248 lines
13 KiB
JSON
248 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97959",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:18:58.205Z",
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"datePublished": "2026-09-25T10:23:04.348Z",
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"dateUpdated": "2026-10-19T09:11:25.255Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:11:25.255Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_route: free emptied bucket on filter move\n\nroute4_change can move an existing filter to a different top-level\nbucket: route4_set_parms recomputes the handle from TCA_ROUTE4_TO/\nFROM/IIF, and the handle-mismatch check is gated on the 'new' flag, so\nfor an existing filter the new handle may differ from the old one and\nland in a different bucket. When this happens, the filter is unlinked\nfrom the old bucket, but the bucket itself is never freed once it goes\nempty. The stale empty bucket remains in head->table[], causing\nroute4_delete to report *last=false even after the last live filter is\ngone. That pins the empty tcf_proto and causes a leak.\n\nFix this by refcounting the filters linked to a bucket and freeing the\nbucket when the count drops to zero. The existing scan in route4_delete\ngoes away with it.\n\nThe count is updated at all sites that link or unlink a filter during add,\nchange and delete, and the bucket is dropped from head->table[] as soon as\nit reaches zero.\n\nConditions to recreate the bug:\n CONFIG_NET_CLS_ROUTE4=y, CONFIG_NET_SCH_INGRESS=y, CONFIG_NET_CLS_ACT=y.\n\n tc qdisc replace dev lo clsact\n tc filter add dev lo ingress protocol ip pref 100 route from 1 to 1\n tc filter change dev lo ingress protocol ip pref 100 handle 0x10001 \\\n route from 1 to 2\n tc filter del dev lo ingress protocol ip pref 100 handle 0x10002 \\\n route from 1 to 2\n tc filter show dev lo ingress | grep -c 'pref 100 route chain 0 '"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sched/cls_route.c"
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],
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"versions": [
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "9e7741b41a25b9d49df4d262fa314342e6f95c50",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "48d38bf8c22a05fde07ba1f885cde27b851649a2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "cc99d26b12431e4e4d0e346ec32764eb42c0aed9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "41e94079200aaf0cdbe4594b0af75710b33da124",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "2e2f130951d34871b0643bf700164d97cff4b427",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "f8495d67434e1cb7e511297687ca55fdb28e4c20",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "81dd117c04422c6d0c7974aba9fa6a0ba370959b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1e052be69d045c8d0f82ff1116fd3e5a79661745",
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"lessThan": "1853f30cf5c84971f99788a76207c6f745380896",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sched/cls_route.c"
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],
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"versions": [
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{
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"version": "4.1",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.1",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.271",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.111",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "5.10.271"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "5.15.222"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.1.189"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.6.158"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.12.111"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "6.18.53"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.1",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/9e7741b41a25b9d49df4d262fa314342e6f95c50"
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},
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{
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"url": "https://git.kernel.org/stable/c/48d38bf8c22a05fde07ba1f885cde27b851649a2"
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},
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{
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"url": "https://git.kernel.org/stable/c/cc99d26b12431e4e4d0e346ec32764eb42c0aed9"
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},
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{
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"url": "https://git.kernel.org/stable/c/41e94079200aaf0cdbe4594b0af75710b33da124"
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},
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{
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"url": "https://git.kernel.org/stable/c/2e2f130951d34871b0643bf700164d97cff4b427"
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},
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{
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"url": "https://git.kernel.org/stable/c/f8495d67434e1cb7e511297687ca55fdb28e4c20"
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},
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{
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"url": "https://git.kernel.org/stable/c/81dd117c04422c6d0c7974aba9fa6a0ba370959b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1853f30cf5c84971f99788a76207c6f745380896"
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}
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],
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"title": "net/sched: cls_route: free emptied bucket on filter move",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |