CVE-2024-43911 (GCVE-0-2024-43911)

Vulnerability from cvelistv5 – Published: 2024-08-26 10:11 – Updated: 2025-11-03 22:07
VLAI?
Title
wifi: mac80211: fix NULL dereference at band check in starting tx ba session
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix NULL dereference at band check in starting tx ba session In MLD connection, link_data/link_conf are dynamically allocated. They don't point to vif->bss_conf. So, there will be no chanreq assigned to vif->bss_conf and then the chan will be NULL. Tweak the code to check ht_supported/vht_supported/has_he/has_eht on sta deflink. Crash log (with rtw89 version under MLO development): [ 9890.526087] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 9890.526102] #PF: supervisor read access in kernel mode [ 9890.526105] #PF: error_code(0x0000) - not-present page [ 9890.526109] PGD 0 P4D 0 [ 9890.526114] Oops: 0000 [#1] PREEMPT SMP PTI [ 9890.526119] CPU: 2 PID: 6367 Comm: kworker/u16:2 Kdump: loaded Tainted: G OE 6.9.0 #1 [ 9890.526123] Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB3WW (2.73 ) 11/28/2018 [ 9890.526126] Workqueue: phy2 rtw89_core_ba_work [rtw89_core] [ 9890.526203] RIP: 0010:ieee80211_start_tx_ba_session (net/mac80211/agg-tx.c:618 (discriminator 1)) mac80211 [ 9890.526279] Code: f7 e8 d5 93 3e ea 48 83 c4 28 89 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 49 8b 84 24 e0 f1 ff ff 48 8b 80 90 1b 00 00 <83> 38 03 0f 84 37 fe ff ff bb ea ff ff ff eb cc 49 8b 84 24 10 f3 All code ======== 0: f7 e8 imul %eax 2: d5 (bad) 3: 93 xchg %eax,%ebx 4: 3e ea ds (bad) 6: 48 83 c4 28 add $0x28,%rsp a: 89 d8 mov %ebx,%eax c: 5b pop %rbx d: 41 5c pop %r12 f: 41 5d pop %r13 11: 41 5e pop %r14 13: 41 5f pop %r15 15: 5d pop %rbp 16: c3 retq 17: cc int3 18: cc int3 19: cc int3 1a: cc int3 1b: 49 8b 84 24 e0 f1 ff mov -0xe20(%r12),%rax 22: ff 23: 48 8b 80 90 1b 00 00 mov 0x1b90(%rax),%rax 2a:* 83 38 03 cmpl $0x3,(%rax) <-- trapping instruction 2d: 0f 84 37 fe ff ff je 0xfffffffffffffe6a 33: bb ea ff ff ff mov $0xffffffea,%ebx 38: eb cc jmp 0x6 3a: 49 rex.WB 3b: 8b .byte 0x8b 3c: 84 24 10 test %ah,(%rax,%rdx,1) 3f: f3 repz Code starting with the faulting instruction =========================================== 0: 83 38 03 cmpl $0x3,(%rax) 3: 0f 84 37 fe ff ff je 0xfffffffffffffe40 9: bb ea ff ff ff mov $0xffffffea,%ebx e: eb cc jmp 0xffffffffffffffdc 10: 49 rex.WB 11: 8b .byte 0x8b 12: 84 24 10 test %ah,(%rax,%rdx,1) 15: f3 repz [ 9890.526285] RSP: 0018:ffffb8db09013d68 EFLAGS: 00010246 [ 9890.526291] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9308e0d656c8 [ 9890.526295] RDX: 0000000000000000 RSI: ffffffffab99460b RDI: ffffffffab9a7685 [ 9890.526300] RBP: ffffb8db09013db8 R08: 0000000000000000 R09: 0000000000000873 [ 9890.526304] R10: ffff9308e0d64800 R11: 0000000000000002 R12: ffff9308e5ff6e70 [ 9890.526308] R13: ffff930952500e20 R14: ffff9309192a8c00 R15: 0000000000000000 [ 9890.526313] FS: 0000000000000000(0000) GS:ffff930b4e700000(0000) knlGS:0000000000000000 [ 9890.526316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9890.526318] CR2: 0000000000000000 CR3: 0000000391c58005 CR4: 00000000001706f0 [ 9890.526321] Call Trace: [ 9890.526324] <TASK> [ 9890.526327] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 9890.526335] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) [ 9890.526340] ? page_fault_oops (arch/x86/mm/fault.c:713) [ 9890.526347] ? search_module_extables (kernel/module/main.c:3256 (discriminator ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6092077ad09ce880c61735c314060f0bd79ae4aa , < a5594c1e03b0df3908b1e1202a1ba34422eed0f6 (git)
Affected: 6092077ad09ce880c61735c314060f0bd79ae4aa , < 021d53a3d87eeb9dbba524ac515651242a2a7e3b (git)
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    Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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                "id": "CVE-2024-43911",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix NULL dereference at band check in starting tx ba session\n\nIn MLD connection, link_data/link_conf are dynamically allocated. They\ndon\u0027t point to vif-\u003ebss_conf. So, there will be no chanreq assigned to\nvif-\u003ebss_conf and then the chan will be NULL. Tweak the code to check\nht_supported/vht_supported/has_he/has_eht on sta deflink.\n\nCrash log (with rtw89 version under MLO development):\n[ 9890.526087] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[ 9890.526102] #PF: supervisor read access in kernel mode\n[ 9890.526105] #PF: error_code(0x0000) - not-present page\n[ 9890.526109] PGD 0 P4D 0\n[ 9890.526114] Oops: 0000 [#1] PREEMPT SMP PTI\n[ 9890.526119] CPU: 2 PID: 6367 Comm: kworker/u16:2 Kdump: loaded Tainted: G           OE      6.9.0 #1\n[ 9890.526123] Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB3WW (2.73 ) 11/28/2018\n[ 9890.526126] Workqueue: phy2 rtw89_core_ba_work [rtw89_core]\n[ 9890.526203] RIP: 0010:ieee80211_start_tx_ba_session (net/mac80211/agg-tx.c:618 (discriminator 1)) mac80211\n[ 9890.526279] Code: f7 e8 d5 93 3e ea 48 83 c4 28 89 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 49 8b 84 24 e0 f1 ff ff 48 8b 80 90 1b 00 00 \u003c83\u003e 38 03 0f 84 37 fe ff ff bb ea ff ff ff eb cc 49 8b 84 24 10 f3\nAll code\n========\n   0:\tf7 e8                \timul   %eax\n   2:\td5                   \t(bad)\n   3:\t93                   \txchg   %eax,%ebx\n   4:\t3e ea                \tds (bad)\n   6:\t48 83 c4 28          \tadd    $0x28,%rsp\n   a:\t89 d8                \tmov    %ebx,%eax\n   c:\t5b                   \tpop    %rbx\n   d:\t41 5c                \tpop    %r12\n   f:\t41 5d                \tpop    %r13\n  11:\t41 5e                \tpop    %r14\n  13:\t41 5f                \tpop    %r15\n  15:\t5d                   \tpop    %rbp\n  16:\tc3                   \tretq\n  17:\tcc                   \tint3\n  18:\tcc                   \tint3\n  19:\tcc                   \tint3\n  1a:\tcc                   \tint3\n  1b:\t49 8b 84 24 e0 f1 ff \tmov    -0xe20(%r12),%rax\n  22:\tff\n  23:\t48 8b 80 90 1b 00 00 \tmov    0x1b90(%rax),%rax\n  2a:*\t83 38 03             \tcmpl   $0x3,(%rax)\t\t\u003c-- trapping instruction\n  2d:\t0f 84 37 fe ff ff    \tje     0xfffffffffffffe6a\n  33:\tbb ea ff ff ff       \tmov    $0xffffffea,%ebx\n  38:\teb cc                \tjmp    0x6\n  3a:\t49                   \trex.WB\n  3b:\t8b                   \t.byte 0x8b\n  3c:\t84 24 10             \ttest   %ah,(%rax,%rdx,1)\n  3f:\tf3                   \trepz\n\nCode starting with the faulting instruction\n===========================================\n   0:\t83 38 03             \tcmpl   $0x3,(%rax)\n   3:\t0f 84 37 fe ff ff    \tje     0xfffffffffffffe40\n   9:\tbb ea ff ff ff       \tmov    $0xffffffea,%ebx\n   e:\teb cc                \tjmp    0xffffffffffffffdc\n  10:\t49                   \trex.WB\n  11:\t8b                   \t.byte 0x8b\n  12:\t84 24 10             \ttest   %ah,(%rax,%rdx,1)\n  15:\tf3                   \trepz\n[ 9890.526285] RSP: 0018:ffffb8db09013d68 EFLAGS: 00010246\n[ 9890.526291] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9308e0d656c8\n[ 9890.526295] RDX: 0000000000000000 RSI: ffffffffab99460b RDI: ffffffffab9a7685\n[ 9890.526300] RBP: ffffb8db09013db8 R08: 0000000000000000 R09: 0000000000000873\n[ 9890.526304] R10: