Vulnerability-Lookup

GHSA-VPR7-CGQ2-G5RR

Vulnerability from github – Published: 2024-08-22 06:30 – Updated: 2024-08-23 03:30

Details

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte

When adding a rule with 32 destinations, we hit the following out-of-band access issue:

BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70

This patch fixes the issue by both increasing the allocated buffers to accommodate for the needed actions and by checking the number of actions to prevent this issue when a rule with too many actions is provided.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-48932"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-22T04:15:16Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-vpr7-cgq2-g5rr",
  "modified": "2024-08-23T03:30:59Z",
  "published": "2024-08-22T06:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48932"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0aec12d97b2036af0946e3d582144739860ac07b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ad319cdfbe555b4ff67bc608736c46a6930c848"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-48932 (GCVE-0-2022-48932)

Vulnerability from cvelistv5 – Published: 2024-08-22 03:31 – Updated: 2026-08-05 08:52

Title

net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte When adding a rule with 32 destinations, we hit the following out-of-band access issue: BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70 This patch fixes the issue by both increasing the allocated buffers to accommodate for the needed actions and by checking the number of actions to prevent this issue when a rule with too many actions is provided.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:32 UTC

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/4ad319cdfbe555b4f…
https://git.kernel.org/stable/c/0aec12d97b2036af0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1ffd498901c1134a7cbecf5409e12c064c39cef9 , < 4ad319cdfbe555b4ff67bc608736c46a6930c848 (git) Affected: 1ffd498901c1134a7cbecf5409e12c064c39cef9 , < 0aec12d97b2036af0946e3d582144739860ac07b (git)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 5.16.12 , ≤ 5.16.* (semver) Unaffected: 5.17 , ≤ * (original_commit_for_fix)

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                "id": "CVE-2022-48932",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:32:46.595523Z",
                "version": "2.0.3"
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          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"
          ],
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              "versionType": "git"
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        },
        {
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            "drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"
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              "status": "affected",
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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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              "value": "AV:L - The bug is reached only when installing an mlx5 FDB software-steering flow rule (TC flower offload \u2192 mlx5_eswitch_add_offloaded_rule \u2192 mlx5_add_flow_rules \u2192 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\u2014explicitly supported and commonly paired with a flow counter\u2014deterministically 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\u2019s 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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      "title": "net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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