208 lines
11 KiB
JSON
208 lines
11 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-2021-47592",
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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": "2024-05-24T15:11:00.733Z",
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"datePublished": "2024-06-19T14:53:55.574Z",
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"dateUpdated": "2026-05-11T13:57:31.447Z"
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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": "2026-05-11T13:57:31.447Z"
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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: stmmac: fix tc flower deletion for VLAN priority Rx steering\n\nTo replicate the issue:-\n\n1) Add 1 flower filter for VLAN Priority based frame steering:-\n$ IFDEVNAME=eth0\n$ tc qdisc add dev $IFDEVNAME ingress\n$ tc qdisc add dev $IFDEVNAME root mqprio num_tc 8 \\\n map 0 1 2 3 4 5 6 7 0 0 0 0 0 0 0 0 \\\n queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0\n$ tc filter add dev $IFDEVNAME parent ffff: protocol 802.1Q \\\n flower vlan_prio 0 hw_tc 0\n\n2) Get the 'pref' id\n$ tc filter show dev $IFDEVNAME ingress\n\n3) Delete a specific tc flower record (say pref 49151)\n$ tc filter del dev $IFDEVNAME parent ffff: pref 49151\n\nFrom dmesg, we will observe kernel NULL pointer ooops\n\n[ 197.170464] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[ 197.171367] #PF: supervisor read access in kernel mode\n[ 197.171367] #PF: error_code(0x0000) - not-present page\n[ 197.171367] PGD 0 P4D 0\n[ 197.171367] Oops: 0000 [#1] PREEMPT SMP NOPTI\n\n<snip>\n\n[ 197.171367] RIP: 0010:tc_setup_cls+0x20b/0x4a0 [stmmac]\n\n<snip>\n\n[ 197.171367] Call Trace:\n[ 197.171367] <TASK>\n[ 197.171367] ? __stmmac_disable_all_queues+0xa8/0xe0 [stmmac]\n[ 197.171367] stmmac_setup_tc_block_cb+0x70/0x110 [stmmac]\n[ 197.171367] tc_setup_cb_destroy+0xb3/0x180\n[ 197.171367] fl_hw_destroy_filter+0x94/0xc0 [cls_flower]\n\nThe above issue is due to previous incorrect implementation of\ntc_del_vlan_flow(), shown below, that uses flow_cls_offload_flow_rule()\nto get struct flow_rule *rule which is no longer valid for tc filter\ndelete operation.\n\n struct flow_rule *rule = flow_cls_offload_flow_rule(cls);\n struct flow_dissector *dissector = rule->match.dissector;\n\nSo, to ensure tc_del_vlan_flow() deletes the right VLAN cls record for\nearlier configured RX queue (configured by hw_tc) in tc_add_vlan_flow(),\nthis patch introduces stmmac_rfs_entry as driver-side flow_cls_offload\nrecord for 'RX frame steering' tc flower, currently used for VLAN\npriority. The implementation has taken consideration for future extension\nto include other type RX frame steering such as EtherType based.\n\nv2:\n - Clean up overly extensive backtrace and rewrite git message to better\n explain the kernel NULL pointer issue."
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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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"drivers/net/ethernet/stmicro/stmmac/stmmac.h",
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"drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c"
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],
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"versions": [
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{
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"version": "0e039f5cf86ce2fcb62077a163e7ff3d7b7b7cf3",
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"lessThan": "97cb5c82aa1dd85a39b1bd021c8b5f18af623779",
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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": "0e039f5cf86ce2fcb62077a163e7ff3d7b7b7cf3",
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"lessThan": "aeb7c75cb77478fdbf821628e9c95c4baa9adc63",
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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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"drivers/net/ethernet/stmicro/stmmac/stmmac.h",
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"drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c"
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],
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "5.15.11",
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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": "5.16",
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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": "5.13",
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"versionEndExcluding": "5.15.11"
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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": "5.13",
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"versionEndExcluding": "5.16"
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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/97cb5c82aa1dd85a39b1bd021c8b5f18af623779"
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},
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{
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"url": "https://git.kernel.org/stable/c/aeb7c75cb77478fdbf821628e9c95c4baa9adc63"
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}
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],
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"title": "net: stmmac: fix tc flower deletion for VLAN priority Rx steering",
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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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"adp": [
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-476",
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"lang": "en",
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"description": "CWE-476 NULL Pointer Dereference"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-20T15:19:38.436561Z",
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"id": "CVE-2021-47592",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-11-06T15:17:09.361Z"
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}
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},
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T05:47:39.480Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/97cb5c82aa1dd85a39b1bd021c8b5f18af623779",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/aeb7c75cb77478fdbf821628e9c95c4baa9adc63",
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"tags": [
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}
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]
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}
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} |