{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98567", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98567", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-18T15:18:33.721Z", "updatedAt": "2026-10-19T09:21:52.909Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: xps: reject an out of range traffic class", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xps: reject an out of range traffic class\n\nOnly the entries below dev->num_tc are valid in dev->tc_to_txq[], and\ndev->prio_tc_map[] may only name classes below it. netdev_set_num_tc()\nlowers dev->num_tc without touching either array.\n\nnetdev_txq_to_tc() walks all TC_MAX_QUEUE slots and\nnetdev_get_prio_tc_map() returns the entry as it stands, so a leftover\nentry is handed out as a traffic class >= dev->num_tc. Taking that\nclass from netdev_txq_to_tc(), __netif_set_xps_queue() rejects only a\nnegative one and indexes an XPS map sized for dev->num_tc classes:\n\n\ttci = j * num_tc + tc;\n\tRCU_INIT_POINTER(new_dev_maps->attr_map[tci], map);\n\nattr_map[] holds nr_ids * num_tc entries and j runs over the ids named\nin the mask, so a class that is not below num_tc pushes tci past the end\nof the map for the last ids and the store overruns it.\n\nAny caller that lowers num_tc leaves such entries behind, and\nmqprio_destroy() tears down with netdev_set_num_tc(dev, 0) rather than\nnetdev_reset_tc(). After mqprio with 8 classes then 1, tc_to_txq[1..7]\nstill describe txq 1..7. The splat is from an XPS write to txq 2 on a\nveth with 8 rx queues: attr_map[] has 8 * 1 entries, tci = j + 2, and\nj == 6 stores one past the end of the 88-byte map:\n\n BUG: KASAN: slab-out-of-bounds in __netif_set_xps_queue (net/core/dev.c:2954)\n Write of size 8 at addr ffff88813016bc58 by task xps_oob/634\n __netif_set_xps_queue (net/core/dev.c:2954)\n xps_rxqs_store (net/core/net-sysfs.c:1880)\n netdev_queue_attr_store (net/core/net-sysfs.c:1390)\n Allocated by task 634:\n __kmalloc_noprof (mm/slub.c:5439)\n __netif_set_xps_queue (net/core/dev.c:2937)\n The buggy address is located 0 bytes to the right of\n allocated 88-byte region [ffff88813016bc00, ffff88813016bc58)\n\nReject a class the map has no room for.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "967e10f40a0c6732db299cbe001df0e859196055" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "1cb8e40525a72c9f1e1cf94c68c172b3b9bbdc81" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "6ea8f643053f33622f9116e4e1db58306ece45e3" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "9e841723ba482d41ecbf90241c756a16cdfea949" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "2cc1c3977acbffc417fb5b57699d1df3dcffb5fd" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "930318290d8509e864c015fe6c9239470b3c579c" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "status": "affected", "versionType": "git", "lessThan": "4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.10" }, { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.112", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.55", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }