CVE-2026-98526

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.22 %higher than 12% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

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

llc: reserve device headroom for allocated frames

llc_alloc_frame() reserves link-layer headroom using the device type. This is insufficient for stacked Ethernet devices such as VLAN devices, where vlan_dev_hard_header() pushes a VLAN header before the lower device's Ethernet header. An LLC response on such a device can therefore underflow skb headroom in eth_header().

Use LL_RESERVED_SPACE() to account for the device's actual required headroom while preserving the existing LLC device-type check.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.22 %
Percentile among all scored CVEs: 12
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Show 8 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-98526",
  "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": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "018020f5a48cc86fdd6dc2d380f6c70443ae7639",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "7c38524b2b2456bd33cb360420da6cbf9cad1b33",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "1937222c2511ac91377d39f28106c34734f5f8c6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "16ceac2daa89dd16917bc488ab05b9dd6961a603",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "e06f8b6e27cc616d3c587e9784c4a033eb310a16",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "3361c93e417384ebf28003e0fb6d5304653d3b05",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
              "lessThan": "72b5b9a28b996e09b8b5b944370c79851bb68f52",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/llc/llc_sap.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.34"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.34",
              "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": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/llc/llc_sap.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:04.063",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/018020f5a48cc86fdd6dc2d380f6c70443ae7639",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/16ceac2daa89dd16917bc488ab05b9dd6961a603",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1937222c2511ac91377d39f28106c34734f5f8c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3361c93e417384ebf28003e0fb6d5304653d3b05",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/72b5b9a28b996e09b8b5b944370c79851bb68f52",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7c38524b2b2456bd33cb360420da6cbf9cad1b33",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e06f8b6e27cc616d3c587e9784c4a033eb310a16",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: reserve device headroom for allocated frames\n\nllc_alloc_frame() reserves link-layer headroom using the device type.\nThis is insufficient for stacked Ethernet devices such as VLAN devices,\nwhere vlan_dev_hard_header() pushes a VLAN header before the lower\ndevice's Ethernet header. An LLC response on such a device can\ntherefore underflow skb headroom in eth_header().\n\nUse LL_RESERVED_SPACE() to account for the device's actual required\nheadroom while preserving the existing LLC device-type check."
    }
  ],
  "lastModified": "2026-10-19T10:19:07.830",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}