CVE-2022-50248 (GCVE-0-2022-50248)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:02 – Updated: 2025-09-15 14:02
VLAI?
Title
wifi: iwlwifi: mvm: fix double free on tx path.
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: fix double free on tx path. We see kernel crashes and lockups and KASAN errors related to ax210 firmware crashes. One of the KASAN dumps pointed at the tx path, and it appears there is indeed a way to double-free an skb. If iwl_mvm_tx_skb_sta returns non-zero, then the 'skb' sent into the method will be freed. But, in case where we build TSO skb buffer, the skb may also be freed in error case. So, return 0 in that particular error case and do cleanup manually. BUG: KASAN: use-after-free in __list_del_entry_valid+0x12/0x90 iwlwifi 0000:06:00.0: 0x00000000 | tsf hi Read of size 8 at addr ffff88813cfa4ba0 by task btserver/9650 CPU: 4 PID: 9650 Comm: btserver Tainted: G W 5.19.8+ #5 iwlwifi 0000:06:00.0: 0x00000000 | time gp1 Hardware name: Default string Default string/SKYBAY, BIOS 5.12 02/19/2019 Call Trace: <TASK> dump_stack_lvl+0x55/0x6d print_report.cold.12+0xf2/0x684 iwlwifi 0000:06:00.0: 0x1D0915A8 | time gp2 ? __list_del_entry_valid+0x12/0x90 kasan_report+0x8b/0x180 iwlwifi 0000:06:00.0: 0x00000001 | uCode revision type ? __list_del_entry_valid+0x12/0x90 __list_del_entry_valid+0x12/0x90 iwlwifi 0000:06:00.0: 0x00000048 | uCode version major tcp_update_skb_after_send+0x5d/0x170 __tcp_transmit_skb+0xb61/0x15c0 iwlwifi 0000:06:00.0: 0xDAA05125 | uCode version minor ? __tcp_select_window+0x490/0x490 iwlwifi 0000:06:00.0: 0x00000420 | hw version ? trace_kmalloc_node+0x29/0xd0 ? __kmalloc_node_track_caller+0x12a/0x260 ? memset+0x1f/0x40 ? __build_skb_around+0x125/0x150 ? __alloc_skb+0x1d4/0x220 ? skb_zerocopy_clone+0x55/0x230 iwlwifi 0000:06:00.0: 0x00489002 | board version ? kmalloc_reserve+0x80/0x80 ? rcu_read_lock_bh_held+0x60/0xb0 tcp_write_xmit+0x3f1/0x24d0 iwlwifi 0000:06:00.0: 0x034E001C | hcmd ? __check_object_size+0x180/0x350 iwlwifi 0000:06:00.0: 0x24020000 | isr0 tcp_sendmsg_locked+0x8a9/0x1520 iwlwifi 0000:06:00.0: 0x01400000 | isr1 ? tcp_sendpage+0x50/0x50 iwlwifi 0000:06:00.0: 0x48F0000A | isr2 ? lock_release+0xb9/0x400 ? tcp_sendmsg+0x14/0x40 iwlwifi 0000:06:00.0: 0x00C3080C | isr3 ? lock_downgrade+0x390/0x390 ? do_raw_spin_lock+0x114/0x1d0 iwlwifi 0000:06:00.0: 0x00200000 | isr4 ? rwlock_bug.part.2+0x50/0x50 iwlwifi 0000:06:00.0: 0x034A001C | last cmd Id ? rwlock_bug.part.2+0x50/0x50 ? lockdep_hardirqs_on_prepare+0xe/0x200 iwlwifi 0000:06:00.0: 0x0000C2F0 | wait_event ? __local_bh_enable_ip+0x87/0xe0 ? inet_send_prepare+0x220/0x220 iwlwifi 0000:06:00.0: 0x000000C4 | l2p_control tcp_sendmsg+0x22/0x40 sock_sendmsg+0x5f/0x70 iwlwifi 0000:06:00.0: 0x00010034 | l2p_duration __sys_sendto+0x19d/0x250 iwlwifi 0000:06:00.0: 0x00000007 | l2p_mhvalid ? __ia32_sys_getpeername+0x40/0x40 iwlwifi 0000:06:00.0: 0x00000000 | l2p_addr_match ? rcu_read_lock_held_common+0x12/0x50 ? rcu_read_lock_sched_held+0x5a/0xd0 ? rcu_read_lock_bh_held+0xb0/0xb0 ? rcu_read_lock_sched_held+0x5a/0xd0 ? rcu_read_lock_sched_held+0x5a/0xd0 ? lock_release+0xb9/0x400 ? lock_downgrade+0x390/0x390 ? ktime_get+0x64/0x130 ? ktime_get+0x8d/0x130 ? rcu_read_lock_held_common+0x12/0x50 ? rcu_read_lock_sched_held+0x5a/0xd0 ? rcu_read_lock_held_common+0x12/0x50 ? rcu_read_lock_sched_held+0x5a/0xd0 ? rcu_read_lock_bh_held+0xb0/0xb0 ? rcu_read_lock_bh_held+0xb0/0xb0 __x64_sys_sendto+0x6f/0x80 do_syscall_64+0x34/0xb0 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f1d126e4531 Code: 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 <48> 3d 00 f0 ff ff 77 67 c3 66 0f 1f 44 00 00 55 48 83 ec 20 48 89 RSP: 002b:00007ffe21a679d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000000ffdc RCX: 00007f1d126e4531 RDX: 0000000000010000 RSI: 000000000374acf0 RDI: 0000000000000014 RBP: 00007ffe21a67ac0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < 0e1e311fd929c6a8dcfddcb4748c47b07e39821f (git)
Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < ae966649f665bc3868b935157dd4a3c31810dcc0 (git)
Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < d8e32f1bf1a9183a6aad560c6688500222d24299 (git)
Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < 8fabe41fba907e4fd826acbbdb42e09c681c515e (git)
Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < 3a2ecd1ec14075117ccb3e85f0fed224578ec228 (git)
Affected: 08f7d8b69aaf137db8ee0a2d7c9e6cd6383ae250 , < 0473cbae2137b963bd0eaa74336131cb1d3bc6c3 (git)
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    Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
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              "versionType": "git"
            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.1"
            },
            {
              "lessThan": "5.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.86",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:02:07.723Z",
        "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": "2025-09-15T14:02:07.723Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.