{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72068","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-09T03:40:39.903Z","datePublished":"2026-08-15T05:52:21.007Z","dateUpdated":"2026-08-17T05:07:35.943Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T05:07:35.943Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/time/posix-cpu-timers.c"],"versions":[{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"feb5c87c8514444ba891b75a5a3eae57c64edaf8","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"384628d6cdde0fcd76868606fad3ad8293100afb","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"1fafc4d9b411645eb34de43362b966dc8fb3e263","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"cff8281bacd2866767e6194c3079d33b6c5a74f4","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"edf6babb9edd2d3e19229ade339081f439d4f478","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"ea6a188ee805e841a0e242f14d15953e0dfa74bb","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"571e1f10b5996ba3e4dc63ea77de4aa309c384ce","status":"affected","versionType":"git"},{"version":"858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4","lessThan":"26aff38fefb1d6cd87e22525f41cc8f1aa61b24f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/time/posix-cpu-timers.c"],"versions":[{"version":"4.11","status":"affected"},{"version":"0","lessThan":"4.11","status":"unaffected","versionType":"semver"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","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":"4.11","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.2"}]}]}],"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"}}}}