CVE-2026-46333

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46333", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.113Z", "datePublished": "2026-05-15T12:58:44.599Z", "dateUpdated": "2026-11-10T12:47:32.981Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:31:28.199Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptrace: slightly saner 'get_dumpable()' logic\n\nThe 'dumpability' of a task is fundamentally about the memory image of\nthe task - the concept comes from whether it can core dump or not - and\nmakes no sense when you don't have an associated mm.\n\nAnd almost all users do in fact use it only for the case where the task\nhas a mm pointer.\n\nBut we have one odd special case: ptrace_may_access() uses 'dumpable' to\ncheck various other things entirely independently of the MM (typically\nexplicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for\nthreads that no longer have a VM (and maybe never did, like most kernel\nthreads).\n\nIt's not what this flag was designed for, but it is what it is.\n\nThe ptrace code does check that the uid/gid matches, so you do have to\nbe uid-0 to see kernel thread details, but this means that the\ntraditional \"drop capabilities\" model doesn't make any difference for\nthis all.\n\nMake it all make a *bit* more sense by saying that if you don't have a\nMM pointer, we'll use a cached \"last dumpability\" flag if the thread\never had a MM (it will be zero for kernel threads since it is never\nset), and require a proper CAP_SYS_PTRACE capability to override."}], "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:N", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable authorization check is reached through local interfaces such as ptrace-style checks, procfs, and pidfd_getfd; it is not reachable from network packets or adjacent/physical input.\nAC:L - A local attacker can repeatedly trigger the relevant check and, for exiting tasks, can race pidfd_getfd/procfs access against a target's exit path after exit_mm() but before exit_files(). The race is attacker-driven and does not require unusual kernel configuration or conditions outside the attacker's influence.\nPR:L - An unprivileged local user can target same-UID nondumpable tasks because the vulnerable code skips the dumpability requirement once task->mm is NULL. User-namespace root does not help against init-namespace root kernel threads, but low local privileges are enough for the same-UID exiting-task case.\nUI:N - Exploitation does not require a victim user to open a file or perform an interactive action; the attacker can use local syscalls/procfs against an existing or attacker-terminated target task.\nS:U - The bug bypasses Linux kernel task-access authorization within the same OS security authority. It does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - The bypass can allow access to sensitive task details and, most importantly, pidfd_getfd can duplicate file descriptors from a nondumpable task during the exit window. In a plausible helper/sandbox scenario, those descriptors can expose highly sensitive files or privileged resources.\nI:H - If the duplicated descriptor is writable, the attacker can modify the protected resource reachable through the victim's file descriptor despite the dumpability restriction. This is a high-impact integrity bypass even though the bug is not memory corruption.\nA:N - The issue is an access-control bypass around ptrace/dumpability checks and does not by itself provide a kernel crash, hang, deadlock, or sustained denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/sched.h", "kernel/exit.c", "kernel/ptrace.c"], "versions": [{"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6", "status": "affected", "versionType": "git"}, {"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "15b828a46f305ae9f05a7c16914b3ce273474205", "status": "affected", "versionType": "git"}, {"version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "4709234fd1b95136ceb789f639b1e7ea5de1b181", "status": "affected", "versionType": "git"}, {"version": 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"versionType": "semver"}, {"version": "5.15.207", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.173", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.139", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.89", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.31", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.8", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.10", "versionEndExcluding": "5.10.256"}, {"vulnerable": true, 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"https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d"}, {"url": "https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730"}, {"url": "https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"}], "title": "ptrace: slightly saner 'get_dumpable()' logic", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/15/9"}, {"url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/20/14"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/20/16"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-05-20T18:47:13.604Z"}}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-269", "lang": "en", 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The race is attacker-driven and does not require unusual kernel configuration or conditions outside the attacker's influence.\nPR:L - An unprivileged local user can target same-UID nondumpable tasks because the vulnerable code skips the dumpability requirement once task->mm is NULL. User-namespace root does not help against init-namespace root kernel threads, but low local privileges are enough for the same-UID exiting-task case.\nUI:N - Exploitation does not require a victim user to open a file or perform an interactive action; the attacker can use local syscalls/procfs against an existing or attacker-terminated target task.\nS:U - The bug bypasses Linux kernel task-access authorization within the same OS security authority. It does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - The bypass can allow access to sensitive task details and, most importantly, pidfd_getfd can duplicate file descriptors from a nondumpable task during the exit window. In a plausible helper/sandbox scenario, those descriptors can expose highly sensitive files or privileged resources.\nI:H - If the duplicated descriptor is writable, the attacker can modify the protected resource reachable through the victim's file descriptor despite the dumpability restriction. This is a high-impact integrity bypass even though the bug is not memory corruption.