CVE-2026-52985 (GCVE-0-2026-52985)
Vulnerability from cvelistv5
Published
2026-06-24 16:28
Modified
2026-06-24 16:28
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
Impacted products
Vendor Product Version
Linux Linux Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
Version: da58f90f11f597520f226caff1d3cfc115abedc9
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/netdevsim/dev.c"
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          "vendor": "Linux",
          "versions": [
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            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "5.10.258",
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              "version": "6.12.91",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "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"
      }
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  },
  "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"
}


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