{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47549", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47549", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-24T15:09:53.292Z", "updatedAt": "2026-05-11T13:56:46.684Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "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:\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->remove(dev) --> platform_drv_remove/platform_remove\n drv->remove(dev) --> sata_fsl_remove\n iounmap(host_priv->hcr_base);\t\t\t<---- unmap\n kfree(host_priv); <---- free\n devres_release_all\n release_nodes\n dr->node.release(dev, dr->data) --> ata_host_stop\n ap->ops->port_stop(ap) --> sata_fsl_port_stop\n ioread32(hcr_base + HCONTROL) <---- UAF\n host->ops->host_stop(host)\n\nThe iounmap(host_priv->hcr_base) and kfree(host_priv) functions should\nnot be executed in drv->remove. 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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "cdcd80292106df5cda325426e96495503e41f947" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "91ba94d3f7afca195b224f77a72044fbde1389ce" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "0769449b0a5eabc3545337217ae690e46673e73a" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "77393806c76b6b44f1c44bd957788c8bd9152c45" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "4a46b2f5dce02539e88a300800812bd24a45e097" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "adf098e2a8a1e1fc075d6a5ba2edd13cf7189082" }, { "version": "faf0b2e5afe7dae072d2715763c7f992b612b628", "status": "affected", "versionType": "git", "lessThan": "6c8ad7e8cf29eb55836e7a0215f967746ab2b504" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.24", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.24" }, { "version": "4.4.294", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.4.*" }, { "version": "4.9.292", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.257", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.220", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.164", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.84", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }