Vulnerability-Lookup

GHSA-384V-9GX5-RMX4

Vulnerability from github – Published: 2024-03-29 12:30 – Updated: 2024-08-01 15:31

Details

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)

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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52629"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-29T10:15:09Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsh: push-switch: Reorder cleanup operations to avoid use-after-free bug\n\nThe original code puts flush_work() before timer_shutdown_sync()\nin switch_drv_remove(). 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.",
  "id": "GHSA-384v-9gx5-rmx4",
  "modified": "2024-08-01T15:31:35Z",
  "published": "2024-03-29T12:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52629"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4de"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2024-03-29 09:13 – Updated: 2026-05-11 19:30

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 · CISA-ADP (v2.0.3)

Decision recorded 2024-04-01 17:41 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/610dbd8ac271aa360…
https://git.kernel.org/stable/c/246f80a0b17f8f582…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: 9f5e8eee5cfe1328660c71812d87c2a67bda389f , < 610dbd8ac271aa36080aac50b928d700ee3fe4de (git) Affected: 9f5e8eee5cfe1328660c71812d87c2a67bda389f , < 246f80a0b17f8f582b2c0996db02998239057c65 (git)
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)
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:-:::::::*

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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.

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