CVE-2026-45897 (GCVE-0-2026-45897)
Vulnerability from cvelistv5
Published
2026-05-27 12:17
Modified
2026-08-03 09:32
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_counter: serialize reset with spinlock Add a global static spinlock to serialize counter fetch+reset operations, preventing concurrent dump-and-reset from underrunning values. The lock is taken before fetching the total so that two parallel resets cannot both read the same counter values and then both subtract them. A global lock is used for simplicity since resets are infrequent. If this becomes a bottleneck, it can be replaced with a per-net lock later.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3cb03edb4de33fd04c4ea55f47397b96a8657c53
Version: 3cb03edb4de33fd04c4ea55f47397b96a8657c53
Version: 3cb03edb4de33fd04c4ea55f47397b96a8657c53
Version: 3cb03edb4de33fd04c4ea55f47397b96a8657c53
Version: fb1adb05ea87b6149e65a31e511756c4f470d0cd
Version: f123293db16dcd0cd81b246ae60e6362f0025d0a
Version: 6.1.107   ≤
Version: 6.6.48   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_counter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "48cf7918d10c66cb6b05226fa3fa5daf0c891089",
              "status": "affected",
              "version": "3cb03edb4de33fd04c4ea55f47397b96a8657c53",
              "versionType": "git"
            },
            {
              "lessThan": "cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1",
              "status": "affected",
              "version": "3cb03edb4de33fd04c4ea55f47397b96a8657c53",
              "versionType": "git"
            },
            {
              "lessThan": "0cdc6d5a26f2d1f7f15a43526841b679445c32e2",
              "status": "affected",
              "version": "3cb03edb4de33fd04c4ea55f47397b96a8657c53",
              "versionType": "git"
            },
            {
              "lessThan": "779c60a5190c42689534172f4b49e927c9959e4e",
              "status": "affected",
              "version": "3cb03edb4de33fd04c4ea55f47397b96a8657c53",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fb1adb05ea87b6149e65a31e511756c4f470d0cd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f123293db16dcd0cd81b246ae60e6362f0025d0a",
              "versionType": "git"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.107",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.48",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_counter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "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": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.107",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.48",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_counter: serialize reset with spinlock\n\nAdd a global static spinlock to serialize counter fetch+reset\noperations, preventing concurrent dump-and-reset from underrunning\nvalues.\n\nThe lock is taken before fetching the total so that two parallel\nresets cannot both read the same counter values and then both\nsubtract them.\n\nA global lock is used for simplicity since resets are infrequent.\nIf this becomes a bottleneck, it can be replaced with a per-net\nlock later."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-03T09:32:30.454Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/48cf7918d10c66cb6b05226fa3fa5daf0c891089"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cdc6d5a26f2d1f7f15a43526841b679445c32e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e"
        }
      ],
      "title": "netfilter: nft_counter: serialize reset with spinlock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45897",
    "datePublished": "2026-05-27T12:17:07.038Z",
    "dateReserved": "2026-05-13T15:03:33.083Z",
    "dateUpdated": "2026-08-03T09:32:30.454Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.