CVE-2024-36007 (GCVE-0-2024-36007)

Vulnerability from cvelistv5 – Published: 2024-05-20 09:48 – Updated: 2026-08-05 11:31
VLAI
Title
mlxsw: spectrum_acl_tcam: Fix warning during rehash
Summary
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix warning during rehash As previously explained, the rehash delayed work migrates filters from one region to another. This is done by iterating over all chunks (all the filters with the same priority) in the region and in each chunk iterating over all the filters. When the work runs out of credits it stores the current chunk and entry as markers in the per-work context so that it would know where to resume the migration from the next time the work is scheduled. Upon error, the chunk marker is reset to NULL, but without resetting the entry markers despite being relative to it. This can result in migration being resumed from an entry that does not belong to the chunk being migrated. In turn, this will eventually lead to a chunk being iterated over as if it is an entry. Because of how the two structures happen to be defined, this does not lead to KASAN splats, but to warnings such as [1]. Fix by creating a helper that resets all the markers and call it from all the places the currently only reset the chunk marker. For good measures also call it when starting a completely new rehash. Add a warning to avoid future cases. [1] WARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0 Modules linked in: CPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G W 6.9.0-rc3-custom-00880-g29e61d91b77b #29 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:mlxsw_afk_encode+0x242/0x2f0 [...] Call Trace: <TASK> mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290 mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 </TASK>
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 0b88631855026b55cad901ac28d081e0f358e596 (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 1d76bd2a0034d0d08045c1c6adf2235d88982952 (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 039992b6d2df097c65f480dcf269de3d2656f573 (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 751d352858108314efd33dddd5a9a2b6bf7d6916 (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < e890456051fe8c57944b911defb3e6de91315861 (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 17e9e0bbae652b9b2049e51699e93dfa60b2988d (git)
Affected: 6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf , < 743edc8547a92b6192aa1f1b6bb78233fa21dc9b (git)
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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)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.1 (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.1 (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum_acl_tcam: Fix warning during rehash\n\nAs previously explained, the rehash delayed work migrates filters from\none region to another. This is done by iterating over all chunks (all\nthe filters with the same priority) in the region and in each chunk\niterating over all the filters.\n\nWhen the work runs out of credits it stores the current chunk and entry\nas markers in the per-work context so that it would know where to resume\nthe migration from the next time the work is scheduled.\n\nUpon error, the chunk marker is reset to NULL, but without resetting the\nentry markers despite being relative to it. This can result in migration\nbeing resumed from an entry that does not belong to the chunk being\nmigrated. In turn, this will eventually lead to a chunk being iterated\nover as if it is an entry. Because of how the two structures happen to\nbe defined, this does not lead to KASAN splats, but to warnings such as\n[1].\n\nFix by creating a helper that resets all the markers and call it from\nall the places the currently only reset the chunk marker. For good\nmeasures also call it when starting a completely new rehash. Add a\nwarning to avoid future cases.\n\n[1]\nWARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0\nModules linked in:\nCPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G        W          6.9.0-rc3-custom-00880-g29e61d91b77b #29\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\nRIP: 0010:mlxsw_afk_encode+0x242/0x2f0\n[...]\nCall Trace:\n \u003cTASK\u003e\n mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0\n mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0\n mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470\n process_one_work+0x151/0x370\n worker_thread+0x2cb/0x3e0\n kthread+0xd0/0x100\n ret_from_fork+0x34/0x50\n \u003c/TASK\u003e"
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              "value": "AV:L - The vulnerability is reached by installing and removing tc flower filters on an mlxsw Spectrum port via rtnetlink, which requires local access to the switch\u0027s control plane. There is no path to trigger the rehash migration from received network packets.\nAC:L - The attacker controls both sides of the timing window \u2014 installing more than MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS (100) rules deterministically forces the periodic rehash work to be interrupted with a stale start_ventry, and then adding or deleting a rule at a lower priority creates a vchunk that sorts ahead of it, guaranteeing the marker mismatch. The 5-second rehash interval and unlimited retries make this reliably reproducible.\nPR:L - tc filter installation is gated only by netlink_net_capable(CAP_NET_ADMIN) checked against the network namespace\u0027s user_ns, and mlxsw ports do not set NETIF_F_NETNS_LOCAL, so a switch port delegated into a container/tenant netns lets an otherwise unprivileged user with a user namespace reach this path. No real root in the init namespace is required.\nUI:N - The rehash delayed work runs automatically every 5 seconds by default and the attacker triggers the whole sequence with their own tc filter operations. No action by any other user is needed.\nS:U - The corruption stays within the kernel\u0027s own memory and the switch driver\u0027s data structures, all under the same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The fabricated ventry causes wild reads through confused pointers \u2014 vgroup memory is read as struct mlxsw_sp_acl_rule_info and encoded into TCAM key registers, and entry-\u003echunk-\u003eregion-\u003epriv is walked from a list pointer, exposing kernel memory contents that can be reflected into observable hardware ACL state.\nI:H - This is a type confusion that yields write primitives \u2014 kfree() of an interior offset of another vchunk object corrupts the slab allocator, ventry-\u003eentry = new_entry overwrites an rhashtable chain pointer, and garbage-derived rules are programmed into the switch\u0027s ACL TCAM, corrupting the packet-filtering security control itself.\nA:H - ventry-\u003eentry aliases ht_node.next, which is NULL for the last node in a hash bucket, producing an immediate NULL pointer dereference and oops inside the mlxsw_core workqueue kthread; the resulting slab and rhashtable corruption additionally leads to later panics."
