Vulnerability-Lookup

FKIE_CVE-2026-46093

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-05-27 14:48

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: take vmap_purge_lock in shrinker decay_va_pool_node() can be invoked concurrently from two paths: __purge_vmap_area_lazy() when pools are being purged, and the shrinker via vmap_node_shrink_scan(). However, decay_va_pool_node() is not safe to run concurrently, and the shrinker path currently lacks serialization, leading to races and possible leaks. Protect decay_va_pool_node() by taking vmap_purge_lock in the shrinker path to ensure serialization with purge users.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: take vmap_purge_lock in shrinker\n\ndecay_va_pool_node() can be invoked concurrently from two paths:\n__purge_vmap_area_lazy() when pools are being purged, and the shrinker via\nvmap_node_shrink_scan().\n\nHowever, decay_va_pool_node() is not safe to run concurrently, and the\nshrinker path currently lacks serialization, leading to races and possible\nleaks.\n\nProtect decay_va_pool_node() by taking vmap_purge_lock in the shrinker\npath to ensure serialization with purge users."
    }
  ],
  "id": "CVE-2026-46093",
  "lastModified": "2026-05-27T14:48:03.013",
  "metrics": {},
  "published": "2026-05-27T14:17:30.860",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-46093 (GCVE-0-2026-46093)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:58 – Updated: 2026-05-27 12:58

Title

mm/vmalloc: take vmap_purge_lock in shrinker

Summary

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/687ccdf582169cd68…
https://git.kernel.org/stable/c/12f2341b4c235d559…
https://git.kernel.org/stable/c/ec05f51f1e65bce95…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7679ba6b36dbb300b757b672d6a32a606499e14b , < 687ccdf582169cd680aeaf24cc953807c4cd4345 (git) Affected: 7679ba6b36dbb300b757b672d6a32a606499e14b , < 12f2341b4c235d5593a433abac201c1c6725787f (git) Affected: 7679ba6b36dbb300b757b672d6a32a606499e14b , < ec05f51f1e65bce95528543eb73fda56fd201d94 (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/vmalloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "687ccdf582169cd680aeaf24cc953807c4cd4345",
              "status": "affected",
              "version": "7679ba6b36dbb300b757b672d6a32a606499e14b",
              "versionType": "git"
            },
            {
              "lessThan": "12f2341b4c235d5593a433abac201c1c6725787f",
              "status": "affected",
              "version": "7679ba6b36dbb300b757b672d6a32a606499e14b",
              "versionType": "git"
            },
            {
              "lessThan": "ec05f51f1e65bce95528543eb73fda56fd201d94",
              "status": "affected",
              "version": "7679ba6b36dbb300b757b672d6a32a606499e14b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/vmalloc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc1",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: take vmap_purge_lock in shrinker\n\ndecay_va_pool_node() can be invoked concurrently from two paths:\n__purge_vmap_area_lazy() when pools are being purged, and the shrinker via\nvmap_node_shrink_scan().\n\nHowever, decay_va_pool_node() is not safe to run concurrently, and the\nshrinker path currently lacks serialization, leading to races and possible\nleaks.\n\nProtect decay_va_pool_node() by taking vmap_purge_lock in the shrinker\npath to ensure serialization with purge users."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:58:43.458Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345"
        },
        {
          "url": "https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94"
        }
      ],
      "title": "mm/vmalloc: take vmap_purge_lock in shrinker",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46093",
    "datePublished": "2026-05-27T12:58:43.458Z",
    "dateReserved": "2026-05-13T15:03:33.097Z",
    "dateUpdated": "2026-05-27T12:58:43.458Z",
    "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

FKIE_CVE-2026-46093

CVE-2026-46093 (GCVE-0-2026-46093)

Tags

Sightings

Nomenclature