Vulnerability-Lookup

FKIE_CVE-2026-68158

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplication overflow in decode_new_up_state_weight() If a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted osdmap, out-of-bounds memory accesses may occur in decode_new_up_state_weight(). This happens because the bounds check for the new_state part is based on calculating its length depending on a len value read from the incoming message. This calculation may overflow leading to an incorrect bounds check. Subsequently, out-of-bounds reads may occur when decoding this part. This patch switches the multiplication to use check_mul_overflow() to abort processing the osdmap if an overflow occurred. Therefore, osdmaps/messages containing large values for len that result in a multiplication overflow are treated as invalid. [ idryomov: rename new_state_len -> new_state_item_size, formatting ]

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ceee3b77b83052648c40fef965f836fd7699d26",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "e4473751cc37db41f3f7da25d64a23e0c74570f1",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "f6961070c326bd158c38fa48756cde2bd78c4aaa",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "05c90e059269f087becfcce23348496085835c29",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7405d73cea0d0e6c541f5c534078feeb46188844",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "032951d32c13b7564dfba82758260cb7aa1149d2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "14877928f10667a5606383885d004f7185f33718",
              "versionType": "git"
            },
            {
              "lessThan": "3.11",
              "status": "affected",
              "version": "3.10.103",
              "versionType": "semver"
            },
            {
              "lessThan": "3.13",
              "status": "affected",
              "version": "3.12.63",
              "versionType": "semver"
            },
            {
              "lessThan": "3.15",
              "status": "affected",
              "version": "3.14.75",
              "versionType": "semver"
            },
            {
              "lessThan": "3.17",
              "status": "affected",
              "version": "3.16.39",
              "versionType": "semver"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.39",
              "versionType": "semver"
            },
            {
              "lessThan": "4.2",
              "status": "affected",
              "version": "4.1.30",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.17",
              "versionType": "semver"
            },
            {
              "lessThan": "4.7",
              "status": "affected",
              "version": "4.6.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -\u003e new_state_item_size, formatting ]"
    }
  ],
  "id": "CVE-2026-68158",
  "lastModified": "2026-08-19T17:20:33.133",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-10T13:20:02.033",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-68158 (GCVE-0-2026-68158)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30

Title

libceph: Fix multiplication overflow in decode_new_up_state_weight()

