CVE-2024-35852 (GCVE-0-2024-35852)

Vulnerability from cvelistv5 – Published: 2024-05-17 14:47 – Updated: 2026-05-11 20:12
VLAI
Title
mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work
Summary
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work The rehash delayed work is rescheduled with a delay if the number of credits at end of the work is not negative as supposedly it means that the migration ended. Otherwise, it is rescheduled immediately. After "mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash" the above is no longer accurate as a non-negative number of credits is no longer indicative of the migration being done. It can also happen if the work encountered an error in which case the migration will resume the next time the work is scheduled. The significance of the above is that it is possible for the work to be pending and associated with hints that were allocated when the migration started. This leads to the hints being leaked [1] when the work is canceled while pending as part of ACL region dismantle. Fix by freeing the hints if hints are associated with a work that was canceled while pending. Blame the original commit since the reliance on not having a pending work associated with hints is fragile. [1] unreferenced object 0xffff88810e7c3000 (size 256): comm "kworker/0:16", pid 176, jiffies 4295460353 hex dump (first 32 bytes): 00 30 95 11 81 88 ff ff 61 00 00 00 00 00 00 80 .0......a....... 00 00 61 00 40 00 00 00 00 00 00 00 04 00 00 00 ..a.@........... backtrace (crc 2544ddb9): [<00000000cf8cfab3>] kmalloc_trace+0x23f/0x2a0 [<000000004d9a1ad9>] objagg_hints_get+0x42/0x390 [<000000000b143cf3>] mlxsw_sp_acl_erp_rehash_hints_get+0xca/0x400 [<0000000059bdb60a>] mlxsw_sp_acl_tcam_vregion_rehash_work+0x868/0x1160 [<00000000e81fd734>] process_one_work+0x59c/0xf20 [<00000000ceee9e81>] worker_thread+0x799/0x12c0 [<00000000bda6fe39>] kthread+0x246/0x300 [<0000000070056d23>] ret_from_fork+0x34/0x70 [<00000000dea2b93e>] ret_from_fork_asm+0x1a/0x30
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-20 18:41 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < 51cefc9da400b953fee749c9e5d26cd4a2b5d758 (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < 857ed800133ffcfcee28582090b63b0cbb8ba59d (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < 63d814d93c5cce4c18284adc810028f28dca493f (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < 5bfe7bf9656ed2633718388f12b7c38b86414a04 (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < de1aaefa75be9d0ec19c9a3e0e2f9696de20c6ab (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < d72dd6fcd7886d0523afbab8b4a4b22d17addd7d (git)
Affected: c9c9af91f1d9a636aecc55302c792538e549a430 , < fb4e2b70a7194b209fc7320bbf33b375f7114bd5 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.275 , ≤ 5.4.* (semver)
Unaffected: 5.10.216 , ≤ 5.10.* (semver)
Unaffected: 5.15.158 , ≤ 5.15.* (semver)
Unaffected: 6.1.90 , ≤ 6.1.* (semver)
Unaffected: 6.6.30 , ≤ 6.6.* (semver)
Unaffected: 6.8.9 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Corrige p\u00e9rdida de memoria al cancelar trabajo de rehash El trabajo retrasado de rehash se reprograma con retraso si el n\u00famero de cr\u00e9ditos al final del trabajo no es negativo como supuestamente significa que la migraci\u00f3n termin\u00f3. En caso contrario, se reprograma inmediatamente. Despu\u00e9s de \"mlxsw: espectro_acl_tcam: Corregir posible use after free durante la repetici\u00f3n\", lo anterior ya no es exacto ya que una cantidad no negativa de cr\u00e9ditos ya no es indicativo de la migraci\u00f3n que se est\u00e1 realizando. Tambi\u00e9n puede suceder si el trabajo encontr\u00f3 un error, en cuyo caso la migraci\u00f3n se reanudar\u00e1 la pr\u00f3xima vez que se programe el trabajo. La importancia de lo anterior es que es posible que el trabajo est\u00e9 pendiente y asociado con sugerencias que se asignaron cuando comenz\u00f3 la migraci\u00f3n. Esto lleva a que se filtren sugerencias [1] cuando el trabajo se cancela mientras est\u00e1 pendiente como parte del desmantelamiento de la regi\u00f3n ACL. Se soluciona liberando las sugerencias si las sugerencias est\u00e1n asociadas con un trabajo que se cancel\u00f3 mientras estaba pendiente. Culpe al compromiso original, ya que la dependencia de no tener un trabajo pendiente asociado con sugerencias es fr\u00e1gil. [1] objeto sin referencia 0xffff88810e7c3000 (tama\u00f1o 256): comm \"kworker/0:16\", pid 176, jiffies 4295460353 volcado hexadecimal (primeros 32 bytes): 00 30 95 11 81 88 ff ff 61 00 00 00 00 00 80 . 0......a....... 00 00 61 00 40 00 00 00 00 00 00 00 04 00 00 00 ..a.@........... retroceso (crc 2544ddb9): [\u0026lt;00000000cf8cfab3\u0026gt;] kmalloc_trace+0x23f/0x2a0 [\u0026lt;000000004d9a1ad9\u0026gt;] objagg_hints_get+0x42/0x390 [\u0026lt;000000000b143cf3\u0026gt;] 0xca/0x400 [\u0026lt;0000000059bdb60a\u0026gt;] mlxsw_sp_acl_tcam_vregion_rehash_work+0x868/0x1160 [\u0026lt;00000000e81fd734\u0026gt;] proceso_one_work+ 0x59c/0xf20 [\u0026lt;00000000ceee9e81\u0026gt;] work_thread+0x799/0x12c0 [\u0026lt;00000000bda6fe39\u0026gt;] kthread+0x246/0x300 [\u0026lt;0000000070056d23\u0026gt;] ret_from_fork+0x34/0x70 [\u0026lt;0000 0000dea2b93e\u0026gt;] ret_from_fork_asm+0x1a/0x30"
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        "assignerShortName": "Linux",
        "cveId": "CVE-2024-35852",
        "datePublished": "2024-05-17T14:47:29.441Z",
        "dateReserved": "2024-05-17T13:50:33.106Z",
        "dateUpdated": "2024-08-02T03:21:48.279Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.