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CVE Record

CVE-2024-35835: net/mlx5e: fix a double-free in arfs_create_groups

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: fix a double-free in arfs_create_groups When `in` allocated by kvzalloc fails, arfs_create_groups will free ft->g and return an error. However, arfs_create_table, the only caller of arfs_create_groups, will hold this error and call to mlx5e_destroy_flow_table, in which the ft->g will be freed again.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux networking error can free the same kernel memory twice when an allocation fails. This may crash a system or corrupt privileged kernel memory. The supplied CVSS 3.1 assessment is 7.8 High and indicates that a low-privileged local attacker may be able to affect confidentiality, integrity, and availability.

Executive priority

Treat this as a high-priority kernel maintenance issue, especially on multi-user or high-value systems using mlx5e. Apply supported vendor updates promptly, but the supplied evidence does not justify declaring an exploitation emergency. Validate vendor backports because upstream version numbers alone may misclassify distribution kernels.

Technical view

In mlx5e adaptive receive flow steering, arfs_create_groups frees ft->g after kvzalloc fails. Its sole caller then passes the error to mlx5e_destroy_flow_table, which frees ft->g again. The referenced Linux stable commits correct this double-free error path.

Likely exposure

Exposure is most relevant to Linux hosts running affected kernel builds where the mlx5e networking path is present. The bundle lists affected releases from 4.7 through several stable branches and 6.8, but does not clearly express every branch boundary. Confirm exposure against the running distribution kernel and its vendor backport history.

Exploitation context

The CVSS vector describes local, low-complexity exploitation requiring low privileges and no user interaction. CISA KEV status is false, and no supplied source reports active exploitation or a public exploit. The allocation-failure condition may constrain practical triggering; the sources do not establish exploit reliability.

Researcher notes

The defect is an error-path ownership failure: arfs_create_groups releases ft->g, while caller cleanup assumes ownership remains and releases it again. Analysis should focus on branch-specific fix inclusion and reachability of the allocation-failure path. The bundle provides no CWE, exploit telemetry, proof of code execution, or complete normalized affected-version ranges.

Mitigation direction

  • Install a supported vendor kernel containing the applicable referenced Linux stable fix.
  • Reboot affected hosts into the updated kernel after following vendor guidance.
  • Until updated, restrict untrusted local access on systems using mlx5e networking.
  • Prioritize internet-facing, multi-user, and high-value hosts where local footholds have greater consequences.

Validation and detection

  • Inventory running kernel versions and distribution package revisions across Linux hosts.
  • Identify systems loading mlx5e and using the affected networking functionality.
  • Verify vendor changelogs or source history include the applicable referenced stable commit.
  • After remediation, confirm each host booted the updated kernel and retired vulnerable builds.
  • Review kernel logs for unexplained memory corruption, crashes, or mlx5e-related faults.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-35835 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
3Timeline events
2ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-35835Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5c, 1cabe6b0965ec067ac60e8f182f16d479a3b9a5cunaffected
LinuxLinux4.7, 0, 4.19.307, 5.4.269, 5.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3, 6.8affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.