CVE-2022-48872 (GCVE-0-2022-48872)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-05-11 18:48
VLAI
Title
misc: fastrpc: Fix use-after-free race condition for maps
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix use-after-free race condition for maps It is possible that in between calling fastrpc_map_get() until map->fl->lock is taken in fastrpc_free_map(), another thread can call fastrpc_map_lookup() and get a reference to a map that is about to be deleted. Rewrite fastrpc_map_get() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted. Fixes this warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate ... Call trace: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_syscall
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 556dfdb226ce1e5231d8836159b23f8bb0395bf4 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < b171d0d2cf1b8387c72c8d325c5d5746fa271e39 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 61a0890cb95afec5c8a2f4a879de2b6220984ef1 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 079c78c68714f7d8d58e66c477b0243b31806907 (git)
Affected: c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 , < 96b328d119eca7563c1edcc4e1039a62e6370ecb (git)
Create a notification for this product.
Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.230 , ≤ 5.4.* (semver)
Unaffected: 5.10.165 , ≤ 5.10.* (semver)
Unaffected: 5.15.90 , ≤ 5.15.* (semver)
Unaffected: 6.1.8 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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Rastreo de llamadas: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_sy 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-02-02T10:58:00+00:00",
      "cve": "CVE-2022-48872",
      "id": "CVE-2022-48872",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: misc: fastrpc: Fix use-after-free race condition for maps",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48872.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-06-06T05:33:15Z",
      "cve": "CVE-2022-48872",
      "id": "CVE-2022-48872",
      "initial_release_date": "2024-08-22T03:29:37Z",
      "product_status:known_affected": "310",
      "product_status:known_not_affected": "113",
      "product_status:recommended": "528",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48872",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48872.json",
      "version": "50"
    },
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      "cveMetadata": "{\"cveId\": \"CVE-2022-48872\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2024-07-16T11:38:08.921Z\", \"datePublished\": \"2024-08-21T06:10:02.954Z\", \"dateUpdated\": \"2024-08-21T06:10:02.954Z\"}",
      "dataType": "CVE_RECORD",
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  }
}



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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.