CVE-2021-47549 (GCVE-0-2021-47549)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2025-05-04 07:13
VLAI?
Title
sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
Summary
In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux, a bug is reported: ================================================================== BUG: Unable to handle kernel data access on read at 0x80000800805b502c Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Call Trace: .free_irq+0x1c/0x4e0 (unreliable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+0xfc/0x1f0 system_call_common+0xf8/0x200 ================================================================== The triggering of the BUG is shown in the following stack: driver_detach device_release_driver_internal __device_release_driver drv->remove(dev) --> platform_drv_remove/platform_remove drv->remove(dev) --> sata_fsl_remove iounmap(host_priv->hcr_base); <---- unmap kfree(host_priv); <---- free devres_release_all release_nodes dr->node.release(dev, dr->data) --> ata_host_stop ap->ops->port_stop(ap) --> sata_fsl_port_stop ioread32(hcr_base + HCONTROL) <---- UAF host->ops->host_stop(host) The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should not be executed in drv->remove. These functions should be executed in host_stop after port_stop. Therefore, we move these functions to the new function sata_fsl_host_stop and bind the new function to host_stop.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < cdcd80292106df5cda325426e96495503e41f947 (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 91ba94d3f7afca195b224f77a72044fbde1389ce (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 0769449b0a5eabc3545337217ae690e46673e73a (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 77393806c76b6b44f1c44bd957788c8bd9152c45 (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 4a46b2f5dce02539e88a300800812bd24a45e097 (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 (git)
Affected: faf0b2e5afe7dae072d2715763c7f992b612b628 , < 6c8ad7e8cf29eb55836e7a0215f967746ab2b504 (git)
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    Linux Linux Affected: 2.6.24
Unaffected: 0 , < 2.6.24 (semver)
Unaffected: 4.4.294 , ≤ 4.4.* (semver)
Unaffected: 4.9.292 , ≤ 4.9.* (semver)
Unaffected: 4.14.257 , ≤ 4.14.* (semver)
Unaffected: 4.19.220 , ≤ 4.19.* (semver)
Unaffected: 5.4.164 , ≤ 5.4.* (semver)
Unaffected: 5.10.84 , ≤ 5.10.* (semver)
Unaffected: 5.15.7 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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\"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.257\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.220\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.164\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.84\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/ata/sata_fsl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947\"}, {\"url\": \"https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce\"}, {\"url\": \"https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1\"}, {\"url\": \"https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a\"}, {\"url\": \"https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45\"}, {\"url\": \"https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097\"}, {\"url\": \"https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082\"}, {\"url\": \"https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl\\n\\nWhen the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux,\\na bug is reported:\\n ==================================================================\\n BUG: Unable to handle kernel data access on read at 0x80000800805b502c\\n Oops: Kernel access of bad area, sig: 11 [#1]\\n NIP [c0000000000388a4] .ioread32+0x4/0x20\\n LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl]\\n Call Trace:\\n  .free_irq+0x1c/0x4e0 (unreliable)\\n  .ata_host_stop+0x74/0xd0 [libata]\\n  .release_nodes+0x330/0x3f0\\n  .device_release_driver_internal+0x178/0x2c0\\n  .driver_detach+0x64/0xd0\\n  .bus_remove_driver+0x70/0xf0\\n  .driver_unregister+0x38/0x80\\n  .platform_driver_unregister+0x14/0x30\\n  .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl]\\n  .__se_sys_delete_module+0x1ec/0x2d0\\n  .system_call_exception+0xfc/0x1f0\\n  system_call_common+0xf8/0x200\\n ==================================================================\\n\\nThe triggering of the BUG is shown in the following stack:\\n\\ndriver_detach\\n  device_release_driver_internal\\n    __device_release_driver\\n      drv-\u003eremove(dev) --\u003e platform_drv_remove/platform_remove\\n        drv-\u003eremove(dev) --\u003e sata_fsl_remove\\n          iounmap(host_priv-\u003ehcr_base);\\t\\t\\t\u003c---- unmap\\n          kfree(host_priv);                             \u003c---- free\\n      devres_release_all\\n        release_nodes\\n          dr-\u003enode.release(dev, dr-\u003edata) --\u003e ata_host_stop\\n            ap-\u003eops-\u003eport_stop(ap) --\u003e sata_fsl_port_stop\\n                ioread32(hcr_base + HCONTROL)           \u003c---- UAF\\n            host-\u003eops-\u003ehost_stop(host)\\n\\nThe iounmap(host_priv-\u003ehcr_base) and kfree(host_priv) functions should\\nnot be executed in drv-\u003eremove. These functions should be executed in\\nhost_stop after port_stop. Therefore, we move these functions to the\\nnew function sata_fsl_host_stop and bind the new function to host_stop.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.294\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.292\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.257\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.220\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.164\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.84\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.7\", \"versionStartIncluding\": \"2.6.24\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"2.6.24\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:13:21.648Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47549\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:13:21.648Z\", \"dateReserved\": \"2024-05-24T15:02:54.831Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:09:53.292Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.