{"api_version":"1","generated_at":"2026-08-25T16:45:05+00:00","cve":"CVE-2026-72068","urls":{"html":"https://cve.report/CVE-2026-72068","api":"https://cve.report/api/cve/CVE-2026-72068.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72068","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72068"},"summary":{"title":"posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()\n\nupdate_rlimit_cpu() converts the RLIMIT_CPU value to nanoseconds with\n\n        u64 nsecs = rlim_new * NSEC_PER_SEC;\n\nOn 32-bit kernels both rlim_new (unsigned long) and NSEC_PER_SEC\n(1000000000L) are 32-bit, so the multiplication is performed in unsigned\nlong and truncated for rlim_new > 4 seconds before being widened to u64.\n\nThe same file already casts to u64 for the matching computation in\ncheck_process_timers():\n\n        u64 softns = (u64)soft * NSEC_PER_SEC;\n\nAs a result, the truncated value is installed into the CPUCLOCK_PROF\nexpiry cache (nextevt), causing the process CPU timer to be programmed\nto fire prematurely for any RLIMIT_CPU soft limit >= 5 seconds. The\nactual SIGXCPU/SIGKILL decision in check_process_timers() already casts\nto u64 and is therefore correct, so limit enforcement is not broken;\nonly the expiry-cache programming is wrong. Apply the same cast here so\nboth paths convert rlim_cur identically.\n\n64-bit kernels are unaffected.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:16","updated_at":"2026-08-17 06:18:05"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ea6a188ee805e841a0e242f14d15953e0dfa74bb","name":"https://git.kernel.org/stable/c/ea6a188ee805e841a0e242f14d15953e0dfa74bb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/571e1f10b5996ba3e4dc63ea77de4aa309c384ce","name":"https://git.kernel.org/stable/c/571e1f10b5996ba3e4dc63ea77de4aa309c384ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/edf6babb9edd2d3e19229ade339081f439d4f478","name":"https://git.kernel.org/stable/c/edf6babb9edd2d3e19229ade339081f439d4f478","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/feb5c87c8514444ba891b75a5a3eae57c64edaf8","name":"https://git.kernel.org/stable/c/feb5c87c8514444ba891b75a5a3eae57c64edaf8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/384628d6cdde0fcd76868606fad3ad8293100afb","name":"https://git.kernel.org/stable/c/384628d6cdde0fcd76868606fad3ad8293100afb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cff8281bacd2866767e6194c3079d33b6c5a74f4","name":"https://git.kernel.org/stable/c/cff8281bacd2866767e6194c3079d33b6c5a74f4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/26aff38fefb1d6cd87e22525f41cc8f1aa61b24f","name":"https://git.kernel.org/stable/c/26aff38fefb1d6cd87e22525f41cc8f1aa61b24f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1fafc4d9b411645eb34de43362b966dc8fb3e263","name":"https://git.kernel.org/stable/c/1fafc4d9b411645eb34de43362b966dc8fb3e263","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72068","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72068","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 feb5c87c8514444ba891b75a5a3eae57c64edaf8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 384628d6cdde0fcd76868606fad3ad8293100afb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 1fafc4d9b411645eb34de43362b966dc8fb3e263 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 cff8281bacd2866767e6194c3079d33b6c5a74f4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 edf6babb9edd2d3e19229ade339081f439d4f478 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 ea6a188ee805e841a0e242f14d15953e0dfa74bb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 571e1f10b5996ba3e4dc63ea77de4aa309c384ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4 26aff38fefb1d6cd87e22525f41cc8f1aa61b24f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* 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":"72068","cve":"CVE-2026-72068","epss":"0.002200000","percentile":"0.127060000","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":["kernel/time/posix-cpu-timers.