ffff9308e0d64800 R11: 0000000000000002 R12: ffff9308e5ff6e70\n[ 9890.526308] R13: ffff930952500e20 R14: ffff9309192a8c00 R15: 0000000000000000\n[ 9890.526313] FS:  0000000000000000(0000) GS:ffff930b4e700000(0000) knlGS:0000000000000000\n[ 9890.526316] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 9890.526318] CR2: 0000000000000000 CR3: 0000000391c58005 CR4: 00000000001706f0\n[ 9890.526321] Call Trace:\n[ 9890.526324]  \u003cTASK\u003e\n[ 9890.526327] ? show_regs (arch/x86/kernel/dumpstack.c:479)\n[ 9890.526335] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434)\n[ 9890.526340] ? page_fault_oops (arch/x86/mm/fault.c:713)\n[ 9890.526347] ? search_module_extables (kernel/module/main.c:3256 (discriminator\n---truncated---"
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        {
          "url": "https://git.kernel.org/stable/c/021d53a3d87eeb9dbba524ac515651242a2a7e3b"
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      ],
      "title": "wifi: mac80211: fix NULL dereference at band check in starting tx ba session",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-43911",
    "datePublished": "2024-08-26T10:11:15.545Z",
    "dateReserved": "2024-08-17T09:11:59.295Z",
    "dateUpdated": "2025-11-03T22:07:16.250Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:07:16.250Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-43911\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:28:15.382346Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:12.376Z\"}}], \"cna\": {\"title\": \"wifi: mac80211: fix NULL dereference at band check in starting tx ba session\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6092077ad09ce880c61735c314060f0bd79ae4aa\", \"lessThan\": \"a5594c1e03b0df3908b1e1202a1ba34422eed0f6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6092077ad09ce880c61735c314060f0bd79ae4aa\", \"lessThan\": \"021d53a3d87eeb9dbba524ac515651242a2a7e3b\", \"versionType\": \"git\"}], \"programFiles\": [\"net/mac80211/agg-tx.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.10.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/mac80211/agg-tx.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a5594c1e03b0df3908b1e1202a1ba34422eed0f6\"}, {\"url\": \"https://git.kernel.org/stable/c/021d53a3d87eeb9dbba524ac515651242a2a7e3b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mac80211: fix NULL dereference at band check in starting tx ba session\\n\\nIn MLD connection, link_data/link_conf are dynamically allocated. They\\ndon\u0027t point to vif-\u003ebss_conf. So, there will be no chanreq assigned to\\nvif-\u003ebss_conf and then the chan will be NULL. Tweak the code to check\\nht_supported/vht_supported/has_he/has_eht on sta deflink.\\n\\nCrash log (with rtw89 version under MLO development):\\n[ 9890.526087] BUG: kernel NULL pointer dereference, address: 0000000000000000\\n[ 9890.526102] #PF: supervisor read access in kernel mode\\n[ 9890.526105] #PF: error_code(0x0000) - not-present page\\n[ 9890.526109] PGD 0 P4D 0\\n[ 9890.526114] Oops: 0000 [#1] PREEMPT SMP PTI\\n[ 9890.526119] CPU: 2 PID: 6367 Comm: kworker/u16:2 Kdump: loaded Tainted: G           OE      6.9.0 #1\\n[ 9890.526123] Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB3WW (2.73 ) 11/28/2018\\n[ 9890.526126] Workqueue: phy2 rtw89_core_ba_work [rtw89_core]\\n[ 9890.526203] RIP: 0010:ieee80211_start_tx_ba_session (net/mac80211/agg-tx.c:618 (discriminator 1)) mac80211\\n[ 9890.526279] Code: f7 e8 d5 93 3e ea 48 83 c4 28 89 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 49 8b 84 24 e0 f1 ff ff 48 8b 80 90 1b 00 00 \u003c83\u003e 38 03 0f 84 37 fe ff ff bb ea ff ff