{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23105", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.966Z", "datePublished": "2026-02-04T16:08:26.376Z", "dateUpdated": "2026-02-06T16:33:28.539Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-06T16:33:28.539Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag\n\nThis is more of a preventive patch to make the code more consistent and\nto prevent possible exploits that employ child qlen manipulations on qfq.\nuse cl_is_active instead of relying on the child qdisc's qlen to determine\nclass activation."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_qfq.c"], "versions": [{"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "fac2c67bb2bb732eae4283e45fc338af7e08c254", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "b8c24cf5268fb3bfb8d16324c3dbb985f698c835", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "f27047abf7cac1b6f90c3ad60de21ef9f717c26d", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "93b8635974fb050c43d07e35e5edfe6e685ca28a", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "abd9fc26ea577561a5ef6241a1b058755ffdad0c", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "77f1afd0bb4d5da95236f6114e6d0dfcde187ff6", "status": "affected", "versionType": "git"}, {"version": "462dbc9101acd38e92eda93c0726857517a24bbd", "lessThan": "d837fbee92453fbb829f950c8e7cf76207d73f33", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_qfq.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.249", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.68", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc7", "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": "3.8", "versionEndExcluding": "5.10.249"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.199"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.1.162"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.6.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.12.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.18.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.19-rc7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"}, {"url": "https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"}, {"url": "https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"}, {"url": "https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"}, {"url": "https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"}, {"url": "https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"}, {"url": "https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"}], "title": "net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag\n\nThis is more of a preventive patch to make the code more consistent and\nto prevent possible exploits that employ child qlen manipulations on qfq.\nuse cl_is_active instead of relying on the child qdisc's qlen to determine\nclass activation."}], "id": "CVE-2026-23105", "lastModified": "2026-02-06T17:16:25.617", "metrics": {}, "published": "2026-02-04T17:16:21.370", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag", "id": "2436789", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2436789"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23105", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23105\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23105\nhttps://lore.kernel.org/linux-cve-announce/2026020430-CVE-2026-23105-1d6d@gregkh/T"], "threat_severity": "Moderate"}