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CVE-2024-50258

Estado: ModificadaMedia (5.5)—

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

net: fix crash when config small gso_max_size/gso_ipv4_max_size

Detalles técnicos trazas, registros y código del informe original
Config a small gso_max_size/gso_ipv4_max_size will lead to an underflow
in sk_dst_gso_max_size(), which may trigger a BUG_ON crash,
because sk->sk_gso_max_size would be much bigger than device limits.
Call Trace:
tcp_write_xmit
    tso_segs = tcp_init_tso_segs(skb, mss_now);
        tcp_set_skb_tso_segs
            tcp_skb_pcount_set
                // skb->len = 524288, mss_now = 8
                // u16 tso_segs = 524288/8 = 65535 -> 0
                tso_segs = DIV_ROUND_UP(skb->len, mss_now)
    BUG_ON(!tso_segs)
Add check for the minimum value of gso_max_size and gso_ipv4_max_size.

CVSS

Probabilidad de explotación (EPSS)

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

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-50258",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "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"
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        "exploitabilityScore": 1.8
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  "published": "2024-11-09T11:15:11.413",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-191"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix crash when config small gso_max_size/gso_ipv4_max_size\n\nConfig a small gso_max_size/gso_ipv4_max_size will lead to an underflow\nin sk_dst_gso_max_size(), which may trigger a BUG_ON crash,\nbecause sk->sk_gso_max_size would be much bigger than device limits.\nCall Trace:\ntcp_write_xmit\n    tso_segs = tcp_init_tso_segs(skb, mss_now);\n        tcp_set_skb_tso_segs\n            tcp_skb_pcount_set\n                // skb->len = 524288, mss_now = 8\n                // u16 tso_segs = 524288/8 = 65535 -> 0\n                tso_segs = DIV_ROUND_UP(skb->len, mss_now)\n    BUG_ON(!tso_segs)\nAdd check for the minimum value of gso_max_size and gso_ipv4_max_size."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: se corrige el fallo al configurar un gso_max_size/gso_ipv4_max_size pequeño. Configurar un gso_max_size/gso_ipv4_max_size pequeño provocará un desbordamiento en sk_dst_gso_max_size(), lo que puede desencadenar un fallo BUG_ON, porque sk->sk_gso_max_size sería mucho mayor que los límites del dispositivo. Seguimiento de llamadas: tcp_write_xmit tso_segs = tcp_init_tso_segs(skb, mss_now); tcp_set_skb_tso_segs tcp_skb_pcount_set // skb->len = 524288, mss_now = 8 // u16 tso_segs = 524288/8 = 65535 -> 0 tso_segs = DIV_ROUND_UP(skb->len, mss_now) BUG_ON(!tso_segs) Agregar verificación para el valor mínimo de gso_max_size y gso_ipv4_max_size."
    }
  ],
  "lastModified": "2026-06-17T08:04:01.957",
  "configurations": [
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}