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CVE-2022-49890 (GCVE-0-2022-49890)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:08
VLAI
Title
capabilities: fix potential memleak on error path from vfs_getxattr_alloc()
Summary
In the Linux kernel, the following vulnerability has been resolved: capabilities: fix potential memleak on error path from vfs_getxattr_alloc() In cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to complete the memory allocation of tmpbuf, if we have completed the memory allocation of tmpbuf, but failed to call handler->get(...), there will be a memleak in below logic: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ alloc for tmpbuf */ |-- value = krealloc(*xattr_value, error + 1, flags) | /* ^^^ alloc memory */ |-- error = handler->get(handler, ...) | /* error! */ |-- *xattr_value = value | /* xattr_value is &tmpbuf (memory leak!) */ So we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it. [PM: subject line and backtrace tweaks]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 16:08 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85 (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 90577bcc01c4188416a47269f8433f70502abe98 (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 0c3e6288da650d1ec911a259c77bc2d88e498603 (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < cdf01c807e974048c43c7fd3ca574f6086a57906 (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 2de8eec8afb75792440b8900a01d52b8f6742fd1 (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 7480aeff0093d8c54377553ec6b31110bea37b4d (git)
Affected: 8db6c34f1dbc8e06aa016a9b829b06902c3e1340 , < 8cf0a1bc12870d148ae830a4ba88cfdf0e879cee (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 4.14.299 , ≤ 4.14.* (semver)
Unaffected: 4.19.265 , ≤ 4.19.* (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.78 , ≤ 5.15.* (semver)
Unaffected: 6.0.8 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:29:37+00:00",
      "cve": "CVE-2022-49890",
      "id": "CVE-2022-49890",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "58",
      "product_status:known_not_affected": "184",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: capabilities: fix potential memleak on error path from vfs_getxattr_alloc()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49890.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T12:44:00Z",
      "cve": "CVE-2022-49890",
      "id": "CVE-2022-49890",
      "initial_release_date": "2025-05-12T01:06:44Z",
      "product_status:known_affected": "408",
      "product_status:known_not_affected": "315",
      "product_status:recommended": "234",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49890",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49890.json",
      "version": "43"
    },
    "vulnrichment": {
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completed\\nthe memory allocation of tmpbuf, but failed to call handler-\u003eget(...),\\nthere will be a memleak in below logic:\\n\\n  |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...)\\n    |           /* ^^^ alloc for tmpbuf */\\n    |-- value = krealloc(*xattr_value, error + 1, flags)\\n    |           /* ^^^ alloc memory */\\n    |-- error = handler-\u003eget(handler, ...)\\n    |           /* error! */\\n    |-- *xattr_value = value\\n    |           /* xattr_value is \u0026tmpbuf (memory leak!) */\\n\\nSo we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it.\\n\\n[PM: subject line and backtrace tweaks]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.299\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.265\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.224\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.154\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.78\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.8\", \"versionStartIncluding\": \"4.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"4.14\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:47:53.416Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49890\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T16:08:36.059Z\", \"dateReserved\": \"2025-05-01T14:05:17.242Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-05-01T14:10:34.481Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.