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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix double free on tx path.\n\nWe see kernel crashes and lockups and KASAN errors related to ax210\nfirmware crashes.  One of the KASAN dumps pointed at the tx path,\nand it appears there is indeed a way to double-free an skb.\n\nIf iwl_mvm_tx_skb_sta returns non-zero, then the \u0027skb\u0027 sent into the\nmethod will be freed.  But, in case where we build TSO skb buffer,\nthe skb may also be freed in error case.  So, return 0 in that particular\nerror case and do cleanup manually.\n\nBUG: KASAN: use-after-free in __list_del_entry_valid+0x12/0x90\niwlwifi 0000:06:00.0: 0x00000000 | tsf hi\nRead of size 8 at addr ffff88813cfa4ba0 by task btserver/9650\n\nCPU: 4 PID: 9650 Comm: btserver Tainted: G        W         5.19.8+ #5\niwlwifi 0000:06:00.0: 0x00000000 | time gp1\nHardware name: Default string Default string/SKYBAY, BIOS 5.12 02/19/2019\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x55/0x6d\n print_report.cold.12+0xf2/0x684\niwlwifi 0000:06:00.0: 0x1D0915A8 | time gp2\n ? __list_del_entry_valid+0x12/0x90\n kasan_report+0x8b/0x180\niwlwifi 0000:06:00.0: 0x00000001 | uCode revision type\n ? __list_del_entry_valid+0x12/0x90\n __list_del_entry_valid+0x12/0x90\niwlwifi 0000:06:00.0: 0x00000048 | uCode version major\n tcp_update_skb_after_send+0x5d/0x170\n __tcp_transmit_skb+0xb61/0x15c0\niwlwifi 0000:06:00.0: 0xDAA05125 | uCode version minor\n ? __tcp_select_window+0x490/0x490\niwlwifi 0000:06:00.0: 0x00000420 | hw version\n ? trace_kmalloc_node+0x29/0xd0\n ? __kmalloc_node_track_caller+0x12a/0x260\n ? memset+0x1f/0x40\n ? __build_skb_around+0x125/0x150\n ? __alloc_skb+0x1d4/0x220\n ? skb_zerocopy_clone+0x55/0x230\niwlwifi 0000:06:00.0: 0x00489002 | board version\n ? kmalloc_reserve+0x80/0x80\n ? rcu_read_lock_bh_held+0x60/0xb0\n tcp_write_xmit+0x3f1/0x24d0\niwlwifi 0000:06:00.0: 0x034E001C | hcmd\n ? __check_object_size+0x180/0x350\niwlwifi 0000:06:00.0: 0x24020000 | isr0\n tcp_sendmsg_locked+0x8a9/0x1520\niwlwifi 0000:06:00.0: 0x01400000 | isr1\n ? tcp_sendpage+0x50/0x50\niwlwifi 0000:06:00.0: 0x48F0000A | isr2\n ? lock_release+0xb9/0x400\n ? tcp_sendmsg+0x14/0x40\niwlwifi 0000:06:00.0: 0x00C3080C | isr3\n ? lock_downgrade+0x390/0x390\n ? do_raw_spin_lock+0x114/0x1d0\niwlwifi 0000:06:00.0: 0x00200000 | isr4\n ? rwlock_bug.part.2+0x50/0x50\niwlwifi 0000:06:00.0: 0x034A001C | last cmd Id\n ? rwlock_bug.part.2+0x50/0x50\n ? lockdep_hardirqs_on_prepare+0xe/0x200\niwlwifi 0000:06:00.0: 0x0000C2F0 | wait_event\n ? __local_bh_enable_ip+0x87/0xe0\n ? inet_send_prepare+0x220/0x220\niwlwifi 0000:06:00.0: 0x000000C4 | l2p_control\n tcp_sendmsg+0x22/0x40\n sock_sendmsg+0x5f/0x70\niwlwifi 0000:06:00.0: 0x00010034 | l2p_duration\n __sys_sendto+0x19d/0x250\niwlwifi 0000:06:00.0: 0x00000007 | l2p_mhvalid\n ? __ia32_sys_getpeername+0x40/0x40\niwlwifi 0000:06:00.0: 0x00000000 | l2p_addr_match\n ? rcu_read_lock_held_common+0x12/0x50\n ? rcu_read_lock_sched_held+0x5a/0xd0\n ? rcu_read_lock_bh_held+0xb0/0xb0\n ? rcu_read_lock_sched_held+0x5a/0xd0\n ? rcu_read_lock_sched_held+0x5a/0xd0\n ? lock_release+0xb9/0x400\n ? lock_downgrade+0x390/0x390\n ? ktime_get+0x64/0x130\n ? ktime_get+0x8d/0x130\n ? rcu_read_lock_held_common+0x12/0x50\n ? rcu_read_lock_sched_held+0x5a/0xd0\n ? rcu_read_lock_held_common+0x12/0x50\n ? rcu_read_lock_sched_held+0x5a/0xd0\n ? rcu_read_lock_bh_held+0xb0/0xb0\n ? rcu_read_lock_bh_held+0xb0/0xb0\n __x64_sys_sendto+0x6f/0x80\n do_syscall_64+0x34/0xb0\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f1d126e4531\nCode: 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 35 80 0c 00 41 89 ca 8b 00 85 c0 75 1c 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 67 c3 66 0f 1f 44 00 00 55 48 83 ec 20 48 89\nRSP: 002b:00007ffe21a679d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\nRAX: ffffffffffffffda RBX: 000000000000ffdc RCX: 00007f1d126e4531\nRDX: 0000000000010000 RSI: 000000000374acf0 RDI: 0000000000000014\nRBP: 00007ffe21a67ac0 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code runs on the local WiFi TX path and is reached via sendto/tcp_sendmsg through mac80211 into iwl_mvm_tx_skb_sta, not by processing received WiFi frames. A local process sending large GSO TCP traffic over an Intel iwlwifi interface is sufficient.\nAC:L - An attacker can reliably create GSO/TSO skbs by sending large TCP payloads over WiFi (TSO is advertised by default on affected devices), and iwl_mvm_tx_mpdu failure after segmentation is reachable via attacker-influenced conditions such as GFP_ATOMIC tx-cmd allocation failure under memory pressure or STATUS_FW_ERROR; no uncontrolled race is required.\nPR:L - Any unprivileged local user can trigger the path with a normal TCP sendto on the WiFi interface, as shown in the KASAN stack; no root or special capabilities are required.\nUI:N - The attacker triggers the bug by sending their own traffic; no separate victim action is required.\nS:U - This is kernel heap memory corruption within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a double-free/UAF of an skbuff_fclone_cache object, which per CVSS kernel guidance enables heap reuse and arbitrary read primitives.\nI:H - Double-free of an skb enables heap spraying and corruption suitable for arbitrary write or control-flow hijacking, so integrity impact is High.\nA:H - The double-free produces kernel UAF crashes, oopses, and lockups as reported (KASAN use-after-free and observed crashes), so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:57:55.856Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0e1e311fd929c6a8dcfddcb4748c47b07e39821f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ae966649f665bc3868b935157dd4a3c31810dcc0"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8e32f1bf1a9183a6aad560c6688500222d24299"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fabe41fba907e4fd826acbbdb42e09c681c515e"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a2ecd1ec14075117ccb3e85f0fed224578ec228"
        },
        {
          "url": "https://git.kernel.org/stable/c/0473cbae2137b963bd0eaa74336131cb1d3bc6c3"
        }
      ],
      "title": "wifi: iwlwifi: mvm: fix double free on tx path.",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50248",
    "datePublished": "2025-09-15T14:02:07.723Z",
    "dateReserved": "2025-09-15T13:58:00.972Z",
    "dateUpdated": "2026-08-05T08:57:55.856Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}