CVE-2024-35854

Kernel crash via premature TCAM region destruction

Published May 17, 2024 · Updated Aug 5, 2026

Use-after-free in affected Linux kernel versions allows local users to crash the system during mlxsw ACL TCAM region rehash. The mlxsw_sp_acl_tcam_vregion_rehash_work worker treats non-negative credits as completion and destroys the source region even after migration fails, leaving filters with stale references. Reaching the fault requires Mellanox Spectrum switch hardware, low-privileged network-administration access, and a failed ACL filter migration; stale kernel access can compromise confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux kernel versions allows local users to crash the system during mlxsw ACL TCAM region rehash. The mlxsw_sp_acl_tcam_vregion_rehash_work worker treats non-negative credits as completion and destroys the source region even after migration fails, leaving filters with stale references. Reaching the fault requires Mellanox Spectrum switch hardware, low-privileged network-administration access, and a failed ACL filter migration; stale kernel access can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2024-35854
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1
  2. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <311eeaa7b9e26aba5b3d57b09859f07d8e9fc049
  3. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <4c89642ca47fb620914780c7c51d8d1248201121
  4. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <54225988889931467a9b55fdbef534079b665519
  5. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <813e2ab753a8f8c243a39ede20c2e0adc15f3887
  6. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <a02687044e124f8ccb427cd3632124a4e1a7d7c1
  7. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <a429a912d6c779807f4d72a6cc0a1efaaa3613e1
  8. Affected versionversion=c9c9af91f1d9a636aecc55302c792538e549a430 <e118e7ea24d1392878ef85926627c6bc640c4388

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=c9c9af91f1d9a636aecc55302c792538e549a430 <311eeaa7b9e26aba5b3d57b09859f07d8e9fc049; version=c9c9af91f1d9a636aecc55302c792538e549a430 <4c89642ca47fb620914780c7c51d8d1248201121; version=c9c9af91f1d9a636aecc55302c792538e549a430 <54225988889931467a9b55fdbef534079b665519; version=c9c9af91f1d9a636aecc55302c792538e549a430 <813e2ab753a8f8c243a39ede20c2e0adc15f3887; version=c9c9af91f1d9a636aecc55302c792538e549a430 <a02687044e124f8ccb427cd3632124a4e1a7d7c1; version=c9c9af91f1d9a636aecc55302c792538e549a430 <a429a912d6c779807f4d72a6cc0a1efaaa3613e1; version=c9c9af91f1d9a636aecc55302c792538e549a430 <e118e7ea24d1392878ef85926627c6bc640c4388
The Linux Kernel Organization · Linux Kernelversion=5.1; version=c9c9af91f1d9

Published CVSS scores

7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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