Vulnerability-Lookup

CVE-2025-71072 (GCVE-0-2025-71072)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:31 – Updated: 2026-01-13 15:31

Title

shmem: fix recovery on rename failures

Summary

In the Linux kernel, the following vulnerability has been resolved: shmem: fix recovery on rename failures maple_tree insertions can fail if we are seriously short on memory; simple_offset_rename() does not recover well if it runs into that. The same goes for simple_offset_rename_exchange(). Moreover, shmem_whiteout() expects that if it succeeds, the caller will progress to d_move(), i.e. that shmem_rename2() won't fail past the successful call of shmem_whiteout(). Not hard to fix, fortunately - mtree_store() can't fail if the index we are trying to store into is already present in the tree as a singleton. For simple_offset_rename_exchange() that's enough - we just need to be careful about the order of operations. For simple_offset_rename() solution is to preinsert the target into the tree for new_dir; the rest can be done without any potentially failing operations. That preinsertion has to be done in shmem_rename2() rather than in simple_offset_rename() itself - otherwise we'd need to deal with the possibility of failure after successful shmem_whiteout().

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/4b0fe71fb3965d0db…
	https://git.kernel.org/stable/c/4642686699a46718d…
	https://git.kernel.org/stable/c/e1b4c6a58304fd490…

Impacted products

Vendor

Product

Version

Linux

Affected: a2e459555c5f9da3e619b7e47a63f98574dc75f1 , < 4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113 (git)
Affected: a2e459555c5f9da3e619b7e47a63f98574dc75f1 , < 4642686699a46718d7f2fb5acd1e9d866a9d9cca (git)
Affected: a2e459555c5f9da3e619b7e47a63f98574dc75f1 , < e1b4c6a58304fd490124cc2b454d80edc786665c (git)

Linux

Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/libfs.c",
            "include/linux/fs.h",
            "mm/shmem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113",
              "status": "affected",
              "version": "a2e459555c5f9da3e619b7e47a63f98574dc75f1",
              "versionType": "git"
            },
            {
              "lessThan": "4642686699a46718d7f2fb5acd1e9d866a9d9cca",
              "status": "affected",
              "version": "a2e459555c5f9da3e619b7e47a63f98574dc75f1",
              "versionType": "git"
            },
            {
              "lessThan": "e1b4c6a58304fd490124cc2b454d80edc786665c",
              "status": "affected",
              "version": "a2e459555c5f9da3e619b7e47a63f98574dc75f1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/libfs.c",
            "include/linux/fs.h",
            "mm/shmem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc2",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nshmem: fix recovery on rename failures\n\nmaple_tree insertions can fail if we are seriously short on memory;\nsimple_offset_rename() does not recover well if it runs into that.\nThe same goes for simple_offset_rename_exchange().\n\nMoreover, shmem_whiteout() expects that if it succeeds, the caller will\nprogress to d_move(), i.e. that shmem_rename2() won\u0027t fail past the\nsuccessful call of shmem_whiteout().\n\nNot hard to fix, fortunately - mtree_store() can\u0027t fail if the index we\nare trying to store into is already present in the tree as a singleton.\n\nFor simple_offset_rename_exchange() that\u0027s enough - we just need to be\ncareful about the order of operations.\n\nFor simple_offset_rename() solution is to preinsert the target into the\ntree for new_dir; the rest can be done without any potentially failing\noperations.\n\nThat preinsertion has to be done in shmem_rename2() rather than in\nsimple_offset_rename() itself - otherwise we\u0027d need to deal with the\npossibility of failure after successful shmem_whiteout()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:31:26.089Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113"
        },
        {
          "url": "https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c"
        }
      ],
      "title": "shmem: fix recovery on rename failures",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71072",
    "datePublished": "2026-01-13T15:31:26.089Z",
    "dateReserved": "2026-01-13T15:30:19.647Z",
    "dateUpdated": "2026-01-13T15:31:26.089Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71072\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:06.633\",\"lastModified\":\"2026-01-13T16:16:06.633\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nshmem: fix recovery on rename failures\\n\\nmaple_tree insertions can fail if we are seriously short on memory;\\nsimple_offset_rename() does not recover well if it runs into that.\\nThe same goes for simple_offset_rename_exchange().\\n\\nMoreover, shmem_whiteout() expects that if it succeeds, the caller will\\nprogress to d_move(), i.e. that shmem_rename2() won\u0027t fail past the\\nsuccessful call of shmem_whiteout().\\n\\nNot hard to fix, fortunately - mtree_store() can\u0027t fail if the index we\\nare trying to store into is already present in the tree as a singleton.\\n\\nFor simple_offset_rename_exchange() that\u0027s enough - we just need to be\\ncareful about the order of operations.\\n\\nFor simple_offset_rename() solution is to preinsert the target into the\\ntree for new_dir; the rest can be done without any potentially failing\\noperations.\\n\\nThat preinsertion has to be done in shmem_rename2() rather than in\\nsimple_offset_rename() itself - otherwise we\u0027d need to deal with the\\npossibility of failure after successful shmem_whiteout().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-2J2J-FMXQ-39XM

