fkie_cve-2024-39490
Vulnerability from fkie_nvd
Published
2024-07-10 08:15
Modified
2025-03-24 17:23
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix missing sk_buff release in seg6_input_core The seg6_input() function is responsible for adding the SRH into a packet, delegating the operation to the seg6_input_core(). This function uses the skb_cow_head() to ensure that there is sufficient headroom in the sk_buff for accommodating the link-layer header. In the event that the skb_cow_header() function fails, the seg6_input_core() catches the error but it does not release the sk_buff, which will result in a memory leak. This issue was introduced in commit af3b5158b89d ("ipv6: sr: fix BUG due to headroom too small after SRH push") and persists even after commit 7a3f5b0de364 ("netfilter: add netfilter hooks to SRv6 data plane"), where the entire seg6_input() code was refactored to deal with netfilter hooks. The proposed patch addresses the identified memory leak by requiring the seg6_input_core() function to release the sk_buff in the event that skb_cow_head() fails.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
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      "nodes": [
        {
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sr: fix missing sk_buff release in seg6_input_core\n\nThe seg6_input() function is responsible for adding the SRH into a\npacket, delegating the operation to the seg6_input_core(). This function\nuses the skb_cow_head() to ensure that there is sufficient headroom in\nthe sk_buff for accommodating the link-layer header.\nIn the event that the skb_cow_header() function fails, the\nseg6_input_core() catches the error but it does not release the sk_buff,\nwhich will result in a memory leak.\n\nThis issue was introduced in commit af3b5158b89d (\"ipv6: sr: fix BUG due\nto headroom too small after SRH push\") and persists even after commit\n7a3f5b0de364 (\"netfilter: add netfilter hooks to SRv6 data plane\"),\nwhere the entire seg6_input() code was refactored to deal with netfilter\nhooks.\n\nThe proposed patch addresses the identified memory leak by requiring the\nseg6_input_core() function to release the sk_buff in the event that\nskb_cow_head() fails."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: ipv6: sr: corrige la versi\u00f3n faltante de sk_buff en seg6_input_core La funci\u00f3n seg6_input() es responsable de agregar el SRH a un paquete, delegando la operaci\u00f3n al seg6_input_core(). Esta funci\u00f3n utiliza skb_cow_head() para garantizar que haya suficiente espacio libre en sk_buff para acomodar el encabezado de la capa de enlace. En caso de que la funci\u00f3n skb_cow_header() falle, seg6_input_core() detecta el error pero no libera sk_buff, lo que provocar\u00e1 una p\u00e9rdida de memoria. Este problema se introdujo en el commit af3b5158b89d (\"ipv6: sr: corrige el ERROR debido a un espacio libre demasiado peque\u00f1o despu\u00e9s de la inserci\u00f3n de SRH\") y persiste incluso despu\u00e9s de el commit 7a3f5b0de364 (\"netfilter: agregue enlaces de netfilter al plano de datos SRv6\"), donde todo el seg6_input( ) el c\u00f3digo fue refactorizado para lidiar con los ganchos de netfilter. El parche propuesto aborda la p\u00e9rdida de memoria identificada al requerir que la funci\u00f3n seg6_input_core() libere sk_buff en caso de que skb_cow_head() falle."
    }
  ],
  "id": "CVE-2024-39490",
  "lastModified": "2025-03-24T17:23:25.253",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
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  "published": "2024-07-10T08:15:11.203",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-401"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
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}


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