Vulnerability-Lookup

GHSA-98CQ-CJV3-CJRC

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-06 12:30

Details

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

xfrm: fix refcount leak in xfrm_migrate_policy_find

syzkaller reported a memory leak in xfrm_policy_alloc:

BUG: memory leak unreferenced object 0xffff888114d79000 (size 1024): comm "syz.1.17", pid 931 ... xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432

The root cause is a double call to xfrm_pol_hold_rcu() in xfrm_migrate_policy_find(). The lookup function already returns a policy with held reference, making the second call redundant.

Remove the redundant xfrm_pol_hold_rcu() call to fix the refcount imbalance and prevent the memory leak.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43090"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T10:16:22Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix refcount leak in xfrm_migrate_policy_find\n\nsyzkaller reported a memory leak in xfrm_policy_alloc:\n\n  BUG: memory leak\n  unreferenced object 0xffff888114d79000 (size 1024):\n    comm \"syz.1.17\", pid 931\n    ...\n    xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432\n\nThe root cause is a double call to xfrm_pol_hold_rcu() in\nxfrm_migrate_policy_find(). The lookup function already returns\na policy with held reference, making the second call redundant.\n\nRemove the redundant xfrm_pol_hold_rcu() call to fix the refcount\nimbalance and prevent the memory leak.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
  "id": "GHSA-98cq-cjv3-cjrc",
  "modified": "2026-05-06T12:30:27Z",
  "published": "2026-05-06T12:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43090"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-43090 (GCVE-0-2026-43090)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-06 07:40

Title

xfrm: fix refcount leak in xfrm_migrate_policy_find

Summary

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix refcount leak in xfrm_migrate_policy_find syzkaller reported a memory leak in xfrm_policy_alloc: BUG: memory leak unreferenced object 0xffff888114d79000 (size 1024): comm "syz.1.17", pid 931 ... xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432 The root cause is a double call to xfrm_pol_hold_rcu() in xfrm_migrate_policy_find(). The lookup function already returns a policy with held reference, making the second call redundant. Remove the redundant xfrm_pol_hold_rcu() call to fix the refcount imbalance and prevent the memory leak. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/21e235a36cfb6d145…
	https://git.kernel.org/stable/c/836ee1b0426ea3db3…
	https://git.kernel.org/stable/c/70c2a89a3bc207c3b…
	https://git.kernel.org/stable/c/83317cce60a032c49…

Impacted products

Vendor

Product

Version

Linux

Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 21e235a36cfb6d145cefb10728f12f5dc5412f54 (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 836ee1b0426ea3db31531e9581cc32f513d24e32 (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 83317cce60a032c49480dcdabe146435bd689d03 (git)

Linux

Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_policy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "21e235a36cfb6d145cefb10728f12f5dc5412f54",
              "status": "affected",
              "version": "563d5ca93e883b9dcb4b7dc8967ac569fd91820d",
              "versionType": "git"
            },
            {
              "lessThan": "836ee1b0426ea3db31531e9581cc32f513d24e32",
              "status": "affected",
              "version": "563d5ca93e883b9dcb4b7dc8967ac569fd91820d",
              "versionType": "git"
            },
            {
              "lessThan": "70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a",
              "status": "affected",
              "version": "563d5ca93e883b9dcb4b7dc8967ac569fd91820d",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "563d5ca93e883b9dcb4b7dc8967ac569fd91820d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/xfrm_policy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "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": "6.12.83",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.12",
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                },
                {
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                }
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              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix refcount leak in xfrm_migrate_policy_find\n\nsyzkaller reported a memory leak in xfrm_policy_alloc:\n\n  BUG: memory leak\n  unreferenced object 0xffff888114d79000 (size 1024):\n    comm \"syz.1.17\", pid 931\n    ...\n    xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432\n\nThe root cause is a double call to xfrm_pol_hold_rcu() in\nxfrm_migrate_policy_find(). The lookup function already returns\na policy with held reference, making the second call redundant.\n\nRemove the redundant xfrm_pol_hold_rcu() call to fix the refcount\nimbalance and prevent the memory leak.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T07:40:23.286Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54"
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        },
        {
          "url": "https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"
        },
        {
          "url": "https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03"
        }
      ],
      "title": "xfrm: fix refcount leak in xfrm_migrate_policy_find",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43090",
    "datePublished": "2026-05-06T07:40:23.286Z",
    "dateReserved": "2026-05-01T14:12:55.984Z",
    "dateUpdated": "2026-05-06T07:40:23.286Z",
    "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

GHSA-98CQ-CJV3-CJRC

CVE-2026-43090 (GCVE-0-2026-43090)

Tags

Sightings

Nomenclature