Vulnerability-Lookup

FKIE_CVE-2026-52985

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function. Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "175556c049eaec14efde8c6475e763b7579b9de7",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "6e2cfd0904976e701d7a76b86b694e72af230ab0",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "1b7b6ae0e93b8d512e208b1378d74af052e4f4e7",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "818f7673ed7f4a29d4b9cee8184c47d6e57162b4",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "978ca6ff789f1f19c03288ac20cc1f4774e88490",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "750d0091bebf44975421268d37484ef87060d263",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "bc6002865e8c4fcf9e94975f7cf023448d8764e2",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "35eaa6d8d6c2ee65e96f507add856e0eacf24591",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\nnetdevsim: zero initialize struct iphdr in dummy sk_buff\n\nSyzbot reports a KMSAN uninit-value originating from\nnsim_dev_trap_skb_build, with the allocation also\nbeing performed in the same function.\n\nFix this by calling skb_put_zero instead of skb_put to\nguarantee zero initialization of the whole IP header."
    }
  ],
  "id": "CVE-2026-52985",
  "lastModified": "2026-06-24T17:17:09.260",
  "metrics": {},
  "published": "2026-06-24T17:17:09.260",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-52985 (GCVE-0-2026-52985)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28

Title

netdevsim: zero initialize struct iphdr in dummy sk_buff

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/175556c049eaec14e…
https://git.kernel.org/stable/c/6e2cfd0904976e701…
https://git.kernel.org/stable/c/1b7b6ae0e93b8d512…
https://git.kernel.org/stable/c/818f7673ed7f4a29d…
https://git.kernel.org/stable/c/978ca6ff789f1f19c…
https://git.kernel.org/stable/c/750d0091bebf44975…
https://git.kernel.org/stable/c/bc6002865e8c4fcf9…
https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 175556c049eaec14efde8c6475e763b7579b9de7 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 6e2cfd0904976e701d7a76b86b694e72af230ab0 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 1b7b6ae0e93b8d512e208b1378d74af052e4f4e7 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 818f7673ed7f4a29d4b9cee8184c47d6e57162b4 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 978ca6ff789f1f19c03288ac20cc1f4774e88490 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 750d0091bebf44975421268d37484ef87060d263 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < bc6002865e8c4fcf9e94975f7cf023448d8764e2 (git) Affected: da58f90f11f597520f226caff1d3cfc115abedc9 , < 35eaa6d8d6c2ee65e96f507add856e0eacf24591 (git)
Linux	Linux	Affected: 5.4 Unaffected: 0 , < 5.4 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "175556c049eaec14efde8c6475e763b7579b9de7",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "6e2cfd0904976e701d7a76b86b694e72af230ab0",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "1b7b6ae0e93b8d512e208b1378d74af052e4f4e7",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "818f7673ed7f4a29d4b9cee8184c47d6e57162b4",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "978ca6ff789f1f19c03288ac20cc1f4774e88490",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "750d0091bebf44975421268d37484ef87060d263",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "bc6002865e8c4fcf9e94975f7cf023448d8764e2",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            },
            {
              "lessThan": "35eaa6d8d6c2ee65e96f507add856e0eacf24591",
              "status": "affected",
              "version": "da58f90f11f597520f226caff1d3cfc115abedc9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: zero initialize struct iphdr in dummy sk_buff\n\nSyzbot reports a KMSAN uninit-value originating from\nnsim_dev_trap_skb_build, with the allocation also\nbeing performed in the same function.\n\nFix this by calling skb_put_zero instead of skb_put to\nguarantee zero initialization of the whole IP header."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:59.871Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490"
        },
        {
          "url": "https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591"
        }
      ],
      "title": "netdevsim: zero initialize struct iphdr in dummy sk_buff",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52985",
    "datePublished": "2026-06-24T16:28:59.871Z",
    "dateReserved": "2026-06-09T07:44:35.376Z",
    "dateUpdated": "2026-06-24T16:28:59.871Z",
    "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.

Action not permitted

FKIE_CVE-2026-52985

CVE-2026-52985 (GCVE-0-2026-52985)

Tags

Sightings

Nomenclature