172 lines
8.8 KiB
JSON
172 lines
8.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveId": "CVE-2022-48932",
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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": "2024-08-21T06:06:23.299Z",
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"datePublished": "2024-08-22T03:31:25.989Z",
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"dateUpdated": "2026-08-05T08:52:59.108Z"
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"dateUpdated": "2026-08-05T08:52:59.108Z"
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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/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte\n\nWhen adding a rule with 32 destinations, we hit the following out-of-band\naccess issue:\n\n BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70\n\nThis patch fixes the issue by both increasing the allocated buffers to\naccommodate for the needed actions and by checking the number of actions\nto prevent this issue when a rule with too many actions is provided."
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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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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only when installing an mlx5 FDB software-steering flow rule (TC flower offload → mlx5_eswitch_add_offloaded_rule → mlx5_add_flow_rules → mlx5_cmd_dr_create_fte) via local netlink/TC, not by processing remote packets.\nAC:L - A rule with MLX5_MAX_FLOW_FWD_VPORTS (32) mirred destinations—explicitly supported and commonly paired with a flow counter—deterministically overflows the 32-slot fs_dr_actions/actions arrays; the attacker fully controls the rule and needs no race or uncontrollable layout.\nPR:L - Creating the offloaded TC flower rule requires CAP_NET_ADMIN, which is available to an unprivileged user via user+network namespaces (and to containers granted NET_ADMIN on representors in typical switchdev/NFV deployments), scoring PR:L per kernel guidance for tc/CAP_NET_ADMIN.\nUI:N - The attacker installs the multi-destination TC rule themselves; no separate victim action is required beyond the host already running mlx5 eswitch offloads with SMFS.\nS:U - Impact is slab corruption inside the host kernel’s mlx5 steering path under the same OS authority; this is not a VM escape, IOMMU bypass, or other cross-boundary breakout.\nC:H - The bug is a slab out-of-bounds write of an mlx5dr_action pointer past a kcalloc(32) array into adjacent kmalloc slab objects, which is memory corruption leverageable for kernel information disclosure.\nI:H - Out-of-bounds heap writes of kernel pointers corrupt adjacent slab objects and, per kernel guidance, yield arbitrary-write / control-flow hijacking primitives.\nA:H - The commit documents a KASAN slab-out-of-bounds fault in mlx5_cmd_dr_create_fte, and the resulting heap corruption can oops or panic the kernel."
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}
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]
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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/mellanox/mlx5/core/steering/fs_dr.c"
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],
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"versions": [
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{
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"version": "1ffd498901c1134a7cbecf5409e12c064c39cef9",
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"status": "affected",
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"status": "affected",
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}
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},
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{
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"product": "Linux",
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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/mellanox/mlx5/core/steering/fs_dr.c"
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],
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{
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"version": "5.16",
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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": "5.16",
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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": "5.16.12",
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"lessThanOrEqual": "5.16.*",
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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": "5.17",
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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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"versionStartIncluding": "5.16",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/4ad319cdfbe555b4ff67bc608736c46a6930c848"
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},
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{
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"url": "https://git.kernel.org/stable/c/0aec12d97b2036af0946e3d582144739860ac07b"
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}
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],
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"title": "net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte",
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-48932",
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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": "2024-09-10T15:32:46.595523Z"
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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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"dateUpdated": "2024-09-12T17:33:09.982Z"
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} |