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmlxsw: spectrum_acl_tcam: Fix warning during rehash\\n\\nAs previously explained, the rehash delayed work migrates filters from\\none region to another. This is done by iterating over all chunks (all\\nthe filters with the same priority) in the region and in each chunk\\niterating over all the filters.\\n\\nWhen the work runs out of credits it stores the current chunk and entry\\nas markers in the per-work context so that it would know where to resume\\nthe migration from the next time the work is scheduled.\\n\\nUpon error, the chunk marker is reset to NULL, but without resetting the\\nentry markers despite being relative to it. This can result in migration\\nbeing resumed from an entry that does not belong to the chunk being\\nmigrated. In turn, this will eventually lead to a chunk being iterated\\nover as if it is an entry. Because of how the two structures happen to\\nbe defined, this does not lead to KASAN splats, but to warnings such as\\n[1].\\n\\nFix by creating a helper that resets all the markers and call it from\\nall the places the currently only reset the chunk marker. For good\\nmeasures also call it when starting a completely new rehash. Add a\\nwarning to avoid future cases.\\n\\n[1]\\nWARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0\\nModules linked in:\\nCPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G        W          6.9.0-rc3-custom-00880-g29e61d91b77b #29\\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\\nRIP: 0010:mlxsw_afk_encode+0x242/0x2f0\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0\\n mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0\\n mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290\\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470\\n process_one_work+0x151/0x370\\n worker_thread+0x2cb/0x3e0\\n kthread+0xd0/0x100\\n ret_from_fork+0x34/0x50\\n \u003c/TASK\u003e\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Advertencia de correcci\\u00f3n durante el rehash Como se explic\\u00f3 anteriormente, el trabajo retrasado del rehash migra filtros de una regi\\u00f3n a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la regi\\u00f3n y en cada fragmento iterando sobre todos los filtros. Cuando el trabajo se queda sin cr\\u00e9ditos, almacena el fragmento y la entrada actuales como marcadores en el contexto por trabajo para saber d\\u00f3nde reanudar la migraci\\u00f3n la pr\\u00f3xima vez que se programe el trabajo. En caso de error, el marcador de fragmento se restablece a NULL, pero sin restablecer los marcadores de entrada a pesar de ser relativos a \\u00e9l. Esto puede provocar que la migraci\\u00f3n se reanude desde una entrada que no pertenece al fragmento que se est\\u00e1 migrando. A su vez, esto eventualmente conducir\\u00e1 a que se repita un fragmento como si fuera una entrada. Debido a c\\u00f3mo se definen las dos estructuras, esto no genera s\\u00edmbolos KASAN, sino advertencias como [1]. Para solucionarlo, cree un asistente que restablezca todos los marcadores y ll\\u00e1melo desde todos los lugares donde actualmente solo restablece el marcador de fragmentos. Por si acaso, ll\\u00e1melo tambi\\u00e9n al iniciar un rehash completamente nuevo. Agregue una advertencia para evitar casos futuros. [1] ADVERTENCIA: CPU: 7 PID: 1076 en drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0 M\\u00f3dulos vinculados en: CPU: 7 PID: 1076 Comm: kworker/7:24 Tainted : GW 6.9.0-rc3-custom-00880-g29e61d91b77b #29 Nombre del hardware: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 06/01/2019 Cola de trabajo: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP 0010:mlxsw_af k_encode+0x242/0x2f0 [... ] Seguimiento de llamadas:  mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290 mlxsw_sp_acl_tcam_vregion_rehash_work+0x6 c/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 \"}]",
      "id": "CVE-2024-36007",
      "lastModified": "2024-11-21T09:21:25.123",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-05-20T10:15:14.637",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/039992b6d2df097c65f480dcf269de3d2656f573\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/0b88631855026b55cad901ac28d081e0f358e596\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/17e9e0bbae652b9b2049e51699e93dfa60b2988d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/1d76bd2a0034d0d08045c1c6adf2235d88982952\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/743edc8547a92b6192aa1f1b6bb78233fa21dc9b\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/751d352858108314efd33dddd5a9a2b6bf7d6916\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/e890456051fe8c57944b911defb3e6de91315861\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/039992b6d2df097c65f480dcf269de3d2656f573\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/0b88631855026b55cad901ac28d081e0f358e596\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/17e9e0bbae652b9b2049e51699e93dfa60b2988d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/1d76bd2a0034d0d08045c1c6adf2235d88982952\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/743edc8547a92b6192aa1f1b6bb78233fa21dc9b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/751d352858108314efd33dddd5a9a2b6bf7d6916\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/e890456051fe8c57944b911defb3e6de91315861\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36007\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-20T10:15:14.637\",\"lastModified\":\"2026-08-04T11:18:21.327\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmlxsw: spectrum_acl_tcam: Fix warning during rehash\\n\\nAs previously explained, the rehash delayed work migrates filters from\\none region to another. This is done by iterating over all chunks (all\\nthe filters with the same priority) in the region and in each chunk\\niterating over all the filters.