« Volver al listado

CVE-2026-90157

Estado: RecibidaSin puntuar—

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

bpf: Reject negative optlen in cgroup getsockopt hook

A cgroup getsockopt BPF program can shrink ctx->optlen after the kernel getsockopt handler has run. The kernel-buffer variant, used by TCP_ZEROCOPY_RECEIVE, only rejects values larger than the original length.

If BPF writes a negative optlen, that value is accepted and propagated back to the TCP getsockopt code. It can then be passed to copy_to_sockptr() as a size_t and trigger the hardened usercopy bytes > INT_MAX warning.

Reject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(), matching the lower-bound validation already present in the sockptr-based getsockopt hook.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-90157",
  "cveTags": [],
  "metrics": {},
  "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": "08f61a34913558e06576e7b6318bf583f273c1be",
              "lessThan": "5b09d984b38b018b123c3a9e02a96bbc6468dbe5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "554ba7195c4108726450e24480c8449990c2268c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "d02a12b4085ffe41ea750b1007f7a9c7aee2875a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "f68671b1a98d426c57864bd457c125fee14ac1a5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "2bdbe00454200fcb0110f31eeca8d906a3515e74",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "31a89af4f513d750fec196e2bb6195a7d4473e9f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9cacf81f8161111db25f98e78a7a0e32ae142b3f",
              "lessThan": "1b5aacd5b2419b0790e955e466d389a61c79b4b1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.10.188",
              "lessThan": "5.10.270",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "kernel/bpf/cgroup.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/cgroup.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:08.817",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx->optlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes > INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook."
    }
  ],
  "lastModified": "2026-09-17T17:17:08.817",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}