CVE-2023-52629 (GCVE-0-2023-52629)

Vulnerability from cvelistv5 – Published: 2024-03-29 09:13 – Updated: 2026-05-11 19:30
VLAI
Title
sh: push-switch: Reorder cleanup operations to avoid use-after-free bug
Summary
In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9f5e8eee5cfe1328660c71812d87c2a67bda389f , < 610dbd8ac271aa36080aac50b928d700ee3fe4de (git)
Affected: 9f5e8eee5cfe1328660c71812d87c2a67bda389f , < 246f80a0b17f8f582b2c0996db02998239057c65 (git)
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Linux Linux Affected: 2.6.20
Unaffected: 0 , < 2.6.20 (semver)
Unaffected: 6.5.4 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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linux linux_kernel Affected: 9f5e8eee5cfe , < 610dbd8ac271 (custom)
Affected: 9f5e8eee5cfe , < 246f80a0b17f (custom)
Affected: 2.6.20
Unaffected: 0 , < 2.6.20 (custom)
Unaffected: 6.54 , ≤ 6.6 (custom)
Unaffected: 0 , ≤ 6.6 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
 Create a notification for this product.
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Although we use flush_work() to stop\\nthe worker, it could be rescheduled in switch_timer(). As a result,\\na use-after-free bug can occur. The details are shown below:\\n\\n      (cpu 0)                    |      (cpu 1)\\nswitch_drv_remove()              |\\n flush_work()                    |\\n  ...                            |  switch_timer // timer\\n                                 |   schedule_work(\u0026psw-\u003ework)\\n timer_shutdown_sync()           |\\n ...                             |  switch_work_handler // worker\\n kfree(psw) // free              |\\n                                 |   psw-\u003estate = 0 // use\\n\\nThis patch puts timer_shutdown_sync() before flush_work() to\\nmitigate the bugs. As a result, the worker and timer will be\\nstopped safely before the deallocate operations.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:22:56.731Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52629\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:22:56.731Z\", \"dateReserved\": \"2024-03-06T09:52:12.092Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-29T09:13:45.848Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.