CVE-2024-56639

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

net: hsr: must allocate more bytes for RedBox support

Blamed commit forgot to change hsr_init_skb() to allocate larger skb for RedBox case.

Indeed, send_hsr_supervision_frame() will add two additional components (struct hsr_sup_tlv and struct hsr_sup_payload)

Detalles técnicos trazas, registros y código del informe original

syzbot reported the following crash:
skbuff: skb_over_panic: text:ffffffff8afd4b0a len:34 put:6 head:ffff88802ad29e00 data:ffff88802ad29f22 tail:0x144 end:0x140 dev:gretap0
------------[ cut here ]------------
 kernel BUG at net/core/skbuff.c:206 !
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 7611 Comm: syz-executor Not tainted 6.12.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
 RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:206
Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 a0 7d 9b 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 9a 76 79 f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 94 76 fb f8 4c
RSP: 0018:ffffc90000858ab8 EFLAGS: 00010282
RAX: 0000000000000087 RBX: ffff8880598c08c0 RCX: ffffffff816d3e69
RDX: 0000000000000000 RSI: ffffffff816de786 RDI: 0000000000000005
RBP: ffffffff8c9b91c0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000302 R11: ffffffff961cc1d0 R12: ffffffff8afd4b0a
R13: 0000000000000006 R14: ffff88804b938130 R15: 0000000000000140
FS:  000055558a3d6500(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1295974ff8 CR3: 000000002ab6e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
  skb_over_panic net/core/skbuff.c:211 [inline]
  skb_put+0x174/0x1b0 net/core/skbuff.c:2617
  send_hsr_supervision_frame+0x6fa/0x9e0 net/hsr/hsr_device.c:342
  hsr_proxy_announce+0x1a3/0x4a0 net/hsr/hsr_device.c:436
  call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794
  expire_timers kernel/time/timer.c:1845 [inline]
  __run_timers+0x6e8/0x930 kernel/time/timer.c:2419
  __run_timer_base kernel/time/timer.c:2430 [inline]
  __run_timer_base kernel/time/timer.c:2423 [inline]
  run_timer_base+0x111/0x190 kernel/time/timer.c:2439
  run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
  handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
  __do_softirq kernel/softirq.c:588 [inline]
  invoke_softirq kernel/softirq.c:428 [inline]
  __irq_exit_rcu kernel/softirq.c:637 [inline]
  irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
  sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.21%
Percentil entre todas las CVEs puntuadas: 11
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2024-56639",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "cb3a332662b7fbe9f20849473c1b2c59e7d5d617",
              "lessThan": "e6773b7da5ecb11ef8e95b50145fd963e326e0f1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d90e4f72e8d464577dac67a18e69eb4a26abd63b",
              "lessThan": "a77a45fbadd9c053e8cf3a9ce2e23bcd23819ea6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5055cccfc2d1cc1a7306f6bcdcd0ee9521d707f5",
              "lessThan": "688842f47ee9fb392d1c3a1ced1d21d505b14968",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5055cccfc2d1cc1a7306f6bcdcd0ee9521d707f5",
              "lessThan": "af8edaeddbc52e53207d859c912b017fd9a77629",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/hsr/hsr_device.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/hsr/hsr_device.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2024-12-27T15:15:23.633",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/688842f47ee9fb392d1c3a1ced1d21d505b14968",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a77a45fbadd9c053e8cf3a9ce2e23bcd23819ea6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af8edaeddbc52e53207d859c912b017fd9a77629",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6773b7da5ecb11ef8e95b50145fd963e326e0f1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: must allocate more bytes for RedBox support\n\nBlamed commit forgot to change hsr_init_skb() to allocate\nlarger skb for RedBox case.