GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2022-49281 (GCVE-0-2022-49281)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:56 – Updated: 2026-05-11 18:56
VLAI
Title
cifs: fix handlecache and multiuser
Summary
In the Linux kernel, the following vulnerability has been resolved: cifs: fix handlecache and multiuser In multiuser each individual user has their own tcon structure for the share and thus their own handle for a cached directory. When we umount such a share we much make sure to release the pinned down dentry for each such tcon and not just the master tcon. Otherwise we will get nasty warnings on umount that dentries are still in use: [ 3459.590047] BUG: Dentry 00000000115c6f41{i=12000000019d95,n=/} still in use\ (2) [unmount of cifs cifs] ... [ 3459.590492] Call Trace: [ 3459.590500] d_walk+0x61/0x2a0 [ 3459.590518] ? shrink_lock_dentry.part.0+0xe0/0xe0 [ 3459.590526] shrink_dcache_for_umount+0x49/0x110 [ 3459.590535] generic_shutdown_super+0x1a/0x110 [ 3459.590542] kill_anon_super+0x14/0x30 [ 3459.590549] cifs_kill_sb+0xf5/0x104 [cifs] [ 3459.590773] deactivate_locked_super+0x36/0xa0 [ 3459.590782] cleanup_mnt+0x131/0x190 [ 3459.590789] task_work_run+0x5c/0x90 [ 3459.590798] exit_to_user_mode_loop+0x151/0x160 [ 3459.590809] exit_to_user_mode_prepare+0x83/0xd0 [ 3459.590818] syscall_exit_to_user_mode+0x12/0x30 [ 3459.590828] do_syscall_64+0x48/0x90 [ 3459.590833] entry_SYSCALL_64_after_hwframe+0x44/0xae
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9 , < 2fafbc198613823943c106d1ec9b516da692059f (git)
Affected: 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9 , < ffa631c4bff59dde59b598011f570e27dfba3515 (git)
Affected: 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9 , < e71f6a3a1d5c826a30384fec587ca7503ef6bde5 (git)
Affected: 5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9 , < 47178c7722ac528ea08aa82c3ef9ffa178962d7a (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.33 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/cifsfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fafbc198613823943c106d1ec9b516da692059f",
              "status": "affected",
              "version": "5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9",
              "versionType": "git"
            },
            {
              "lessThan": "ffa631c4bff59dde59b598011f570e27dfba3515",
              "status": "affected",
              "version": "5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9",
              "versionType": "git"
            },
            {
              "lessThan": "e71f6a3a1d5c826a30384fec587ca7503ef6bde5",
              "status": "affected",
              "version": "5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9",
              "versionType": "git"
            },
            {
              "lessThan": "47178c7722ac528ea08aa82c3ef9ffa178962d7a",
              "status": "affected",
              "version": "5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/cifsfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.33",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16.19",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.2",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix handlecache and multiuser\n\nIn multiuser each individual user has their own tcon structure for the\nshare and thus their own handle for a cached directory.\nWhen we umount such a share we much make sure to release the pinned down dentry\nfor each such tcon and not just the master tcon.\n\nOtherwise we will get nasty warnings on umount that dentries are still in use:\n[ 3459.590047] BUG: Dentry 00000000115c6f41{i=12000000019d95,n=/}  still in use\\\n (2) [unmount of cifs cifs]\n...\n[ 3459.590492] Call Trace:\n[ 3459.590500]  d_walk+0x61/0x2a0\n[ 3459.590518]  ? shrink_lock_dentry.part.0+0xe0/0xe0\n[ 3459.590526]  shrink_dcache_for_umount+0x49/0x110\n[ 3459.590535]  generic_shutdown_super+0x1a/0x110\n[ 3459.590542]  kill_anon_super+0x14/0x30\n[ 3459.590549]  cifs_kill_sb+0xf5/0x104 [cifs]\n[ 3459.590773]  deactivate_locked_super+0x36/0xa0\n[ 3459.590782]  cleanup_mnt+0x131/0x190\n[ 3459.590789]  task_work_run+0x5c/0x90\n[ 3459.590798]  exit_to_user_mode_loop+0x151/0x160\n[ 3459.590809]  exit_to_user_mode_prepare+0x83/0xd0\n[ 3459.590818]  syscall_exit_to_user_mode+0x12/0x30\n[ 3459.590828]  do_syscall_64+0x48/0x90\n[ 3459.590833]  entry_SYSCALL_64_after_hwframe+0x44/0xae"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T18:56:39.572Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fafbc198613823943c106d1ec9b516da692059f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ffa631c4bff59dde59b598011f570e27dfba3515"
        },
        {
          "url": "https://git.kernel.org/stable/c/e71f6a3a1d5c826a30384fec587ca7503ef6bde5"
        },
        {
          "url": "https://git.kernel.org/stable/c/47178c7722ac528ea08aa82c3ef9ffa178962d7a"
        }
      ],
      "title": "cifs: fix handlecache and multiuser",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49281",
    "datePublished": "2025-02-26T01:56:23.201Z",
    "dateReserved": "2025-02-26T01:49:39.298Z",
    "dateUpdated": "2026-05-11T18:56:39.572Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49281",
      "date": "2026-09-16",
      "epss": "0.00263",
