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vuln-cve/data/2026/98xxx/CVE-2026-98567.json
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{
"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"
}
}
}
}
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