\\n\\nWhen the work runs out of credits it stores the current chunk and entry\\nas markers in the per-work context so that it would know where to resume\\nthe migration from the next time the work is scheduled.\\n\\nUpon error, the chunk marker is reset to NULL, but without resetting the\\nentry markers despite being relative to it. This can result in migration\\nbeing resumed from an entry that does not belong to the chunk being\\nmigrated. In turn, this will eventually lead to a chunk being iterated\\nover as if it is an entry. Because of how the two structures happen to\\nbe defined, this does not lead to KASAN splats, but to warnings such as\\n[1].\\n\\nFix by creating a helper that resets all the markers and call it from\\nall the places the currently only reset the chunk marker. For good\\nmeasures also call it when starting a completely new rehash. Add a\\nwarning to avoid future cases.\\n\\n[1]\\nWARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0\\nModules linked in:\\nCPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G        W          6.9.0-rc3-custom-00880-g29e61d91b77b #29\\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\\nRIP: 0010:mlxsw_afk_encode+0x242/0x2f0\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0\\n mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0\\n mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290\\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470\\n process_one_work+0x151/0x370\\n worker_thread+0x2cb/0x3e0\\n kthread+0xd0/0x100\\n ret_from_fork+0x34/0x50\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Advertencia de correcci\u00f3n durante el rehash Como se explic\u00f3 anteriormente, el trabajo retrasado del rehash migra filtros de una regi\u00f3n a otra. Esto se hace iterando sobre todos los fragmentos (todos los filtros con la misma prioridad) en la regi\u00f3n y en cada fragmento iterando sobre todos los filtros. Cuando el trabajo se queda sin cr\u00e9ditos, almacena el fragmento y la entrada actuales como marcadores en el contexto por trabajo para saber d\u00f3nde reanudar la migraci\u00f3n la pr\u00f3xima vez que se programe el trabajo. En caso de error, el marcador de fragmento se restablece a NULL, pero sin restablecer los marcadores de entrada a pesar de ser relativos a \u00e9l. Esto puede provocar que la migraci\u00f3n se reanude desde una entrada que no pertenece al fragmento que se est\u00e1 migrando. A su vez, esto eventualmente conducir\u00e1 a que se repita un fragmento como si fuera una entrada. Debido a c\u00f3mo se definen las dos estructuras, esto no genera s\u00edmbolos KASAN, sino advertencias como [1]. Para solucionarlo, cree un asistente que restablezca todos los marcadores y ll\u00e1melo desde todos los lugares donde actualmente solo restablece el marcador de fragmentos. Por si acaso, ll\u00e1melo tambi\u00e9n al iniciar un rehash completamente nuevo. Agregue una advertencia para evitar casos futuros. [1] ADVERTENCIA: CPU: 7 PID: 1076 en drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0 M\u00f3dulos vinculados en: CPU: 7 PID: 1076 Comm: kworker/7:24 Tainted : GW 6.9.0-rc3-custom-00880-g29e61d91b77b #29 Nombre del hardware: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 06/01/2019 Cola de trabajo: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP 0010:mlxsw_af k_encode+0x242/0x2f0 [... ] Seguimiento de llamadas:  mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290 mlxsw_sp_acl_tcam_vregion_rehash_work+0x6 c/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"0b88631855026b55cad901ac28d081e0f358e596\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"1d76bd2a0034d0d08045c1c6adf2235d88982952\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"039992b6d2df097c65f480dcf269de3d2656f573\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"751d352858108314efd33dddd5a9a2b6bf7d6916\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"e890456051fe8c57944b911defb3e6de91315861\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"17e9e0bbae652b9b2049e51699e93dfa60b2988d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\",\"lessThan\":\"743edc8547a92b6192aa1f1b6bb78233fa21dc9b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.275\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.216\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.158\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.90\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.30\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.9\",\"lessThanOrEqual\":\"6.8.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM 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      "product_status:known_not_affected": "22",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mlxsw: spectrum_acl_tcam: Fix warning during rehash",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-36007.json",
      "version": "3"
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      "current_release_date": "2026-07-26T00:05:02Z",
