185 lines
9.8 KiB
JSON
185 lines
9.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-40341",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T07:20:57.187Z",
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"datePublished": "2025-12-09T04:09:58.392Z",
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"dateUpdated": "2026-05-11T21:47:29.607Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T21:47:29.607Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Don't leak robust_list pointer on exec race\n\nsys_get_robust_list() and compat_get_robust_list() use ptrace_may_access()\nto check if the calling task is allowed to access another task's\nrobust_list pointer. This check is racy against a concurrent exec() in the\ntarget process.\n\nDuring exec(), a task may transition from a non-privileged binary to a\nprivileged one (e.g., setuid binary) and its credentials/memory mappings\nmay change. If get_robust_list() performs ptrace_may_access() before\nthis transition, it may erroneously allow access to sensitive information\nafter the target becomes privileged.\n\nA racy access allows an attacker to exploit a window during which\nptrace_may_access() passes before a target process transitions to a\nprivileged state via exec().\n\nFor example, consider a non-privileged task T that is about to execute a\nsetuid-root binary. An attacker task A calls get_robust_list(T) while T\nis still unprivileged. Since ptrace_may_access() checks permissions\nbased on current credentials, it succeeds. However, if T begins exec\nimmediately afterwards, it becomes privileged and may change its memory\nmappings. Because get_robust_list() proceeds to access T->robust_list\nwithout synchronizing with exec() it may read user-space pointers from a\nnow-privileged process.\n\nThis violates the intended post-exec access restrictions and could\nexpose sensitive memory addresses or be used as a primitive in a larger\nexploit chain. Consequently, the race can lead to unauthorized\ndisclosure of information across privilege boundaries and poses a\npotential security risk.\n\nTake a read lock on signal->exec_update_lock prior to invoking\nptrace_may_access() and accessing the robust_list/compat_robust_list.\nThis ensures that the target task's exec state remains stable during the\ncheck, allowing for consistent and synchronized validation of\ncredentials."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/futex/syscalls.c"
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],
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"versions": [
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{
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"version": "0771dfefc9e538f077d0b43b6dec19a5a67d0e70",
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"lessThan": "6511984d1aa1360181bcafb1ca75df7f291ef237",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0771dfefc9e538f077d0b43b6dec19a5a67d0e70",
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"lessThan": "4aced32596ead1820b7dbd8e40d30b30dc1f3ad4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0771dfefc9e538f077d0b43b6dec19a5a67d0e70",
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"lessThan": "3b4222494489f6d4b8705a496dab03384b7ca998",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0771dfefc9e538f077d0b43b6dec19a5a67d0e70",
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"lessThan": "b524455a51feb6013df3a5dba3160487b2e8e22a",
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"status": "affected",
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{
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"version": "0771dfefc9e538f077d0b43b6dec19a5a67d0e70",
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"lessThan": "6b54082c3ed4dc9821cdf0edb17302355cc5bb45",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/futex/syscalls.c"
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],
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"versions": [
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{
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"version": "2.6.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.159",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.117",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.58",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17.8",
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"lessThanOrEqual": "6.17.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"versionStartIncluding": "2.6.17",
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"versionEndExcluding": "6.1.159"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6511984d1aa1360181bcafb1ca75df7f291ef237"
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},
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{
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"url": "https://git.kernel.org/stable/c/4aced32596ead1820b7dbd8e40d30b30dc1f3ad4"
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},
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{
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"url": "https://git.kernel.org/stable/c/3b4222494489f6d4b8705a496dab03384b7ca998"
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},
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{
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"url": "https://git.kernel.org/stable/c/b524455a51feb6013df3a5dba3160487b2e8e22a"
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},
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{
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"url": "https://git.kernel.org/stable/c/6b54082c3ed4dc9821cdf0edb17302355cc5bb45"
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}
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],
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"title": "futex: Don't leak robust_list pointer on exec race",
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