec_init(), which on success allocates both dev-\u003eiommu (via dev_iommu_get()) and dev-\u003eiommu-\u003efwspec. If the subsequent device_add(dev) call fails, the error path only calls iommu_fwspec_free(dev), which frees fwspec but leaves dev-\u003eiommu still allocated.  This triggers the following kmemleak report when fuzzing with Syzkaller:  BUG: memory leak unreferenced object 0xffff888011e0a200 (size 192):   comm \"syz.1.1695\", pid 24885, jiffies 4295222527   hex dump (first 32 bytes):     00 00 00 00 00 00 00 00 00 00 00 00 ad 4e ad de  .............N..     ff ff ff ff 00 00 00 00 ff ff ff ff ff ff ff ff  ................   backtrace (crc 25df5bb3):     kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]     slab_post_alloc_hook mm/slub.c:4575 [inline]     slab_alloc_node mm/slub.c:4899 [inline]     __kmalloc_cache_noprof+0x47a/0x710 mm/slub.c:5415     kmalloc_noprof include/linux/slab.h:950 [inline]     kzalloc_noprof include/linux/slab.h:1188 [inline]     dev_iommu_get+0x10c/0x1a0 drivers/iommu/iommu.c:408     iommu_fwspec_init+0x288/0x4d0 drivers/iommu/iommu.c:3087     iommu_mock_device_add+0x46/0xb0 drivers/iommu/iommu.c:385     mock_dev_create drivers/iommu/iommufd/selftest.c:1025 [inline]     iommufd_test_mock_domain drivers/iommu/iommufd/selftest.c:1066 [inline]     iommufd_test+0x2f8a/0x6190 drivers/iommu/iommufd/selftest.c:2072     iommufd_fops_ioctl+0x367/0x540 drivers/iommu/iommufd/main.c:533     vfs_ioctl fs/ioctl.c:51 [inline]     __do_sys_ioctl fs/ioctl.c:597 [inline]     __se_sys_ioctl fs/ioctl.c:583 [inline]     __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]     do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94     entry_SYSCALL_64_after_hwframe+0x77/0x7f  Fix this by calling dev_iommu_free(dev) instead of iommu_fwspec_free(dev) in the device_add() failure path. dev_iommu_free() frees both fwspec and the outer dev_iommu struct and clears dev-\u003eiommu.",
  "id": "DEBIAN-CVE-2026-89449",
  "modified": "2026-09-12T08:47:19.834910797Z",
  "published": "2026-09-11T20:19:25.473Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89449"
    }
  ],
  "upstream": [
    "CVE-2026-89449"
  ]
}