cve-2021-47483
Vulnerability from cvelistv5
Published
2024-05-22 08:19
Modified
2024-12-19 07:43
Severity ?
EPSS score ?
0.05% (0.11146)
Summary
In the Linux kernel, the following vulnerability has been resolved: regmap: Fix possible double-free in regcache_rbtree_exit() In regcache_rbtree_insert_to_block(), when 'present' realloc failed, the 'blk' which is supposed to assign to 'rbnode->block' will be freed, so 'rbnode->block' points a freed memory, in the error handling path of regcache_rbtree_init(), 'rbnode->block' will be freed again in regcache_rbtree_exit(), KASAN will report double-free as follows: BUG: KASAN: double-free or invalid-free in kfree+0xce/0x390 Call Trace: 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 really_probe+0x285/0xc30 To fix this, moving up the assignment of rbnode->block to immediately after the reallocation has succeeded so that the data structure stays valid even if the second reallocation fails.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2Patch
Impacted products
Vendor Product Version
Linux Linux Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
Version: 3f4ff561bc88b074d5e868dde4012d89cbb06c87
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   Linux Linux Version: 3.12
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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 liberación 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 liberará, por lo que 'rbnode->block' apunta a una memoria liberada, en la ruta de manejo de errores de regcache_rbtree_init(), 'rbnode->block' se liberará nuevamente en regcache_rbtree_exit(), KASAN informará la doble liberación de la siguiente manera : ERROR: KASAN: doble libre o no válido 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 asignación de rbnode->block inmediatamente después de que la reasignación se haya realizado correctamente para que la estructura de datos permanezca válido incluso si la segunda reasignación falla.\"}],\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-415\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.12\",\"versionEndExcluding\":\"4.4.291\",\"matchCriteriaId\":\"4C4E1787-4FA7-4459-8C03-4F7E0506D418\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.5\",\"versionEndExcluding\":\"4.9.289\",\"matchCriteriaId\":\"3C36E651-9DAF-456A-BF26-911C6969C788\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.254\",\"matchCriteriaId\":\"E5B52B53-46CA-466D-A89D-BBB72ED073BF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.215\",\"matchCriteriaId\":\"254BE7BF-D39E-4928-A0AD-B6BBBCACF09C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.157\",\"matchCriteriaId\":\"8FBCA21B-424F-4B7F-A9A8-FDD64FE6BD3B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.77\",\"matchCriteriaId\":\"26EB7ED9-AEA3-4829-8B5E-08571262F72A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.14.16\",\"matchCriteriaId\":\"2681B950-4548-4649-A9E1-4124B59FC09C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"60134C3A-06E4-48C1-B04F-2903732A4E56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"0460DA88-8FE1-46A2-9DDA-1F1ABA552E71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"AF55383D-4DF2-45DC-93F7-571F4F978EAB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"EBD45831-4B79-42BC-ABC0-86870F0DEA89\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"948A6B8D-1B72-4945-8680-354E53BE1C80\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/50cc1462a668dc62949a1127388bc3af785ce047\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/55e6d8037805b3400096d621091dfbf713f97e83\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/758ced2c3878ff789801e6fee808e185c5cf08d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/36e911a16b377bde0ad91a8c679069d0d310b1a6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d6109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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\": \"2024-12-19T07:43:16.915Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47483\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:43:16.915Z\", \"dateReserved\": \"2024-05-22T06:20:56.200Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T08:19:34.852Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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