GHSA-62RX-986C-7PG7

Vulnerability from github – Published: 2024-08-26 12:31 – Updated: 2025-11-04 00:31
VLAI?
Details

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] [ 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 ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-43911"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-26T11:15:05Z",
    "severity": "MODERATE"
  },
  "details": "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---",
  "id": "GHSA-62rx-986c-7pg7",
  "modified": "2025-11-04T00:31:18Z",
  "published": "2024-08-26T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43911"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/021d53a3d87eeb9dbba524ac515651242a2a7e3b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0acaf4a5025d6dafb7da787d2d4c47ed95e46ed6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a53c2d847627b790fb3bd8b00e02c247941b17e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a5594c1e03b0df3908b1e1202a1ba34422eed0f6"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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