{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53487", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-01T11:39:39.402Z", "datePublished": "2025-10-01T11:42:54.747Z", "dateUpdated": "2026-05-11T19:45:56.368Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:45:56.368Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas_flash: allow user copy to flash block cache objects\n\nWith hardened usercopy enabled (CONFIG_HARDENED_USERCOPY=y), using the\n/proc/powerpc/rtas/firmware_update interface to prepare a system\nfirmware update yields a BUG():\n\n kernel BUG at mm/usercopy.c:102!\n Oops: Exception in kernel mode, sig: 5 [#1]\n LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\n Modules linked in:\n CPU: 0 PID: 2232 Comm: dd Not tainted 6.5.0-rc3+ #2\n Hardware name: IBM,8408-E8E POWER8E (raw) 0x4b0201 0xf000004 of:IBM,FW860.50 (SV860_146) hv:phyp pSeries\n NIP: c0000000005991d0 LR: c0000000005991cc CTR: 0000000000000000\n REGS: c0000000148c76a0 TRAP: 0700 Not tainted (6.5.0-rc3+)\n MSR: 8000000000029033 CR: 24002242 XER: 0000000c\n CFAR: c0000000001fbd34 IRQMASK: 0\n [ ... GPRs omitted ... ]\n NIP usercopy_abort+0xa0/0xb0\n LR usercopy_abort+0x9c/0xb0\n Call Trace:\n usercopy_abort+0x9c/0xb0 (unreliable)\n __check_heap_object+0x1b4/0x1d0\n __check_object_size+0x2d0/0x380\n rtas_flash_write+0xe4/0x250\n proc_reg_write+0xfc/0x160\n vfs_write+0xfc/0x4e0\n ksys_write+0x90/0x160\n system_call_exception+0x178/0x320\n system_call_common+0x160/0x2c4\n\nThe blocks of the firmware image are copied directly from user memory\nto objects allocated from flash_block_cache, so flash_block_cache must\nbe created using kmem_cache_create_usercopy() to mark it safe for user\naccess.\n\n[mpe: Trim and indent oops]" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/kernel/rtas_flash.c" ], "versions": [ { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "8f09cc15dcd91d16562400c51d24c7be0d5796fa", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "1d29e21ed09fa668416fa7721e08d451b9903485", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "0ba7f969be599e21d4b1f1e947593de6515f4996", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "8ef25fb13494e35c6dbe15445c7875fa92bc3e8b", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "b8fee83aa4ed3846c7f50a0b364bc699f48d96e5", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "6acb8a453388374fafb3c3b37534b675b2aa0ae1", "status": "affected", "versionType": "git" }, { "version": "6d07d1cd300f4c7e16005f881fea388164999cc8", "lessThan": "4f3175979e62de3b929bfa54a0db4b87d36257a7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "arch/powerpc/kernel/rtas_flash.c" ], "versions": [ { "version": "4.16", "status": "affected" }, { "version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.293", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.255", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.192", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.128", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.47", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.12", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "4.19.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.4.255" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.10.192" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.4.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8f09cc15dcd91d16562400c51d24c7be0d5796fa" }, { "url": "https://git.kernel.org/stable/c/1d29e21ed09fa668416fa7721e08d451b9903485" }, { "url": "https://git.kernel.org/stable/c/0ba7f969be599e21d4b1f1e947593de6515f4996" }, { "url": "https://git.kernel.org/stable/c/8ef25fb13494e35c6dbe15445c7875fa92bc3e8b" }, { "url": "https://git.kernel.org/stable/c/b8fee83aa4ed3846c7f50a0b364bc699f48d96e5" }, { "url": "https://git.kernel.org/stable/c/6acb8a453388374fafb3c3b37534b675b2aa0ae1" }, { "url": "https://git.kernel.org/stable/c/4f3175979e62de3b929bfa54a0db4b87d36257a7" } ], "title": "powerpc/rtas_flash: allow user copy to flash block cache objects", "x_generator": { "engine": "bippy-1.2.0" } } } }