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net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into rule_locs[] without consulting nfc->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed CFP rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it.

Announced Source revision 1
Original source ↗

CVE-2026-98030

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98030

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "8e41ce02589c92356bfd8ef62f6ceff840546e1a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "f5e93162b3dd195bfda815e8f7a39aaf1d45437b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "f1a2869b3629c0e8394b77b38cb9f19a018c653c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "fd1a78c16b1f6978c09cf048e15f349732e4c707",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "b231b6d8516d3fe0d4bba549908e08d26a4531a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7318166cacad158b46240f66250d7cc5a481653b",
        "lessThan": "cdb719f4b8596d9ccee2d56d204c2c4dce982f46",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/dsa/bcm_sf2_cfp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.11",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/dsa/bcm_sf2_cfp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98030

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#38155 · Revision 1
Added to Heist Feed
Publisher date
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