CVE-2026-43089 (GCVE-0-2026-43089)
Vulnerability from cvelistv5
Published
2026-05-06 07:40
Modified
2026-06-01 16:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_mapping() struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zeroing out the whole structure before setting individual variables.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
Version: 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_user.c"
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "lessThan": "2.6.29",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.136",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.12.83",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
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              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-01T16:14:29.152Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"
        },
        {
          "url": "https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"
        }
      ],
      "title": "xfrm_user: fix info leak in build_mapping()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43089",
    "datePublished": "2026-05-06T07:40:22.630Z",
    "dateReserved": "2026-05-01T14:12:55.984Z",
    "dateUpdated": "2026-06-01T16:14:29.152Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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