CVE-2026-68473

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68473", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.396Z", "datePublished": "2026-08-15T05:51:30.274Z", "dateUpdated": "2026-08-17T05:39:16.211Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:16.211Z"}, "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": {"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"}, "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/include/asm/uaccess.h"], "versions": [{"version": "861574d51bbd7a06dbf07f658a9a8def012c2f74", "lessThan": "d5c234774a82f27b594f70c15fc45ce3648e4295", "status": "affected", "versionType": "git"}, {"version": "861574d51bbd7a06dbf07f658a9a8def012c2f74", "lessThan": "d610d3ab18197d87618da11ec5fe8b3cebf32208", "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/include/asm/uaccess.h"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "7.0", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-68473", "lastModified": "2026-08-17T06:17:56.737", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:20:29.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()", "id": "2516508", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516508"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1025", "details": ["A flaw was found in the Linux kernel's powerpc/uaccess component. The mask_user_address() function incorrectly checks for CONFIG_E500 instead of CONFIG_PPC_E500. This error prevents the mask_user_address_isel() function from being used on PowerPC E500 hardware, which could lead to improper handling of user addresses and potentially impact system security or stability."], "name": "CVE-2026-68473", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68473\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68473\nhttps://lore.kernel.org/linux-cve-announce/2026081505-CVE-2026-68473-9c59@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[861574d51bbd7a06dbf07f658a9a8def012c2f74,d5c234774a82f27b594f70c15fc45ce3648e4295)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[861574d51bbd7a06dbf07f658a9a8def012c2f74,d610d3ab18197d87618da11ec5fe8b3cebf32208)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T08:00:06.711075+00:00", "updated": "2026-08-18T07:00:11.230400+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}