{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47483", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-22T06:20:56.200Z", "datePublished": "2024-05-22T08:19:34.852Z", "dateUpdated": "2024-11-04T12:06:48.365Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:06:48.365Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: Fix possible double-free in regcache_rbtree_exit()\n\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\n\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\n slab_free_freelist_hook+0x10d/0x240\n kfree+0xce/0x390\n regcache_rbtree_exit+0x15d/0x1a0\n regcache_rbtree_init+0x224/0x2c0\n regcache_init+0x88d/0x1310\n __regmap_init+0x3151/0x4a80\n __devm_regmap_init+0x7d/0x100\n madera_spi_probe+0x10f/0x333 [madera_spi]\n spi_probe+0x183/0x210\n really_probe+0x285/0xc30\n\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/regmap/regcache-rbtree.c"], "versions": [{"version": "3f4ff561bc88", "lessThan": "e72dce9afbdb", "status": "affected", "versionType": "git"}, {"version": "3f4ff561bc88", "lessThan": "fc081477b47d", 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"https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2"}, {"url": "https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6"}, {"url": "https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091"}, {"url": "https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f"}, {"url": "https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6"}, {"url": "https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047"}, {"url": "https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83"}], "x_generator": {"engine": "bippy-c8e10e5f6187"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: Fix possible double-free in regcache_rbtree_exit()\n\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\n\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\n slab_free_freelist_hook+0x10d/0x240\n kfree+0xce/0x390\n regcache_rbtree_exit+0x15d/0x1a0\n regcache_rbtree_init+0x224/0x2c0\n regcache_init+0x88d/0x1310\n __regmap_init+0x3151/0x4a80\n __devm_regmap_init+0x7d/0x100\n madera_spi_probe+0x10f/0x333 [madera_spi]\n spi_probe+0x183/0x210\n really_probe+0x285/0xc30\n\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:42:10.719Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47483", "state": "PUBLISHED", "dateUpdated": "2024-11-04T11:42:10.719Z", "dateReserved": "2024-05-22T06:20:56.200Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-22T08:19:34.852Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: Fix possible double-free in regcache_rbtree_exit()\n\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\n\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\n slab_free_freelist_hook+0x10d/0x240\n kfree+0xce/0x390\n regcache_rbtree_exit+0x15d/0x1a0\n regcache_rbtree_init+0x224/0x2c0\n regcache_init+0x88d/0x1310\n __regmap_init+0x3151/0x4a80\n __devm_regmap_init+0x7d/0x100\n madera_spi_probe+0x10f/0x333 [madera_spi]\n spi_probe+0x183/0x210\n really_probe+0x285/0xc30\n\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: regmap: corrige posible doble liberaci\u00f3n en regcache_rbtree_exit() En regcache_rbtree_insert_to_block(), cuando la realloc 'presente' fallaba, el 'blk' que se supone debe asignarse a 'rbnode->block ' se liberar\u00e1, por lo que 'rbnode->block' apunta a una memoria liberada, en la ruta de manejo de errores de regcache_rbtree_init(), 'rbnode->block' se liberar\u00e1 nuevamente en regcache_rbtree_exit(), KASAN informar\u00e1 la doble liberaci\u00f3n de la siguiente manera : ERROR: KASAN: doble libre o no v\u00e1lido en kfree+0xce/0x390 Rastreo de llamadas: slab_free_freelist_hook+0x10d/0x240 kfree+0xce/0x390 regcache_rbtree_exit+0x15d/0x1a0 regcache_rbtree_init+0x224/0x2c0 regcache_init+0x88d/ 0x1310 __regmap_init+0x3151/ 0x4a80 __devm_regmap_init+0x7d/0x100 madera_spi_probe+0x10f/0x333 [madera_spi] spi_probe+0x183/0x210 Actually_probe+0x285/0xc30 Para solucionar este problema, mueva hacia arriba la asignaci\u00f3n de rbnode->block inmediatamente despu\u00e9s de que la reasignaci\u00f3n se haya realizado correctamente para que la estructura de datos permanezca v\u00e1lido incluso si la segunda reasignaci\u00f3n falla."}], "id": "CVE-2021-47483", "lastModified": "2024-05-22T12:46:53.887", "metrics": {}, "published": "2024-05-22T09:15:10.227", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: regmap: Fix possible double-free in regcache_rbtree_exit()", "id": "2282939", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282939"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-415", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nregmap: Fix possible double-free in regcache_rbtree_exit()\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\nslab_free_freelist_hook+0x10d/0x240\nkfree+0xce/0x390\nregcache_rbtree_exit+0x15d/0x1a0\nregcache_rbtree_init+0x224/0x2c0\nregcache_init+0x88d/0x1310\n__regmap_init+0x3151/0x4a80\n__devm_regmap_init+0x7d/0x100\nmadera_spi_probe+0x10f/0x333 [madera_spi]\nspi_probe+0x183/0x210\nreally_probe+0x285/0xc30\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails."], "name": "CVE-2021-47483", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47483\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47483\nhttps://lore.kernel.org/linux-cve-announce/2024052238-CVE-2021-47483-8306@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 4.4.291, kernel 4.9.289, kernel 4.14.254, kernel 4.19.215, kernel 5.4.157, kernel 5.10.77, kernel 5.14.16, kernel 5.15"}