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31

Details

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

shmem: fix recovery on rename failures

maple_tree insertions can fail if we are seriously short on memory; simple_offset_rename() does not recover well if it runs into that. The same goes for simple_offset_rename_exchange().

Moreover, shmem_whiteout() expects that if it succeeds, the caller will progress to d_move(), i.e. that shmem_rename2() won't fail past the successful call of shmem_whiteout().

Not hard to fix, fortunately - mtree_store() can't fail if the index we are trying to store into is already present in the tree as a singleton.

For simple_offset_rename_exchange() that's enough - we just need to be careful about the order of operations.

For simple_offset_rename() solution is to preinsert the target into the tree for new_dir; the rest can be done without any potentially failing operations.

That preinsertion has to be done in shmem_rename2() rather than in simple_offset_rename() itself - otherwise we'd need to deal with the possibility of failure after successful shmem_whiteout().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-71072"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nshmem: fix recovery on rename failures\n\nmaple_tree insertions can fail if we are seriously short on memory;\nsimple_offset_rename() does not recover well if it runs into that.\nThe same goes for simple_offset_rename_exchange().\n\nMoreover, shmem_whiteout() expects that if it succeeds, the caller will\nprogress to d_move(), i.e. that shmem_rename2() won\u0027t fail past the\nsuccessful call of shmem_whiteout().\n\nNot hard to fix, fortunately - mtree_store() can\u0027t fail if the index we\nare trying to store into is already present in the tree as a singleton.\n\nFor simple_offset_rename_exchange() that\u0027s enough - we just need to be\ncareful about the order of operations.\n\nFor simple_offset_rename() solution is to preinsert the target into the\ntree for new_dir; the rest can be done without any potentially failing\noperations.\n\nThat preinsertion has to be done in shmem_rename2() rather than in\nsimple_offset_rename() itself - otherwise we\u0027d need to deal with the\npossibility of failure after successful shmem_whiteout().",
  "id": "GHSA-2j2j-fmxq-39xm",
  "modified": "2026-01-13T18:31:05Z",
  "published": "2026-01-13T18:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71072"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

FKIE_CVE-2025-71072

Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-01-13 16:16

Severity ?

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nshmem: fix recovery on rename failures\n\nmaple_tree insertions can fail if we are seriously short on memory;\nsimple_offset_rename() does not recover well if it runs into that.\nThe same goes for simple_offset_rename_exchange().\n\nMoreover, shmem_whiteout() expects that if it succeeds, the caller will\nprogress to d_move(), i.e. that shmem_rename2() won\u0027t fail past the\nsuccessful call of shmem_whiteout().\n\nNot hard to fix, fortunately - mtree_store() can\u0027t fail if the index we\nare trying to store into is already present in the tree as a singleton.\n\nFor simple_offset_rename_exchange() that\u0027s enough - we just need to be\ncareful about the order of operations.\n\nFor simple_offset_rename() solution is to preinsert the target into the\ntree for new_dir; the rest can be done without any potentially failing\noperations.\n\nThat preinsertion has to be done in shmem_rename2() rather than in\nsimple_offset_rename() itself - otherwise we\u0027d need to deal with the\npossibility of failure after successful shmem_whiteout()."
    }
  ],
  "id": "CVE-2025-71072",
  "lastModified": "2026-01-13T16:16:06.633",
  "metrics": {},
  "published": "2026-01-13T16:16:06.633",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

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

CVE-2025-71072 (GCVE-0-2025-71072)

GHSA-2J2J-FMXQ-39XM

FKIE_CVE-2025-71072

Tags

Sightings

Nomenclature