\n\nIndeed, send_hsr_supervision_frame() will add\ntwo additional components (struct hsr_sup_tlv\nand struct hsr_sup_payload)\n\nsyzbot reported the following crash:\nskbuff: skb_over_panic: text:ffffffff8afd4b0a len:34 put:6 head:ffff88802ad29e00 data:ffff88802ad29f22 tail:0x144 end:0x140 dev:gretap0\n------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:206 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 2 UID: 0 PID: 7611 Comm: syz-executor Not tainted 6.12.0-syzkaller #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:206\nCode: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 a0 7d 9b 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 9a 76 79 f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 94 76 fb f8 4c\nRSP: 0018:ffffc90000858ab8 EFLAGS: 00010282\nRAX: 0000000000000087 RBX: ffff8880598c08c0 RCX: ffffffff816d3e69\nRDX: 0000000000000000 RSI: ffffffff816de786 RDI: 0000000000000005\nRBP: ffffffff8c9b91c0 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000302 R11: ffffffff961cc1d0 R12: ffffffff8afd4b0a\nR13: 0000000000000006 R14: ffff88804b938130 R15: 0000000000000140\nFS:  000055558a3d6500(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1295974ff8 CR3: 000000002ab6e000 CR4: 0000000000352ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <IRQ>\n  skb_over_panic net/core/skbuff.c:211 [inline]\n  skb_put+0x174/0x1b0 net/core/skbuff.c:2617\n  send_hsr_supervision_frame+0x6fa/0x9e0 net/hsr/hsr_device.c:342\n  hsr_proxy_announce+0x1a3/0x4a0 net/hsr/hsr_device.c:436\n  call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794\n  expire_timers kernel/time/timer.c:1845 [inline]\n  __run_timers+0x6e8/0x930 kernel/time/timer.c:2419\n  __run_timer_base kernel/time/timer.c:2430 [inline]\n  __run_timer_base kernel/time/timer.c:2423 [inline]\n  run_timer_base+0x111/0x190 kernel/time/timer.c:2439\n  run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449\n  handle_softirqs+0x213/0x8f0 kernel/softirq.c:554\n  __do_softirq kernel/softirq.c:588 [inline]\n  invoke_softirq kernel/softirq.c:428 [inline]\n  __irq_exit_rcu kernel/softirq.c:637 [inline]\n  irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649\n  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n  sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049\n </IRQ>"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: hsr: debe asignar más bytes para la compatibilidad con RedBox el commit culpada olvidó cambiar hsr_init_skb() para asignar skb más grande para el caso de RedBox. De hecho, send_hsr_supervision_frame() agregará dos componentes adicionales (struct hsr_sup_tlv y struct hsr_sup_payload) syzbot informó el siguiente fallo: skbuff: skb_over_panic: text:ffffffff8afd4b0a len:34 put:6 head:ffff88802ad29e00 data:ffff88802ad29f22 tail:0x144 end:0x140 dev:gretap0 ------------[ corte aquí ]------------ ¡ERROR del kernel en net/core/skbuff.c:206! Oops: código de operación no válido: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 2 UID: 0 PID: 7611 Comm: syz-executor No contaminado 6.12.0-syzkaller #0 Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 01/04/2014 RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:206 Código: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 a0 7d 9b 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 9a 76 79 f8 90 &lt;0f&gt; 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 94 76 fb f8 4c RSP: 0018:ffffc90000858ab8 EFLAGS: 00010282 RAX: 0000000000000087 RBX: ffff8880598c08c0 RCX: ffffffff816d3e69 RDX: 0000000000000000 RSI: ffffffff816de786 RDI: 0000000000000005 RBP: ffffffff8c9b91c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000302 R11: ffffffff961cc1d0 R12: ffffffff8afd4b0a R13: 000000000000006 R14: ffff88804b938130 R15: 0000000000000140 FS: 000055558a3d6500(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1295974ff8 CR3: 000000002ab6e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Rastreo de llamadas:  skb_over_panic net/core/skbuff.c:211 [en línea] skb_put+0x174/0x1b0 net/core/skbuff.c:2617 send_hsr_supervision_frame+0x6fa/0x9e0 net/hsr/hsr_device.c:342 hsr_proxy_announce+0x1a3/0x4a0 net/hsr/hsr_device.c:436 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [en línea] __run_timers+0x6e8/0x930 kernel/time/timer.c:2419 __run_timer_base kernel/time/timer.c:2430 [en línea] __run_timer_base kernel/time/timer.c:2423 [en línea] run_timer_base+0x111/0x190 kernel/time/timer.c:2439 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [en línea] anybody_softirq kernel/softirq.c:428 [en línea] __irq_exit_rcu kernel/softirq.c:637 [en línea] anyone_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [en línea] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 "
    }
  ],
  "lastModified": "2026-09-14T12:17:34.223",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DC342DCB-0FE7-49A9-8291-3E1FCB51A530",
              "versionEndExcluding": "6.12.5",
              "versionStartIncluding": "6.10"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}