      "percentile": "0.18331"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49281\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:04.967\",\"lastModified\":\"2026-06-17T05:17:35.367\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncifs: fix handlecache and multiuser\\n\\nIn multiuser each individual user has their own tcon structure for the\\nshare and thus their own handle for a cached directory.\\nWhen we umount such a share we much make sure to release the pinned down dentry\\nfor each such tcon and not just the master tcon.\\n\\nOtherwise we will get nasty warnings on umount that dentries are still in use:\\n[ 3459.590047] BUG: Dentry 00000000115c6f41{i=12000000019d95,n=/}  still in use\\\\\\n (2) [unmount of cifs cifs]\\n...\\n[ 3459.590492] Call Trace:\\n[ 3459.590500]  d_walk+0x61/0x2a0\\n[ 3459.590518]  ? shrink_lock_dentry.part.0+0xe0/0xe0\\n[ 3459.590526]  shrink_dcache_for_umount+0x49/0x110\\n[ 3459.590535]  generic_shutdown_super+0x1a/0x110\\n[ 3459.590542]  kill_anon_super+0x14/0x30\\n[ 3459.590549]  cifs_kill_sb+0xf5/0x104 [cifs]\\n[ 3459.590773]  deactivate_locked_super+0x36/0xa0\\n[ 3459.590782]  cleanup_mnt+0x131/0x190\\n[ 3459.590789]  task_work_run+0x5c/0x90\\n[ 3459.590798]  exit_to_user_mode_loop+0x151/0x160\\n[ 3459.590809]  exit_to_user_mode_prepare+0x83/0xd0\\n[ 3459.590818]  syscall_exit_to_user_mode+0x12/0x30\\n[ 3459.590828]  do_syscall_64+0x48/0x90\\n[ 3459.590833]  entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: fix handlecache y multiuser En multiuser, cada usuario individual tiene su propia estructura tcon para el recurso compartido y, por lo tanto, su propio identificador para un directorio en cach\u00e9. Cuando desmontamos un recurso compartido de este tipo, debemos asegurarnos de liberar la entrada dentry fijada para cada uno de esos tcon y no solo el tcon maestro. De lo contrario, recibiremos advertencias desagradables al desmontar que indican que las dentry a\u00fan est\u00e1n en uso: [ 3459.590047] ERROR: Dentry 00000000115c6f41{i=12000000019d95,n=/} a\u00fan en uso\\\\ (2) [desmontaje de cifs cifs] ... [ 3459.590492] Seguimiento de llamadas: [ 3459.590500] d_walk+0x61/0x2a0 [ 3459.590518] ? shrink_lock_dentry.part.0+0xe0/0xe0 [ 3459.590526] shrink_dcache_for_umount+0x49/0x110 [ 3459.590535] generic_shutdown_super+0x1a/0x110 [ 3459.590542] kill_anon_super+0x14/0x30 [ 3459.590549] cifs_kill_sb+0xf5/0x104 [cifs] [ 3459.590773] deactivate_locked_super+0x36/0xa0 [ 3459.590782] cleanup_mnt+0x131/0x190 [ 3459.590789] task_work_run+0x5c/0x90 [ 3459.590798] exit_to_user_mode_loop+0x151/0x160 [ 3459.590809] exit_to_user_mode_prepare+0x83/0xd0 [ 3459.590818] syscall_exit_to_user_mode+0x12/0x30 [ 3459.590828] do_syscall_64+0x48/0x90 [ 3459.590833] entry_SYSCALL_64_after_hwframe+0x44/0xae\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/cifs/cifsfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9\",\"lessThan\":\"2fafbc198613823943c106d1ec9b516da692059f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9\",\"lessThan\":\"ffa631c4bff59dde59b598011f570e27dfba3515\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9\",\"lessThan\":\"e71f6a3a1d5c826a30384fec587ca7503ef6bde5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e9c89d43fa6f5d458d4d0f9e22a67cc001c8da9\",\"lessThan\":\"47178c7722ac528ea08aa82c3ef9ffa178962d7a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/cifs/cifsfs.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.33\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.16.19\",\"lessThanOrEqual\":\"5.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.17.2\",\"lessThanOrEqual\":\"5.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.15.33\",\"matchCriteriaId\":\"0B4D5502-DA34-43DA-93D1-158E3047C2C7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.19\",\"matchCriteriaId\":\"20C43679-0439-405A-B97F-685BEE50613B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.2\",\"matchCriteriaId\":\"210C679C-CF84-44A3-8939-E629C87E54BF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2fafbc198613823943c106d1ec9b516da692059f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/47178c7722ac528ea08aa82c3ef9ffa178962d7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e71f6a3a1d5c826a30384fec587ca7503ef6bde5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ffa631c4bff59dde59b598011f570e27dfba3515\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:03:11+00:00",
      "cve": "CVE-2022-49281",
      "id": "CVE-2022-49281",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "332",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "98",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cifs: fix handlecache and multiuser",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49281.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-05T00:56:43Z",
      "cve": "CVE-2022-49281",
      "id": "CVE-2022-49281",
      "initial_release_date": "2025-02-27T03:09:29Z",
      "product_status:known_affected": "360",
      "product_status:known_not_affected": "285",
      "product_status:recommended": "341",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49281",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49281.json",
      "version": "54"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.