{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68325", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.296Z", "datePublished": "2025-12-18T15:02:50.214Z", "dateUpdated": "2026-05-23T16:02:41.295Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T16:02:41.295Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_cake: Fix incorrect qlen reduction in cake_drop\n\nIn cake_drop(), qdisc_tree_reduce_backlog() is used to update the qlen\nand backlog of the qdisc hierarchy. Its caller, cake_enqueue(), assumes\nthat the parent qdisc will enqueue the current packet. However, this\nassumption breaks when cake_enqueue() returns NET_XMIT_CN: the parent\nqdisc stops enqueuing current packet, leaving the tree qlen/backlog\naccounting inconsistent. This mismatch can lead to a NULL dereference\n(e.g., when the parent Qdisc is qfq_qdisc).\n\nThis patch computes the qlen/backlog delta in a more robust way by\nobserving the difference before and after the series of cake_drop()\ncalls, and then compensates the qdisc tree accounting if cake_enqueue()\nreturns NET_XMIT_CN.\n\nTo ensure correct compensation when ACK thinning is enabled, a new\nvariable is introduced to keep qlen unchanged."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_cake.c"], "versions": [{"version": "de04ddd2980b48caa8d7e24a7db2742917a8b280", "lessThan": "a3f4e3de41a3f115db35276c6b186ccbc913934a", "status": "affected", "versionType": "git"}, {"version": "0dacfc5372e314d1219f03e64dde3ab495a5a25e", "lessThan": "38abf6e931b169ea88d7529b49096f53a5dcf8fe", "status": "affected", "versionType": "git"}, {"version": "710866fc0a64eafcb8bacd91bcb1329eb7e5035f", "lessThan": "fcb91be52eb6e92e00b533ebd7c77fecada537e1", "status": "affected", "versionType": "git"}, {"version": "aa12ee1c1bd260943fd6ab556d8635811c332eeb", "lessThan": "d01f0e072dadb02fe10f436b940dd957aff0d7d4", "status": "affected", "versionType": "git"}, {"version": "ff57186b2cc39766672c4c0332323933e5faaa88", "lessThan": "0b6216f9b3d1c33c76f74511026e5de5385ee520", "status": "affected", "versionType": "git"}, {"version": "15de71d06a400f7fdc15bf377a2552b0ec437cf5", "lessThan": "529c284cc2815c8350860e9a31722050fe7117cb", "status": "affected", "versionType": "git"}, {"version": "15de71d06a400f7fdc15bf377a2552b0ec437cf5", "lessThan": "3ed6c458530a547ed0c9ea0b02b19bab620be88b", "status": "affected", "versionType": "git"}, {"version": "15de71d06a400f7fdc15bf377a2552b0ec437cf5", "lessThan": "9fefc78f7f02d71810776fdeb119a05a946a27cc", "status": "affected", "versionType": "git"}, {"version": "7689ab22de36f8db19095f6bdf11f28cfde92f5c", "status": "affected", "versionType": "git"}, {"version": "62d591dde4defb1333d202410609c4ddeae060b3", "status": "affected", "versionType": "git"}, {"version": "5.10.241", "lessThan": "5.10.248", "status": "affected", "versionType": "semver"}, {"version": "5.15.190", "lessThan": "5.15.198", "status": "affected", "versionType": "semver"}, {"version": "6.1.149", "lessThan": "6.1.160", "status": "affected", "versionType": "semver"}, {"version": "6.6.103", "lessThan": "6.6.120", "status": "affected", "versionType": "semver"}, {"version": "6.12.44", "lessThan": "6.12.63", "status": "affected", "versionType": "semver"}, {"version": "5.4.297", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "6.16.4", "lessThan": "6.17", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/sch_cake.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "5.10.241", "versionEndExcluding": "5.10.248"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.190", "versionEndExcluding": "5.15.198"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.149", "versionEndExcluding": "6.1.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.103", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.44", "versionEndExcluding": "6.12.63"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.17.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.18.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.297"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a3f4e3de41a3f115db35276c6b186ccbc913934a"}, {"url": "https://git.kernel.org/stable/c/38abf6e931b169ea88d7529b49096f53a5dcf8fe"}, {"url": "https://git.kernel.org/stable/c/fcb91be52eb6e92e00b533ebd7c77fecada537e1"}, {"url": "https://git.kernel.org/stable/c/d01f0e072dadb02fe10f436b940dd957aff0d7d4"}, {"url": "https://git.kernel.org/stable/c/0b6216f9b3d1c33c76f74511026e5de5385ee520"}, {"url": "https://git.kernel.org/stable/c/529c284cc2815c8350860e9a31722050fe7117cb"}, {"url": "https://git.kernel.org/stable/c/3ed6c458530a547ed0c9ea0b02b19bab620be88b"}, {"url": "https://git.kernel.org/stable/c/9fefc78f7f02d71810776fdeb119a05a946a27cc"}], "title": "net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop", "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: sch_cake: Fix incorrect qlen reduction in cake_drop\n\nIn cake_drop(), qdisc_tree_reduce_backlog() is used to update the qlen\nand backlog of the qdisc hierarchy. Its caller, cake_enqueue(), assumes\nthat the parent qdisc will enqueue the current packet. However, this\nassumption breaks when cake_enqueue() returns NET_XMIT_CN: the parent\nqdisc stops enqueuing current packet, leaving the tree qlen/backlog\naccounting inconsistent. This mismatch can lead to a NULL dereference\n(e.g., when the parent Qdisc is qfq_qdisc).\n\nThis patch computes the qlen/backlog delta in a more robust way by\nobserving the difference before and after the series of cake_drop()\ncalls, and then compensates the qdisc tree accounting if cake_enqueue()\nreturns NET_XMIT_CN.\n\nTo ensure correct compensation when ACK thinning is enabled, a new\nvariable is introduced to keep qlen unchanged."}], "id": "CVE-2025-68325", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-18T15:16:06.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b6216f9b3d1c33c76f74511026e5de5385ee520"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38abf6e931b169ea88d7529b49096f53a5dcf8fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3ed6c458530a547ed0c9ea0b02b19bab620be88b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/529c284cc2815c8350860e9a31722050fe7117cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9fefc78f7f02d71810776fdeb119a05a946a27cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3f4e3de41a3f115db35276c6b186ccbc913934a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d01f0e072dadb02fe10f436b940dd957aff0d7d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fcb91be52eb6e92e00b533ebd7c77fecada537e1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop", "id": "2423608", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2423608"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2025-68325", "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": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not 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": "2025-12-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68325\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68325\nhttps://lore.kernel.org/linux-cve-announce/2025121802-CVE-2025-68325-13a9@gregkh/T"]}

{}