178 lines
9.5 KiB
JSON
178 lines
9.5 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-2021-46947",
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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": "2024-02-25T13:45:52.722Z",
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"datePublished": "2024-02-27T18:40:32.277Z",
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"dateUpdated": "2026-05-11T13:44:57.975Z"
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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": "2026-05-11T13:44:57.975Z"
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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\nsfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues\n\nefx->xdp_tx_queue_count is initially initialized to num_possible_cpus() and is\nlater used to allocate and traverse efx->xdp_tx_queues lookup array. However,\nwe may end up not initializing all the array slots with real queues during\nprobing. This results, for example, in a NULL pointer dereference, when running\n\"# ethtool -S <iface>\", similar to below\n\n[2570283.664955][T4126959] BUG: kernel NULL pointer dereference, address: 00000000000000f8\n[2570283.681283][T4126959] #PF: supervisor read access in kernel mode\n[2570283.695678][T4126959] #PF: error_code(0x0000) - not-present page\n[2570283.710013][T4126959] PGD 0 P4D 0\n[2570283.721649][T4126959] Oops: 0000 [#1] SMP PTI\n[2570283.734108][T4126959] CPU: 23 PID: 4126959 Comm: ethtool Tainted: G O 5.10.20-cloudflare-2021.3.1 #1\n[2570283.752641][T4126959] Hardware name: <redacted>\n[2570283.781408][T4126959] RIP: 0010:efx_ethtool_get_stats+0x2ca/0x330 [sfc]\n[2570283.796073][T4126959] Code: 00 85 c0 74 39 48 8b 95 a8 0f 00 00 48 85 d2 74 2d 31 c0 eb 07 48 8b 95 a8 0f 00 00 48 63 c8 49 83 c4 08 83 c0 01 48 8b 14 ca <48> 8b 92 f8 00 00 00 49 89 54 24 f8 39 85 a0 0f 00 00 77 d7 48 8b\n[2570283.831259][T4126959] RSP: 0018:ffffb79a77657ce8 EFLAGS: 00010202\n[2570283.845121][T4126959] RAX: 0000000000000019 RBX: ffffb799cd0c9280 RCX: 0000000000000018\n[2570283.860872][T4126959] RDX: 0000000000000000 RSI: ffff96dd970ce000 RDI: 0000000000000005\n[2570283.876525][T4126959] RBP: ffff96dd86f0a000 R08: ffff96dd970ce480 R09: 000000000000005f\n[2570283.892014][T4126959] R10: ffffb799cd0c9fff R11: ffffb799cd0c9000 R12: ffffb799cd0c94f8\n[2570283.907406][T4126959] R13: ffffffffc11b1090 R14: ffff96dd970ce000 R15: ffffffffc11cd66c\n[2570283.922705][T4126959] FS: 00007fa7723f8740(0000) GS:ffff96f51fac0000(0000) knlGS:0000000000000000\n[2570283.938848][T4126959] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[2570283.952524][T4126959] CR2: 00000000000000f8 CR3: 0000001a73e6e006 CR4: 00000000007706e0\n[2570283.967529][T4126959] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[2570283.982400][T4126959] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[2570283.997308][T4126959] PKRU: 55555554\n[2570284.007649][T4126959] Call Trace:\n[2570284.017598][T4126959] dev_ethtool+0x1832/0x2830\n\nFix this by adjusting efx->xdp_tx_queue_count after probing to reflect the true\nvalue of initialized slots in efx->xdp_tx_queues."
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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/sfc/efx_channels.c"
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],
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"versions": [
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{
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"version": "e26ca4b535820b1445dcef3c0f82b3fb5b45108b",
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"lessThan": "ebeac958b690123a0b40aa61f688f2f170035fad",
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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": "e26ca4b535820b1445dcef3c0f82b3fb5b45108b",
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"lessThan": "99ba0ea616aabdc8e26259fd722503e012199a76",
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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/sfc/efx_channels.c"
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],
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"versions": [
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{
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"version": "5.12",
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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": "5.12",
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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": "5.12.3",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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": "5.12",
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"versionEndExcluding": "5.12.3"
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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": "5.12",
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"versionEndExcluding": "5.13"
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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/ebeac958b690123a0b40aa61f688f2f170035fad"
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},
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{
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"url": "https://git.kernel.org/stable/c/99ba0ea616aabdc8e26259fd722503e012199a76"
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}
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],
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"title": "sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues",
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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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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2021-46947",
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"role": "CISA Coordinator",
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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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"version": "2.0.3",
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"timestamp": "2024-02-27T19:26:26.260360Z"
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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": "2024-07-05T17:22:02.366Z"
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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": "2024-08-04T05:17:42.996Z"
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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/ebeac958b690123a0b40aa61f688f2f170035fad",
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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/99ba0ea616aabdc8e26259fd722503e012199a76",
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"tags": [
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} |