Vulnerability-Lookup

GHSA-RV96-Q2G6-R95W

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

xfrm_user: fix info leak in build_report()

struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31671"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_report()\n\nstruct xfrm_user_report is a __u8 proto field followed by a struct\nxfrm_selector which means there is three \"empty\" bytes of padding, but\nthe padding is never zeroed before copying to userspace.  Fix that up by\nzeroing the structure before setting individual member variables.",
  "id": "GHSA-rv96-q2g6-r95w",
  "modified": "2026-04-24T15:32:37Z",
  "published": "2026-04-24T15:32:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31671"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31671 (GCVE-0-2026-31671)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:45 – Updated: 2026-04-25 05:48

Title

xfrm_user: fix info leak in build_report()

Summary

In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d27c02eec529f7805…
	https://git.kernel.org/stable/c/716c546e88cfe49d8…
	https://git.kernel.org/stable/c/0616314b3b34f24cb…
	https://git.kernel.org/stable/c/e0c8542c3d097ed42…
	https://git.kernel.org/stable/c/ff5ee507302303b15…
	https://git.kernel.org/stable/c/6c55714c931051cd7…
	https://git.kernel.org/stable/c/0a30dceb0e1f0c480…
	https://git.kernel.org/stable/c/d10119968d0e1f2b6…

Impacted products

Vendor

Product

Version

Linux

Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < d27c02eec529f78055a46a5c9e6c62684382b2d8 (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < 716c546e88cfe49d841658240e10cb57bc50a2cc (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < 0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9 (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < e0c8542c3d097ed4205ded51868195d5d6ddac62 (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < ff5ee507302303b15859753c3e0d67d38fd12c88 (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < 6c55714c931051cd7f4839c19ce0867179fd22fe (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < 0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72 (git)
Affected: 97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5 , < d10119968d0e1f2b669604baf2a8b5fdb72fa6b4 (git)

Linux

Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.169 , ≤ 6.1.* (semver)
Unaffected: 6.6.135 , ≤ 6.6.* (semver)
Unaffected: 6.12.82 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.19"
            },
            {
              "lessThan": "2.6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.169",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.135",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.15.203",
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                  "vulnerable": true
                },
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                },
                {
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc"
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        {
          "url": "https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4"
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      "title": "xfrm_user: fix info leak in build_report()",
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31671",
    "datePublished": "2026-04-24T14:45:18.669Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-04-25T05:48:30.115Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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

GHSA-RV96-Q2G6-R95W

CVE-2026-31671 (GCVE-0-2026-31671)

Tags

Sightings

Nomenclature