\nA:N - The issue is an access-control bypass around ptrace/dumpability checks and does not by itself provide a kernel crash, hang, deadlock, or sustained denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "15b828a46f305ae9f05a7c16914b3ce273474205", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "4709234fd1b95136ceb789f639b1e7ea5de1b181", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "8f907d345bae8f4b3f004c5abc56bf2dfb851ea7", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "2a93a4fac7b6051d3be7cd1b015fe7320cd0404d", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "01363cb3fbd0238ffdeb09f53e9039c9edf8a730", "versionType": "git"}, {"status": "affected", "version": "bfedb589252c01fa505ac9f6f2a3d5d68d707ef4", "lessThan": "31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a", "versionType": "git"}, {"status": "affected", "version": "d5b3e840dbf6dd2c0f30b5982b6f5ecd49e46b12", "versionType": "git"}, {"status": "affected", "version": "03eed7afbc09e061f66b448daf7863174c3dc3f3", "versionType": "git"}, {"status": "affected", "version": "e45692fa1aea06676449b63ef3c2b6e1e72b7578", "versionType": "git"}, {"status": "affected", "version": "694a95fa6dae4991f16cda333d897ea063021fed", "versionType": "git"}, {"status": "affected", "version": "3.16.52", "lessThan": "3.17", "versionType": "semver"}, {"status": "affected", "version": "4.4.40", "lessThan": "4.5", "versionType": "semver"}, {"status": "affected", "version": "4.8.16", "lessThan": "4.9", "versionType": "semver"}, {"status": "affected", "version": "4.9.1", "lessThan": "4.10", "versionType": "semver"}], "programFiles": ["include/linux/sched.h", "kernel/exit.c", "kernel/ptrace.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.10"}, {"status": "unaffected", "version": "0", "lessThan": "4.10", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.256", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.207", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.173", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.139", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.89", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.31", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.8", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["include/linux/sched.h", "kernel/exit.c", "kernel/ptrace.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/93d4ba49d18e3d7fb41a9927c2d0cca5e9dfefd6"}, {"url": "https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205"}, {"url": "https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181"}, {"url": "https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7"}, {"url": "https://git.kernel.org/stable/c/6e5b51e74a40d377bcd3081dd33fbaa0e1aa7e3d"}, {"url": "https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d"}, {"url": "https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730"}, {"url": "https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptrace: slightly saner 'get_dumpable()' logic\n\nThe 'dumpability' of a task is fundamentally about the memory image of\nthe task - the concept comes from whether it can core dump or not - and\nmakes no sense when you don't have an associated mm.\n\nAnd almost all users do in fact use it only for the case where the task\nhas a mm pointer.\n\nBut we have one odd special case: ptrace_may_access() uses 'dumpable' to\ncheck various other things entirely independently of the MM (typically\nexplicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for\nthreads that no longer have a VM (and maybe never did, like most kernel\nthreads).\n\nIt's not what this flag was designed for, but it is what it is.\n\nThe ptrace code does check that the uid/gid matches, so you do have to\nbe uid-0 to see kernel thread details, but this means that the\ntraditional \"drop capabilities\" model doesn't make any difference for\nthis all.\n\nMake it all make a *bit* more sense by saying that if you don't have a\nMM pointer, we'll use a cached \"last dumpability\" flag if the thread\never had a MM (it will be zero for kernel threads since it is never\nset), and require a proper CAP_SYS_PTRACE capability to override."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.256", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.207", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.173", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.139", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.89", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.31", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.8", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "3.16.52"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.4.40"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.8.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:31:28.199Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46333", "state": "PUBLISHED", "dateUpdated": "2026-11-10T12:47:32.981Z", "dateReserved": "2026-05-13T15:03:33.113Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-15T12:58:44.599Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Including for\nthreads that no longer have a VM (and maybe never did, like most kernel\nthreads).\n\nIt's not what this flag was designed for, but it is what it is.\n\nThe ptrace code does check that the uid/gid matches, so you do have to\nbe uid-0 to see kernel thread details, but this means that the\ntraditional \"drop capabilities\" model doesn't make any difference for\nthis all.\n\nMake it all make a *bit* more sense by saying that if you don't have a\nMM pointer, we'll use a cached \"last dumpability\" flag if the thread\never had a MM (it will be zero for kernel threads since it is never\nset), and require a proper CAP_SYS_PTRACE capability to override."}], "id": "CVE-2026-46333", "lastModified": "2026-11-10T13:19:18.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", 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{"bugzilla": {"description": "kernel: Read root-owned files as an unprivileged user", "id": "2477802", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477802"}, "csaw": true, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-269", "details": ["A vulnerability was found in the Linux kernel that allows an unprivileged local user to read sensitive files normally restricted to the root user. The flaw occurs during process exit, where a brief window allows an attacker to intercept file access from a privileged process before it fully terminates. Successful exploitation may lead to the disclosure of sensitive data such as SSH host private keys or /etc/shadow contents."], "name": "CVE-2026-46333", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-15T05:55:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46333\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46333\nhttps://github.com/0xdeadbeefnetwork/ssh-keysign-pwn\nhttps://github.com/torvalds/linux/commit/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"], "statement": "This is an Important flaw in the Linux kernel that allows a local unprivileged attacker to read root-owned files. The vulnerability arises from a race condition during process termination, enabling a brief window where sensitive data, such as SSH host private keys or /etc/shadow contents, can be disclosed. This could lead to unauthorized access to sensitive information on affected Red Hat Enterprise Linux systems.", "threat_severity": "Important"}

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