CVE-2021-47549 (GCVE-0-2021-47549)
Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56
VLAI
EPSS
VEX
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.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-10 18:51 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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) |
guessed | |
| 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) |
guessed |
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"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.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sata_fsl: corrige UAF en sata_fsl_port_stop cuando rmmod sata_fsl Cuando se ejecuta el comando `rmmod sata_fsl.ko` en el PPC64 GNU/Linux se reporta un error: ====== ==================================================== ========== ERROR: No se puede manejar el acceso a los datos del kernel al leer en 0x80000800805b502c Ups: Acceso al kernel del \\u00e1rea defectuosa, firma: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034 ] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Seguimiento de llamadas: .free_irq+0x1c/0x4e0 (no confiable) .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 ======= ==================================================== ========= La activaci\\u00f3n del ERROR se muestra en la siguiente pila: driver_detach device_release_driver_internal __device_release_driver drv-\u0026gt;remove(dev) --\u0026gt; platform_drv_remove/platform_remove drv-\u0026gt;remove(dev) --\u0026gt; sata_fsl_remove iounmap( host_priv-\u0026gt;hcr_base); \u0026lt;---- desasignar kfree(host_priv); \u0026lt;---- free devres_release_all release_nodes dr-\u0026gt;node.release(dev, dr-\u0026gt;data) --\u0026gt; ata_host_stop ap-\u0026gt;ops-\u0026gt;port_stop(ap) --\u0026gt; sata_fsl_port_stop ioread32(hcr_base + HCONTROL) \u0026lt;--- - UAF host-\u0026gt;ops-\u0026gt;host_stop(host) Las funciones iounmap(host_priv-\u0026gt;hcr_base) y kfree(host_priv) no deben ejecutarse en drv-\u0026gt;remove. Estas funciones deben ejecutarse en host_stop despu\\u00e9s de port_stop. Por lo tanto, movemos estas funciones a la nueva funci\\u00f3n sata_fsl_host_stop y vinculamos la nueva funci\\u00f3n a host_stop.\"}]",
"id": "CVE-2021-47549",
"lastModified": "2025-01-07T17:04:16.397",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 5.9}]}",
"published": "2024-05-24T15:15:19.773",
"references": "[{\"url\": \"https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-47549\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:19.773\",\"lastModified\":\"2026-06-17T04:17:44.597\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sata_fsl: corrige UAF en sata_fsl_port_stop cuando rmmod sata_fsl Cuando se ejecuta el comando `rmmod sata_fsl.ko` en el PPC64 GNU/Linux se reporta un error: ====== ==================================================== ========== ERROR: No se puede manejar el acceso a los datos del kernel al leer en 0x80000800805b502c Ups: Acceso al kernel del \u00e1rea defectuosa, firma: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034 ] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Seguimiento de llamadas: .free_irq+0x1c/0x4e0 (no confiable) .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 ======= ==================================================== ========= La activaci\u00f3n del ERROR se muestra en la siguiente pila: driver_detach device_release_driver_internal __device_release_driver drv-\u0026gt;remove(dev) --\u0026gt; platform_drv_remove/platform_remove drv-\u0026gt;remove(dev) --\u0026gt; sata_fsl_remove iounmap( host_priv-\u0026gt;hcr_base); \u0026lt;---- desasignar kfree(host_priv); \u0026lt;---- free devres_release_all release_nodes dr-\u0026gt;node.release(dev, dr-\u0026gt;data) --\u0026gt; ata_host_stop ap-\u0026gt;ops-\u0026gt;port_stop(ap) --\u0026gt; sata_fsl_port_stop ioread32(hcr_base + HCONTROL) \u0026lt;--- - UAF host-\u0026gt;ops-\u0026gt;host_stop(host) Las funciones iounmap(host_priv-\u0026gt;hcr_base) y kfree(host_priv) no deben ejecutarse en drv-\u0026gt;remove. Estas funciones deben ejecutarse en host_stop despu\u00e9s de port_stop. Por lo tanto, movemos estas funciones a la nueva funci\u00f3n sata_fsl_host_stop y vinculamos la nueva funci\u00f3n a host_stop.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/ata/sata_fsl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"cdcd80292106df5cda325426e96495503e41f947\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"91ba94d3f7afca195b224f77a72044fbde1389ce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"0769449b0a5eabc3545337217ae690e46673e73a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"77393806c76b6b44f1c44bd957788c8bd9152c45\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"4a46b2f5dce02539e88a300800812bd24a45e097\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"adf098e2a8a1e1fc075d6a5ba2edd13cf7189082\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"faf0b2e5afe7dae072d2715763c7f992b612b628\",\"lessThan\":\"6c8ad7e8cf29eb55836e7a0215f967746ab2b504\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/ata/sata_fsl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.24\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.24\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.4.294\",\"lessThanOrEqual\":\"4.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.292\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.257\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.220\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.164\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.84\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.7\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.16\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-10T18:51:57.611443Z\",\"id\":\"CVE-2021-47549\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2025-11-21T14:07:11+00:00",
"cve": "CVE-2021-47549",
"id": "CVE-2021-47549",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "198",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47549.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T02:37:11Z",
"cve": "CVE-2021-47549",
"id": "CVE-2021-47549",
"initial_release_date": "2024-05-28T15:29:28Z",
"product_status:known_affected": "269",
"product_status:known_not_affected": "202",
"product_status:recommended": "627",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-47549",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47549.json",
"version": "65"
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==================================================================\\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\": \"2026-05-11T13:56:46.684Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-47549\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:56:46.684Z\", \"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": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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