{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98567", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.357Z", "datePublished": "2026-10-18T15:18:33.721Z", "dateUpdated": "2026-10-19T09:21:52.909Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:21:52.909Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/dev.c" ], "versions": [ { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "967e10f40a0c6732db299cbe001df0e859196055", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "1cb8e40525a72c9f1e1cf94c68c172b3b9bbdc81", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "6ea8f643053f33622f9116e4e1db58306ece45e3", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "9e841723ba482d41ecbf90241c756a16cdfea949", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "2cc1c3977acbffc417fb5b57699d1df3dcffb5fd", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "930318290d8509e864c015fe6c9239470b3c579c", "status": "affected", "versionType": "git" }, { "version": "184c449f91fef521042970cca46bd5cdfc0e3a37", "lessThan": "4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910", "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/core/dev.c" ], "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "4.10", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/967e10f40a0c6732db299cbe001df0e859196055" }, { "url": "https://git.kernel.org/stable/c/1cb8e40525a72c9f1e1cf94c68c172b3b9bbdc81" }, { "url": "https://git.kernel.org/stable/c/6ea8f643053f33622f9116e4e1db58306ece45e3" }, { "url": "https://git.kernel.org/stable/c/9e841723ba482d41ecbf90241c756a16cdfea949" }, { "url": "https://git.kernel.org/stable/c/eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f" }, { "url": "https://git.kernel.org/stable/c/2cc1c3977acbffc417fb5b57699d1df3dcffb5fd" }, { "url": "https://git.kernel.org/stable/c/930318290d8509e864c015fe6c9239470b3c579c" }, { "url": "https://git.kernel.org/stable/c/4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910" } ], "title": "net: xps: reject an out of range traffic class", "x_generator": { "engine": "bippy-1.2.0" } } } }