| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes\n\nCurrently, load_microcode_amd() iterates over all NUMA nodes, retrieves their\nCPU masks and unconditionally accesses per-CPU data for the first CPU of each\nmask.\n\nAccording to Documentation/admin-guide/mm/numaperf.rst:\n\n \"Some memory may share the same node as a CPU, and others are provided as\n memory only nodes.\"\n\nTherefore, some node CPU masks may be empty and wouldn't have a \"first CPU\".\n\nOn a machine with far memory (and therefore CPU-less NUMA nodes):\n- cpumask_of_node(nid) is 0\n- cpumask_first(0) is CONFIG_NR_CPUS\n- cpu_data(CONFIG_NR_CPUS) accesses the cpu_info per-CPU array at an\n index that is 1 out of bounds\n\nThis does not have any security implications since flashing microcode is\na privileged operation but I believe this has reliability implications by\npotentially corrupting memory while flashing a microcode update.\n\nWhen booting with CONFIG_UBSAN_BOUNDS=y on an AMD machine that flashes\na microcode update. I get the following splat:\n\n UBSAN: array-index-out-of-bounds in arch/x86/kernel/cpu/microcode/amd.c:X:Y\n index 512 is out of range for type 'unsigned long[512]'\n [...]\n Call Trace:\n dump_stack\n __ubsan_handle_out_of_bounds\n load_microcode_amd\n request_microcode_amd\n reload_store\n kernfs_fop_write_iter\n vfs_write\n ksys_write\n do_syscall_64\n entry_SYSCALL_64_after_hwframe\n\nChange the loop to go over only NUMA nodes which have CPUs before determining\nwhether the first CPU on the respective node needs microcode update.\n\n [ bp: Massage commit message, fix typo. ]" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "arch/x86/kernel/cpu/microcode/amd.c" |
| ], |
| "versions": [ |
| { |
| "version": "979e197968a1e8f09bf0d706801dba4432f85ab3", |
| "lessThan": "d509c4731090ebd9bbdb72c70a2d70003ae81f4f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "44a44b57e88f311c1415be1f567c50050913c149", |
| "lessThan": "985a536e04bbfffb1770df43c6470f635a6b1073", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "be2710deaed3ab1402379a2ede30a3754fe6767a", |
| "lessThan": "18b5d857c6496b78ead2fd10001b81ae32d30cac", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "d576547f489c935b9897d4acf8beee3325dea8a5", |
| "lessThan": "ec52240622c4d218d0240079b7c1d3ec2328a9f4", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f", |
| "lessThan": "e686349cc19e800dac8971929089ba5ff59abfb0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f", |
| "lessThan": "488ffc0cac38f203979f83634236ee53251ce593", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f", |
| "lessThan": "5ac295dfccb5b015493f86694fa13a0dde4d3665", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "7ff6edf4fef38ab404ee7861f257e28eaaeed35f", |
| "lessThan": "e3e89178a9f4a80092578af3ff3c8478f9187d59", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "d6353e2fc12c5b8f00f86efa30ed73d2da2f77be", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1b1e0eb1d2971a686b9f7bdc146115bcefcbb960", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "eaf5dea1eb8c2928554b3ca717575cbe232b843c", |
| "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/x86/kernel/cpu/microcode/amd.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.3", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.3", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.292", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.236", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.180", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.132", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.84", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.20", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.8", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "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": "5.4.235", |
| "versionEndExcluding": "5.4.292" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.10.173", |
| "versionEndExcluding": "5.10.236" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.15.99", |
| "versionEndExcluding": "5.15.180" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1.16", |
| "versionEndExcluding": "6.1.132" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.3", |
| "versionEndExcluding": "6.6.84" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.3", |
| "versionEndExcluding": "6.12.20" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.3", |
| "versionEndExcluding": "6.13.8" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.3", |
| "versionEndExcluding": "6.14" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.14.308" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.19.276" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.2.3" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/d509c4731090ebd9bbdb72c70a2d70003ae81f4f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/985a536e04bbfffb1770df43c6470f635a6b1073" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/18b5d857c6496b78ead2fd10001b81ae32d30cac" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ec52240622c4d218d0240079b7c1d3ec2328a9f4" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e686349cc19e800dac8971929089ba5ff59abfb0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/488ffc0cac38f203979f83634236ee53251ce593" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/5ac295dfccb5b015493f86694fa13a0dde4d3665" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e3e89178a9f4a80092578af3ff3c8478f9187d59" |
| } |
| ], |
| "title": "x86/microcode/AMD: Fix out-of-bounds on systems with CPU-less NUMA nodes", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21991", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
