CVE-2026-72068

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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": 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"options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:51:04.940462Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:55:19.267Z"}}]}}

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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "4.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:07:35.943Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72068", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:55:19.267Z", "dateReserved": "2026-08-09T03:40:39.903Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:52:21.007Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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."}], "id": "CVE-2026-72068", "lastModified": "2026-11-06T17:19:36.033", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72068", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:51:04.940462Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:16.467", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fafc4d9b411645eb34de43362b966dc8fb3e263"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26aff38fefb1d6cd87e22525f41cc8f1aa61b24f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/384628d6cdde0fcd76868606fad3ad8293100afb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/571e1f10b5996ba3e4dc63ea77de4aa309c384ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cff8281bacd2866767e6194c3079d33b6c5a74f4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea6a188ee805e841a0e242f14d15953e0dfa74bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edf6babb9edd2d3e19229ade339081f439d4f478"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/feb5c87c8514444ba891b75a5a3eae57c64edaf8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: posix-cpu-timers: Use u64 multiplication in update_rlimit_cpu()", "id": "2516242", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516242"}, "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-190", "details": ["A flaw was found in the Linux kernel's `posix-cpu-timers` component on 32-bit systems. An integer truncation vulnerability occurs in the `update_rlimit_cpu()` function when converting the `RLIMIT_CPU` value to nanoseconds. This issue causes the process CPU timer to be programmed to fire prematurely for `RLIMIT_CPU` soft limits of 5 seconds or more. While actual resource limit enforcement remains correct, this premature timer expiry could lead to a denial of service for affected processes."], "name": "CVE-2026-72068", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "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-2026-72068\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72068\nhttps://lore.kernel.org/linux-cve-announce/2026081518-CVE-2026-72068-23e7@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,feb5c87c8514444ba891b75a5a3eae57c64edaf8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,384628d6cdde0fcd76868606fad3ad8293100afb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,571e1f10b5996ba3e4dc63ea77de4aa309c384ce)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,cff8281bacd2866767e6194c3079d33b6c5a74f4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,edf6babb9edd2d3e19229ad339081f439d4f478)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,ea6a188ee805e841a0e242f14d15953e0dfa74bb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[858cf3a8c59968e7c5f7c1a1192459a0d52d1ab4,26aff38fefb1d6cd87e22525f41cc8f1aa61b24f)"}}], "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": "4.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T13:30:04.538930+00:00", "updated": "2026-08-18T03:45:04.029035+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}