ff eb cc 49 8b 84 24 10 f3\\nAll code\\n========\\n   0:\\tf7 e8                \\timul   %eax\\n   2:\\td5                   \\t(bad)\\n   3:\\t93                   \\txchg   %eax,%ebx\\n   4:\\t3e ea                \\tds (bad)\\n   6:\\t48 83 c4 28          \\tadd    $0x28,%rsp\\n   a:\\t89 d8                \\tmov    %ebx,%eax\\n   c:\\t5b                   \\tpop    %rbx\\n   d:\\t41 5c                \\tpop    %r12\\n   f:\\t41 5d                \\tpop    %r13\\n  11:\\t41 5e                \\tpop    %r14\\n  13:\\t41 5f                \\tpop    %r15\\n  15:\\t5d                   \\tpop    %rbp\\n  16:\\tc3                   \\tretq\\n  17:\\tcc                   \\tint3\\n  18:\\tcc                   \\tint3\\n  19:\\tcc                   \\tint3\\n  1a:\\tcc                   \\tint3\\n  1b:\\t49 8b 84 24 e0 f1 ff \\tmov    -0xe20(%r12),%rax\\n  22:\\tff\\n  23:\\t48 8b 80 90 1b 00 00 \\tmov    0x1b90(%rax),%rax\\n  2a:*\\t83 38 03             \\tcmpl   $0x3,(%rax)\\t\\t\u003c-- trapping instruction\\n  2d:\\t0f 84 37 fe ff ff    \\tje     0xfffffffffffffe6a\\n  33:\\tbb ea ff ff ff       \\tmov    $0xffffffea,%ebx\\n  38:\\teb cc                \\tjmp    0x6\\n  3a:\\t49                   \\trex.WB\\n  3b:\\t8b                   \\t.byte 0x8b\\n  3c:\\t84 24 10             \\ttest   %ah,(%rax,%rdx,1)\\n  3f:\\tf3                   \\trepz\\n\\nCode starting with the faulting instruction\\n===========================================\\n   0:\\t83 38 03             \\tcmpl   $0x3,(%rax)\\n   3:\\t0f 84 37 fe ff ff    \\tje     0xfffffffffffffe40\\n   9:\\tbb ea ff ff ff       \\tmov    $0xffffffea,%ebx\\n   e:\\teb cc                \\tjmp    0xffffffffffffffdc\\n  10:\\t49                   \\trex.WB\\n  11:\\t8b                   \\t.byte 0x8b\\n  12:\\t84 24 10             \\ttest   %ah,(%rax,%rdx,1)\\n  15:\\tf3                   \\trepz\\n[ 9890.526285] RSP: 0018:ffffb8db09013d68 EFLAGS: 00010246\\n[ 9890.526291] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9308e0d656c8\\n[ 9890.526295] RDX: 0000000000000000 RSI: ffffffffab99460b RDI: ffffffffab9a7685\\n[ 9890.526300] RBP: ffffb8db09013db8 R08: 0000000000000000 R09: 0000000000000873\\n[ 9890.526304] R10: ffff9308e0d64800 R11: 0000000000000002 R12: ffff9308e5ff6e70\\n[ 9890.526308] R13: ffff930952500e20 R14: ffff9309192a8c00 R15: 0000000000000000\\n[ 9890.526313] FS:  0000000000000000(0000) GS:ffff930b4e700000(0000) knlGS:0000000000000000\\n[ 9890.526316] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 9890.526318] CR2: 0000000000000000 CR3: 0000000391c58005 CR4: 00000000001706f0\\n[ 9890.526321] Call Trace:\\n[ 9890.526324]  \u003cTASK\u003e\\n[ 9890.526327] ? show_regs (arch/x86/kernel/dumpstack.c:479)\\n[ 9890.526335] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434)\\n[ 9890.526340] ? page_fault_oops (arch/x86/mm/fault.c:713)\\n[ 9890.526347] ? search_module_extables (kernel/module/main.c:3256 (discriminator\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.5\", \"versionStartIncluding\": \"6.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"6.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-06-19T12:48:49.939Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-43911\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:07:16.250Z\", \"dateReserved\": \"2024-08-17T09:11:59.295Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-26T10:11:15.545Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
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}


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Author Source Type Date

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.