FKIE_CVE-2026-98726

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix underflow in ANA log bounds checks The number of ANA groups advertised through Identify Controller sizes the ANA log buffer. The ANA log header and group descriptors independently supply the number of groups and namespace IDs to parse. Both bounds checks subtract an untrusted object size from ana_log_size before comparing the current offset. If the object is larger than the buffer, the size_t subtraction underflows and lets the parser read beyond ana_log_buf. Check the current offset before the first subtraction and compare each object size with the remaining buffer instead. This rejects inconsistent ANA data before dereferencing a truncated group descriptor or walking an oversized namespace ID array.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03a0c21f0fd7a872953aae5714303d8f38d1e567
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08ab1e2dddf26248d5e6246046096b281cf5a319
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3045128294d347fd38542ad6e174b1b34d9c0751
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52c4294f3c26ec9db0e6f2e599096673d6f0f34d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63fa2d9c9c37020bd2703fe2a6a38027b5abeb15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5cdb0c0a51e8ff49914ae16ef5360010c40cc85
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe6e003c132b7c204f63e7a7ec422904fa3141b6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/multipath.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "52c4294f3c26ec9db0e6f2e599096673d6f0f34d",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "fe6e003c132b7c204f63e7a7ec422904fa3141b6",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "08ab1e2dddf26248d5e6246046096b281cf5a319",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "3045128294d347fd38542ad6e174b1b34d9c0751",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "03a0c21f0fd7a872953aae5714303d8f38d1e567",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "e5cdb0c0a51e8ff49914ae16ef5360010c40cc85",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            },
            {
              "lessThan": "63fa2d9c9c37020bd2703fe2a6a38027b5abeb15",
              "status": "affected",
              "version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/multipath.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-multipath: fix underflow in ANA log bounds checks\n\nThe number of ANA groups advertised through Identify Controller sizes the\nANA log buffer. The ANA log header and group descriptors independently\nsupply the number of groups and namespace IDs to parse.\n\nBoth bounds checks subtract an untrusted object size from ana_log_size\nbefore comparing the current offset. If the object is larger than the\nbuffer, the size_t subtraction underflows and lets the parser read beyond\nana_log_buf.\n\nCheck the current offset before the first subtraction and compare each\nobject size with the remaining buffer instead. This rejects inconsistent\nANA data before dereferencing a truncated group descriptor or walking an\noversized namespace ID array."
    }
  ],
  "id": "CVE-2026-98726",
  "lastModified": "2026-10-30T13:21:21.580",
  "metrics": {},
  "published": "2026-10-18T16:17:26.237",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/03a0c21f0fd7a872953aae5714303d8f38d1e567"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08ab1e2dddf26248d5e6246046096b281cf5a319"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3045128294d347fd38542ad6e174b1b34d9c0751"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52c4294f3c26ec9db0e6f2e599096673d6f0f34d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63fa2d9c9c37020bd2703fe2a6a38027b5abeb15"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e5cdb0c0a51e8ff49914ae16ef5360010c40cc85"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe6e003c132b7c204f63e7a7ec422904fa3141b6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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