cve/published/2024/CVE-2024-56668.json

{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Fix qi_batch NULL pointer with nested parent domain\n\nThe qi_batch is allocated when assigning cache tag for a domain. While\nfor nested parent domain, it is missed. Hence, when trying to map pages\nto the nested parent, NULL dereference occurred. Also, there is potential\nmemleak since there is no lock around domain->qi_batch allocation.\n\nTo solve it, add a helper for qi_batch allocation, and call it in both\nthe __cache_tag_assign_domain() and __cache_tag_assign_parent_domain().\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000200\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 8104795067 P4D 0\n  Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 223 UID: 0 PID: 4357 Comm: qemu-system-x86 Not tainted 6.13.0-rc1-00028-g4b50c3c3b998-dirty #2632\n  Call Trace:\n   ? __die+0x24/0x70\n   ? page_fault_oops+0x80/0x150\n   ? do_user_addr_fault+0x63/0x7b0\n   ? exc_page_fault+0x7c/0x220\n   ? asm_exc_page_fault+0x26/0x30\n   ? cache_tag_flush_range_np+0x13c/0x260\n   intel_iommu_iotlb_sync_map+0x1a/0x30\n   iommu_map+0x61/0xf0\n   batch_to_domain+0x188/0x250\n   iopt_area_fill_domains+0x125/0x320\n   ? rcu_is_watching+0x11/0x50\n   iopt_map_pages+0x63/0x100\n   iopt_map_common.isra.0+0xa7/0x190\n   iopt_map_user_pages+0x6a/0x80\n   iommufd_ioas_map+0xcd/0x1d0\n   iommufd_fops_ioctl+0x118/0x1c0\n   __x64_sys_ioctl+0x93/0xc0\n   do_syscall_64+0x71/0x140\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/iommu/intel/cache.c"
               ],
               "versions": [
                  {
                     "version": "705c1cdf1e73c4c727bbfc8775434e6dd36e8baf",
                     "lessThan": "ffd774c34774fd4cc0e9cf2976595623a6c3a077",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "705c1cdf1e73c4c727bbfc8775434e6dd36e8baf",
                     "lessThan": "74536f91962d5f6af0a42414773ce61e653c10ee",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/iommu/intel/cache.c"
               ],
               "versions": [
                  {
                     "version": "6.12",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.12",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.12.6",
                     "lessThanOrEqual": "6.12.*",
                     "status": "unaffected",
                     "versionType": "semver"
                  },
                  {
                     "version": "6.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "cpeApplicability": [
            {
               "nodes": [
                  {
                     "operator": "OR",
                     "negate": false,
                     "cpeMatch": [
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "6.12",
                           "versionEndExcluding": "6.12.6"
                        },
                        {
                           "vulnerable": true,
                           "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                           "versionStartIncluding": "6.12",
                           "versionEndExcluding": "6.13"
                        }
                     ]
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/ffd774c34774fd4cc0e9cf2976595623a6c3a077"
            },
            {
               "url": "https://git.kernel.org/stable/c/74536f91962d5f6af0a42414773ce61e653c10ee"
            }
         ],
         "title": "iommu/vt-d: Fix qi_batch NULL pointer with nested parent domain",
         "x_generator": {
            "engine": "bippy-1.2.0"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-56668",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}