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/2ceee3b77b8305264…
https://git.kernel.org/stable/c/e4473751cc37db41f…
https://git.kernel.org/stable/c/f6961070c326bd158…
https://git.kernel.org/stable/c/05c90e059269f087b…
https://git.kernel.org/stable/c/143ba49ead77ec483…
https://git.kernel.org/stable/c/1732d89dfcd74f6fd…
https://git.kernel.org/stable/c/bee4b5b53e7bff046…
https://git.kernel.org/stable/c/98917a499ec7064c1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 2ceee3b77b83052648c40fef965f836fd7699d26 (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < e4473751cc37db41f3f7da25d64a23e0c74570f1 (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < f6961070c326bd158c38fa48756cde2bd78c4aaa (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 05c90e059269f087becfcce23348496085835c29 (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 143ba49ead77ec483c0326f8aaad8649874e99c4 (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 1732d89dfcd74f6fde9ce70900d316c4a151c153 (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < bee4b5b53e7bff0467fd916cc44c9b190733c6bd (git) Affected: 930c532869774ebf8af9efe9484c597f896a7d46 , < 98917a499ec7064c14fc56d180a4fd636fc2784c (git) Affected: 1196c36fd53c3b1615eb02f986cb727b1dfc1047 (git) Affected: bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196 (git) Affected: 6b96b2d473701b45df3fea8dd9796b6ec39e6d54 (git) Affected: 7405d73cea0d0e6c541f5c534078feeb46188844 (git) Affected: 8777c9f654637d56f4c4ca54eb1bc7c609b70085 (git) Affected: 6831c98ce0b8a3e88db64aa224372effd0dcc694 (git) Affected: 032951d32c13b7564dfba82758260cb7aa1149d2 (git) Affected: 14877928f10667a5606383885d004f7185f33718 (git) Affected: 3.10.103 , < 3.11 (semver) Affected: 3.12.63 , < 3.13 (semver) Affected: 3.14.75 , < 3.15 (semver) Affected: 3.16.39 , < 3.17 (semver) Affected: 3.18.39 , < 3.19 (semver) Affected: 4.1.30 , < 4.2 (semver) Affected: 4.4.17 , < 4.5 (semver) Affected: 4.6.6 , < 4.7 (semver)
Linux	Linux	Affected: 4.7 Unaffected: 0 , < 4.7 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ceee3b77b83052648c40fef965f836fd7699d26",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "e4473751cc37db41f3f7da25d64a23e0c74570f1",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "f6961070c326bd158c38fa48756cde2bd78c4aaa",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "05c90e059269f087becfcce23348496085835c29",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "143ba49ead77ec483c0326f8aaad8649874e99c4",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "1732d89dfcd74f6fde9ce70900d316c4a151c153",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "bee4b5b53e7bff0467fd916cc44c9b190733c6bd",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "lessThan": "98917a499ec7064c14fc56d180a4fd636fc2784c",
              "status": "affected",
              "version": "930c532869774ebf8af9efe9484c597f896a7d46",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1196c36fd53c3b1615eb02f986cb727b1dfc1047",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bbc3aa6b0e6050b2b2e04a08dd4d6423d576b196",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6b96b2d473701b45df3fea8dd9796b6ec39e6d54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7405d73cea0d0e6c541f5c534078feeb46188844",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8777c9f654637d56f4c4ca54eb1bc7c609b70085",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6831c98ce0b8a3e88db64aa224372effd0dcc694",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "032951d32c13b7564dfba82758260cb7aa1149d2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "14877928f10667a5606383885d004f7185f33718",
              "versionType": "git"
            },
            {
              "lessThan": "3.11",
              "status": "affected",
              "version": "3.10.103",
              "versionType": "semver"
            },
            {
              "lessThan": "3.13",
              "status": "affected",
              "version": "3.12.63",
              "versionType": "semver"
            },
            {
              "lessThan": "3.15",
              "status": "affected",
              "version": "3.14.75",
              "versionType": "semver"
            },
            {
              "lessThan": "3.17",
              "status": "affected",
              "version": "3.16.39",
              "versionType": "semver"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.39",
              "versionType": "semver"
            },
            {
              "lessThan": "4.2",
              "status": "affected",
              "version": "4.1.30",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.17",
              "versionType": "semver"
            },
            {
              "lessThan": "4.7",
              "status": "affected",
              "version": "4.6.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.10.103",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.12.63",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.14.75",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.16.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.18.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.1.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix multiplication overflow in decode_new_up_state_weight()\n\nIf a message of type CEPH_MSG_OSD_MAP contains a (maliciously) corrupted\nosdmap, out-of-bounds memory accesses may occur in\ndecode_new_up_state_weight(). This happens because the bounds check for\nthe new_state part is based on calculating its length depending on a len\nvalue read from the incoming message. This calculation may overflow\nleading to an incorrect bounds check. Subsequently, out-of-bounds reads\nmay occur when decoding this part.\n\nThis patch switches the multiplication to use check_mul_overflow() to\nabort processing the osdmap if an overflow occurred. Therefore,\nosdmaps/messages containing large values for len that result in a\nmultiplication overflow are treated as invalid.\n\n[ idryomov: rename new_state_len -\u003e new_state_item_size, formatting ]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Malformed incremental osdmap data is delivered in CEPH_MSG_OSD_MAP over TCP from a Ceph monitor (mon_dispatch) or OSD (osd_dispatch) to libceph clients (CephFS/RBD), and the overflow is triggered while decoding received network bytes in osdmap_apply_incremental().\nAC:L - A compromised or attacker-controlled monitor/OSD can publish an incremental osdmap with epoch N+1 and a crafted new_state length that wraps the multiply, reliably bypassing bounds checks without races or victim-specific memory layout.\nPR:N - Exploitation requires no privileges on the victim host; a malicious cluster peer or on-path attacker that can deliver forged osdmaps to an already-connected kernel Ceph client needs no local account, capabilities, or user-namespace tricks.\nUI:N - Once a host is a Ceph client, osdmap subscriptions and updates are applied automatically by the kernel; no additional mount, open, or interactive step is needed at exploit time beyond the existing client session.\nS:U - Impact is confined to kernel memory and libceph client state on the Ceph client host (info leak, map corruption, crash, or privilege escalation); it does not cross VM, IOMMU, or sandbox boundaries to another security authority.\nC:H - Integer-overflow bypass lets decode_new_up_state_weight() run bare ceph_decode_32/8 loops past the message end, performing out-of-bounds reads of adjacent kernel heap/slack memory that can disclose pointers and other sensitive data.\nI:H - Misaligned decoding also drives attacker-controlled osd/xorstate/weight values into map-\u003eosd_weight[], map-\u003eosd_state[], and map-\u003eosd_addr[] updates (including memset), corrupting kernel osdmap state in ways usable for further exploitation.\nA:H - Unbounded out-of-bounds reads while parsing osdmaps can fault on unmapped pages and trigger kernel oops/panic; map corruption can also cause persistent client failure, repeatable on each malicious incremental map."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:30:30.014Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2ceee3b77b83052648c40fef965f836fd7699d26"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4473751cc37db41f3f7da25d64a23e0c74570f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/f6961070c326bd158c38fa48756cde2bd78c4aaa"
        },
        {
          "url": "https://git.kernel.org/stable/c/05c90e059269f087becfcce23348496085835c29"
        },
        {
          "url": "https://git.kernel.org/stable/c/143ba49ead77ec483c0326f8aaad8649874e99c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1732d89dfcd74f6fde9ce70900d316c4a151c153"
        },
        {
          "url": "https://git.kernel.org/stable/c/bee4b5b53e7bff0467fd916cc44c9b190733c6bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/98917a499ec7064c14fc56d180a4fd636fc2784c"
        }
      ],
      "title": "libceph: Fix multiplication overflow in decode_new_up_state_weight()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68158",
    "datePublished": "2026-08-10T11:59:24.675Z",
    "dateReserved": "2026-07-30T09:28:09.371Z",
    "dateUpdated": "2026-08-19T16:30:30.014Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-68158

CVE-2026-68158 (GCVE-0-2026-68158)

Tags

Sightings

Nomenclature