{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38177", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.992Z", "datePublished": "2025-07-04T12:47:09.127Z", "dateUpdated": "2025-11-03T19:58:30.487Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-08-28T14:42:59.040Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let's make it idempotent\nto ease qdisc_tree_reduce_backlog() callers' life:\n\n1. update_vf() decreases cl->cl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl->el_node, but we can use\n RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_hfsc.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9a5fd5c2f4d4afdd5e405083ee53e0789ce76956", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a5efc95a33bd4fcb879250852828cc58c7862970", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9030a91235ae4845ec71902c3e0cecfc9ed1f2df", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d06476714d2819b550e0cc39222347e2c8941c9d", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c1175c4ad01dbc9c979d099861fa90a754f72059", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "51eb3b65544c9efd6a1026889ee5fb5aa62da3bb", "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_hfsc.c"], "versions": [{"version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.138", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.90", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.28", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.6", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.297"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.241"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.190"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.138"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.28"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.14.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9a5fd5c2f4d4afdd5e405083ee53e0789ce76956"}, {"url": "https://git.kernel.org/stable/c/72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7"}, {"url": "https://git.kernel.org/stable/c/a5efc95a33bd4fcb879250852828cc58c7862970"}, {"url": "https://git.kernel.org/stable/c/0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87"}, {"url": "https://git.kernel.org/stable/c/9030a91235ae4845ec71902c3e0cecfc9ed1f2df"}, {"url": "https://git.kernel.org/stable/c/d06476714d2819b550e0cc39222347e2c8941c9d"}, {"url": "https://git.kernel.org/stable/c/c1175c4ad01dbc9c979d099861fa90a754f72059"}, {"url": "https://git.kernel.org/stable/c/51eb3b65544c9efd6a1026889ee5fb5aa62da3bb"}], "title": "sch_hfsc: make hfsc_qlen_notify() idempotent", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:58:30.487Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let's make it idempotent\nto ease qdisc_tree_reduce_backlog() callers' life:\n\n1. update_vf() decreases cl->cl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl->el_node, but we can use\n RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sch_hfsc: hace que hfsc_qlen_notify() sea idempotente. hfsc_qlen_notify() tampoco es idempotente y no es compatible con quienes lo llaman, como fq_codel_dequeue(). Vamos a convertirlo en idempotente para simplificar la tarea de quienes llaman a qdisc_tree_reduce_backlog(): 1. update_vf() reduce cl->cl_nactive, lo que permite comprobar si es distinto de cero antes de llamarlo. 2. eltree_remove() siempre elimina el nodo RB cl->el_node, pero podemos usar RB_EMPTY_NODE() + RB_CLEAR_NODE() para hacerlo seguro."}], "id": "CVE-2025-38177", "lastModified": "2025-11-03T20:18:46.777", "metrics": {}, "published": "2025-07-04T13:15:24.033", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51eb3b65544c9efd6a1026889ee5fb5aa62da3bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9030a91235ae4845ec71902c3e0cecfc9ed1f2df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a5fd5c2f4d4afdd5e405083ee53e0789ce76956"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5efc95a33bd4fcb879250852828cc58c7862970"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c1175c4ad01dbc9c979d099861fa90a754f72059"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d06476714d2819b550e0cc39222347e2c8941c9d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: sch_hfsc: make hfsc_qlen_notify() idempotent", "id": "2376354", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376354"}, "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": ["In the Linux kernel, the following vulnerability has been resolved:\nsch_hfsc: make hfsc_qlen_notify() idempotent\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let's make it idempotent\nto ease qdisc_tree_reduce_backlog() callers' life:\n1. update_vf() decreases cl->cl_nactive, so we can check whether it is\nnon-zero before calling it.\n2. eltree_remove() always removes RB node cl->el_node, but we can use\nRB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe."], "name": "CVE-2025-38177", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38177\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38177\nhttps://lore.kernel.org/linux-cve-announce/2025070411-CVE-2025-38177-bd6c@gregkh/T"], "threat_severity": "Moderate"}