CVE-2022-48801 (GCVE-0-2022-48801)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:43 – Updated: 2026-08-05 08:52
VLAI
Title
iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL If we fail to copy the just created file descriptor to userland, we try to clean up by putting back 'fd' and freeing 'ib'. The code uses put_unused_fd() for the former which is wrong, as the file descriptor was already published by fd_install() which gets called internally by anon_inode_getfd(). This makes the error handling code leaving a half cleaned up file descriptor table around and a partially destructed 'file' object, allowing userland to play use-after-free tricks on us, by abusing the still usable fd and making the code operate on a dangling 'file->private_data' pointer. Instead of leaving the kernel in a partially corrupted state, don't attempt to explicitly clean up and leave this to the process exit path that'll release any still valid fds, including the one created by the previous call to anon_inode_getfd(). Simply return -EFAULT to indicate the error.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 , < b7f54894aa7517d2b6c797a499b9f491e9db9083 (git)
Affected: f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 , < 202071d2518537866d291aa7cf26af54e674f4d4 (git)
Affected: f73f7f4da581875f9b1f2fb8ebd1ab15ed634488 , < c72ea20503610a4a7ba26c769357d31602769c01 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.24 , ≤ 5.15.* (semver)
Unaffected: 5.16.10 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T23:00:54+00:00",
      "cve": "CVE-2022-48801",
      "id": "CVE-2022-48801",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48801.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-05T01:17:18Z",
      "cve": "CVE-2022-48801",
      "id": "CVE-2022-48801",
      "initial_release_date": "2024-07-17T04:19:13Z",
      "product_status:known_affected": "295",
      "product_status:known_not_affected": "205",
      "product_status:recommended": "426",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48801",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48801.json",
      "version": "49"
    },
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The code uses\\nput_unused_fd() for the former which is wrong, as the file descriptor\\nwas already published by fd_install() which gets called internally by\\nanon_inode_getfd().\\n\\nThis makes the error handling code leaving a half cleaned up file\\ndescriptor table around and a partially destructed \u0027file\u0027 object,\\nallowing userland to play use-after-free tricks on us, by abusing\\nthe still usable fd and making the code operate on a dangling\\n\u0027file-\u003eprivate_data\u0027 pointer.\\n\\nInstead of leaving the kernel in a partially corrupted state, don\u0027t\\nattempt to explicitly clean up and leave this to the process exit\\npath that\u0027ll release any still valid fds, including the one created\\nby the previous call to anon_inode_getfd(). Simply return -EFAULT to\\nindicate the error.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.24\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.10\", \"versionStartIncluding\": \"5.13\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17\", \"versionStartIncluding\": \"5.13\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:52:26.711Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-48801\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:52:26.711Z\", \"dateReserved\": \"2024-07-16T11:38:08.895Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-16T11:43:54.253Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.