Vulnerability-Lookup

GHSA-FGXJ-VFG7-CPQQ

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-25 09:31

Details

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

KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

walk_s1() and kvm_walk_nested_s2() expect to be called while holding kvm->srcu to guard against memslot changes. While this is generally the case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the respective walkers without taking kvm->srcu.

Fix by acquiring kvm->srcu prior to the table walk in both instances.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53277"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation\n\nwalk_s1() and kvm_walk_nested_s2() expect to be called while holding\nkvm-\u003esrcu to guard against memslot changes. While this is generally\nthe case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the\nrespective walkers without taking kvm-\u003esrcu.\n\nFix by acquiring kvm-\u003esrcu prior to the table walk in both instances.",
  "id": "GHSA-fgxj-vfg7-cpqq",
  "modified": "2026-06-25T09:31:23Z",
  "published": "2026-06-25T09:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53277"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53277 (GCVE-0-2026-53277)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:40 – Updated: 2026-06-25 08:40

Title

KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation walk_s1() and kvm_walk_nested_s2() expect to be called while holding kvm->srcu to guard against memslot changes. While this is generally the case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the respective walkers without taking kvm->srcu. Fix by acquiring kvm->srcu prior to the table walk in both instances.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/97706097f9b851cfe…
https://git.kernel.org/stable/c/ec42b4ed1b072ea2d…
https://git.kernel.org/stable/c/f2ca45b50d4216c9c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: be04cebf3e78874627dc1042991d5d504464a5cc , < 97706097f9b851cfe55c3b00b083dfc2bcf542bc (git) Affected: be04cebf3e78874627dc1042991d5d504464a5cc , < ec42b4ed1b072ea2d03f086061aa67bad6d8de39 (git) Affected: be04cebf3e78874627dc1042991d5d504464a5cc , < f2ca45b50d4216c9cc7ffabf50d9ad1932209251 (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/at.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "97706097f9b851cfe55c3b00b083dfc2bcf542bc",
              "status": "affected",
              "version": "be04cebf3e78874627dc1042991d5d504464a5cc",
              "versionType": "git"
            },
            {
              "lessThan": "ec42b4ed1b072ea2d03f086061aa67bad6d8de39",
              "status": "affected",
              "version": "be04cebf3e78874627dc1042991d5d504464a5cc",
              "versionType": "git"
            },
            {
              "lessThan": "f2ca45b50d4216c9cc7ffabf50d9ad1932209251",
              "status": "affected",
              "version": "be04cebf3e78874627dc1042991d5d504464a5cc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/at.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": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "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": "6.18.36",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation\n\nwalk_s1() and kvm_walk_nested_s2() expect to be called while holding\nkvm-\u003esrcu to guard against memslot changes. While this is generally\nthe case, __kvm_at_s12() and __kvm_find_s1_desc_level() call into the\nrespective walkers without taking kvm-\u003esrcu.\n\nFix by acquiring kvm-\u003esrcu prior to the table walk in both instances."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T08:40:00.458Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/97706097f9b851cfe55c3b00b083dfc2bcf542bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec42b4ed1b072ea2d03f086061aa67bad6d8de39"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2ca45b50d4216c9cc7ffabf50d9ad1932209251"
        }
      ],
      "title": "KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53277",
    "datePublished": "2026-06-25T08:40:00.458Z",
    "dateReserved": "2026-06-09T07:44:35.395Z",
    "dateUpdated": "2026-06-25T08:40:00.458Z",
    "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-FGXJ-VFG7-CPQQ

CVE-2026-53277 (GCVE-0-2026-53277)

Tags

Sightings

Nomenclature