{"api_version":"1","generated_at":"2026-08-22T05:34:10+00:00","cve":"CVE-2026-68473","urls":{"html":"https://cve.report/CVE-2026-68473","api":"https://cve.report/api/cve/CVE-2026-68473.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68473","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68473"},"summary":{"title":"powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()\n\nmask_user_address() incorrectly checks for CONFIG_E500 instead of\nCONFIG_PPC_E500, causing mask_user_address_isel() to not be used on\nE500 hardware. Fix the check to use the correct name.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:20:29","updated_at":"2026-08-17 06:17:56"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208","name":"https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295","name":"https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68473","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68473","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 861574d51bbd7a06dbf07f658a9a8def012c2f74 d5c234774a82f27b594f70c15fc45ce3648e4295 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 861574d51bbd7a06dbf07f658a9a8def012c2f74 d610d3ab18197d87618da11ec5fe8b3cebf32208 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"68473","cve":"CVE-2026-68473","epss":"0.001540000","percentile":"0.050510000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/powerpc/include/asm/uaccess.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d5c234774a82f27b594f70c15fc45ce3648e4295","status":"affected","version":"861574d51bbd7a06dbf07f658a9a8def012c2f74","versionType":"git"},{"lessThan":"d610d3ab18197d87618da11ec5fe8b3cebf32208","status":"affected","version":"861574d51bbd7a06dbf07f658a9a8def012c2f74","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/powerpc/include/asm/uaccess.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()\n\nmask_user_address() incorrectly checks for CONFIG_E500 instead of\nCONFIG_PPC_E500, causing mask_user_address_isel() to not be used on\nE500 hardware. Fix the check to use the correct name."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires invoking local syscalls (read/write/ioctl/futex/socket) that reach masked uaccess helpers; the bug is in arch/powerpc uaccess.h and is not triggered by remote packet handling alone.\nAC:L - On affected PPC_E500 kernels (7.0+), any user pointer with bit 31 set reliably redirects to 0x80000000 on masked copy/futex paths without races or rare layout wins.\nPR:L - Any unprivileged local process can pass crafted userspace pointers into copy_from_user, strncpy_from_user, iov_iter, futex_wake_op, and scoped socket/scm helpers that use masked_user_access_begin.\nUI:N - No victim interaction is required; exploitation is achieved entirely through attacker-controlled syscall arguments and memory mappings.\nS:U - Impact is confined to kernel/user memory boundaries on the same host (cross-process read/write via misdirected uaccess), not a hypervisor or separate security authority escape.\nC:H - Wrong masking lets masked copy_from_user/strncpy_from_user read from 0x80000000 instead of the supplied high user or kernel-range pointer, enabling kernel-mediated disclosure of other mappings at that fixed address.\nI:H - Masked futex atomic ops and scoped user writes on mis-masked pointers can modify memory at 0x80000000 rather than the validated target, corrupting synchronization state or arbitrary user data.\nA:H - Misdirected user accesses can trigger KUAP/KUEP faults, WARN paths, or persistent futex corruption, causing kernel oops/panics or denial of service on embedded E500 systems."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:39:16.211Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295"},{"url":"https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208"}],"title":"powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68473","datePublished":"2026-08-15T05:51:30.274Z","dateReserved":"2026-07-30T09:28:09.396Z","dateUpdated":"2026-08-17T05:39:16.211Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:20:29","lastModifiedDate":"2026-08-17 06:17:56","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68473","Ordinal":"1","Title":"powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_","CVE":"CVE-2026-68473","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68473","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()\n\nmask_user_address() incorrectly checks for CONFIG_E500 instead of\nCONFIG_PPC_E500, causing mask_user_address_isel() to not be used on\nE500 hardware. Fix the check to use the correct name.","Type":"Description","Title":"powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_"}]}}}