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"feb5c87c8514444ba891b75a5a3eae57c64edaf8","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"384628d6cdde0fcd76868606fad3ad8293100afb","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"1fafc4d9b411645eb34de43362b966dc8fb3e263","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"cff8281bacd2866767e6194c3079d33b6c5a74f4","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"edf6babb9edd2d3e19229ade339081f439d4f478","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"ea6a188ee805e841a0e242f14d15953e0dfa74bb","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"571e1f10b5996ba3e4dc63ea77de4aa309c384ce","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"},{"lessThan":"26aff38fefb1d6cd87e22525f41cc8f1aa61b24f","status":"affected","version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/time/posix-cpu-timers.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","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":"5.10.261","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()\n\nupdate_rlimit_cpu() converts the RLIMIT_CPU value to nanoseconds with\n\n        u64 nsecs = rlim_new * NSEC_PER_SEC;\n\nOn 32-bit kernels both rlim_new (unsigned long) and NSEC_PER_SEC\n(1000000000L) are 32-bit, so the multiplication is performed in unsigned\nlong and truncated for rlim_new > 4 seconds before being widened to u64.\n\nThe same file already casts to u64 for the matching computation in\ncheck_process_timers():\n\n        u64 softns = (u64)soft * NSEC_PER_SEC;\n\nAs a result, the truncated value is installed into the CPUCLOCK_PROF\nexpiry cache (nextevt), causing the process CPU timer to be programmed\nto fire prematurely for any RLIMIT_CPU soft limit >= 5 seconds. The\nactual SIGXCPU/SIGKILL decision in check_process_timers() already casts\nto u64 and is therefore correct, so limit enforcement is not broken;\nonly the expiry-cache programming is wrong. Apply the same cast here so\nboth paths convert rlim_cur identically.\n\n64-bit kernels are unaffected."}],"providerMetadata":{"dateUpdated":"2026-08-17T05:07:35.943Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/feb5c87c8514444ba891b75a5a3eae57c64edaf8"},{"url":"https://git.kernel.org/stable/c/384628d6cdde0fcd76868606fad3ad8293100afb"},{"url":"https://git.kernel.org/stable/c/1fafc4d9b411645eb34de43362b966dc8fb3e263"},{"url":"https://git.kernel.org/stable/c/cff8281bacd2866767e6194c3079d33b6c5a74f4"},{"url":"https://git.kernel.org/stable/c/edf6babb9edd2d3e19229ade339081f439d4f478"},{"url":"https://git.kernel.org/stable/c/ea6a188ee805e841a0e242f14d15953e0dfa74bb"},{"url":"https://git.kernel.org/stable/c/571e1f10b5996ba3e4dc63ea77de4aa309c384ce"},{"url":"https://git.kernel.org/stable/c/26aff38fefb1d6cd87e22525f41cc8f1aa61b24f"}],"title":"posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72068","datePublished":"2026-08-15T05:52:21.007Z","dateReserved":"2026-08-09T03:40:39.903Z","dateUpdated":"2026-08-17T05:07:35.943Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:16","lastModifiedDate":"2026-08-17 06:18:05","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72068","Ordinal":"1","Title":"posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()","CVE":"CVE-2026-72068","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72068","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()\n\nupdate_rlimit_cpu() converts the RLIMIT_CPU value to nanoseconds with\n\n        u64 nsecs = rlim_new * NSEC_PER_SEC;\n\nOn 32-bit kernels both rlim_new (unsigned long) and NSEC_PER_SEC\n(1000000000L) are 32-bit, so the multiplication is performed in unsigned\nlong and truncated for rlim_new > 4 seconds before being widened to u64.\n\nThe same file already casts to u64 for the matching computation in\ncheck_process_timers():\n\n        u64 softns = (u64)soft * NSEC_PER_SEC;\n\nAs a result, the truncated value is installed into the CPUCLOCK_PROF\nexpiry cache (nextevt), causing the process CPU timer to be programmed\nto fire prematurely for any RLIMIT_CPU soft limit >= 5 seconds. The\nactual SIGXCPU/SIGKILL decision in check_process_timers() already casts\nto u64 and is therefore correct, so limit enforcement is not broken;\nonly the expiry-cache programming is wrong. Apply the same cast here so\nboth paths convert rlim_cur identically.\n\n64-bit kernels are unaffected.","Type":"Description","Title":"posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()"}]}}}