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      "product_status:recommended": "691",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-36007",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-36007.json",
      "version": "115"
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There is no path to trigger the rehash migration from received network packets.\\nAC:L - The attacker controls both sides of the timing window \\u2014 installing more than MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS (100) rules deterministically forces the periodic rehash work to be interrupted with a stale start_ventry, and then adding or deleting a rule at a lower priority creates a vchunk that sorts ahead of it, guaranteeing the marker mismatch. The 5-second rehash interval and unlimited retries make this reliably reproducible.\\nPR:L - tc filter installation is gated only by netlink_net_capable(CAP_NET_ADMIN) checked against the network namespace\u0027s user_ns, and mlxsw ports do not set NETIF_F_NETNS_LOCAL, so a switch port delegated into a container/tenant netns lets an otherwise unprivileged user with a user namespace reach this path. No real root in the init namespace is required.\\nUI:N - The rehash delayed work runs automatically every 5 seconds by default and the attacker triggers the whole sequence with their own tc filter operations. No action by any other user is needed.\\nS:U - The corruption stays within the kernel\u0027s own memory and the switch driver\u0027s data structures, all under the same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\\nC:H - The fabricated ventry causes wild reads through confused pointers \\u2014 vgroup memory is read as struct mlxsw_sp_acl_rule_info and encoded into TCAM key registers, and entry-\u003echunk-\u003eregion-\u003epriv is walked from a list pointer, exposing kernel memory contents that can be reflected into observable hardware ACL state.\\nI:H - This is a type confusion that yields write primitives \\u2014 kfree() of an interior offset of another vchunk object corrupts the slab allocator, ventry-\u003eentry = new_entry overwrites an rhashtable chain pointer, and garbage-derived rules are programmed into the switch\u0027s ACL TCAM, corrupting the packet-filtering security control itself.\\nA:H - ventry-\u003eentry aliases ht_node.next, which is NULL for the last node in a hash bucket, producing an immediate NULL pointer dereference and oops inside the mlxsw_core workqueue kthread; the resulting slab and rhashtable corruption additionally leads to later panics.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"0b88631855026b55cad901ac28d081e0f358e596\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"1d76bd2a0034d0d08045c1c6adf2235d88982952\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"039992b6d2df097c65f480dcf269de3d2656f573\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"751d352858108314efd33dddd5a9a2b6bf7d6916\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"e890456051fe8c57944b911defb3e6de91315861\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"17e9e0bbae652b9b2049e51699e93dfa60b2988d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f9579d4e3021b17b0a4cde6b04a6c94c9575cdf\", \"lessThan\": \"743edc8547a92b6192aa1f1b6bb78233fa21dc9b\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.275\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.216\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.158\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.90\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.30\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0b88631855026b55cad901ac28d081e0f358e596\"}, {\"url\": \"https://git.kernel.org/stable/c/1d76bd2a0034d0d08045c1c6adf2235d88982952\"}, {\"url\": \"https://git.kernel.org/stable/c/039992b6d2df097c65f480dcf269de3d2656f573\"}, {\"url\": \"https://git.kernel.org/stable/c/751d352858108314efd33dddd5a9a2b6bf7d6916\"}, {\"url\": \"https://git.kernel.org/stable/c/e890456051fe8c57944b911defb3e6de91315861\"}, {\"url\": \"https://git.kernel.org/stable/c/17e9e0bbae652b9b2049e51699e93dfa60b2988d\"}, {\"url\": \"https://git.kernel.org/stable/c/743edc8547a92b6192aa1f1b6bb78233fa21dc9b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmlxsw: spectrum_acl_tcam: Fix warning during rehash\\n\\nAs previously explained, the rehash delayed work migrates filters from\\none region to another. This is done by iterating over all chunks (all\\nthe filters with the same priority) in the region and in each chunk\\niterating over all the filters.\\n\\nWhen the work runs out of credits it stores the current chunk and entry\\nas markers in the per-work context so that it would know where to resume\\nthe migration from the next time the work is scheduled.\\n\\nUpon error, the chunk marker is reset to NULL, but without resetting the\\nentry markers despite being relative to it. This can result in migration\\nbeing resumed from an entry that does not belong to the chunk being\\nmigrated. In turn, this will eventually lead to a chunk being iterated\\nover as if it is an entry. Because of how the two structures happen to\\nbe defined, this does not lead to KASAN splats, but to warnings such as\\n[1].\\n\\nFix by creating a helper that resets all the markers and call it from\\nall the places the currently only reset the chunk marker. For good\\nmeasures also call it when starting a completely new rehash. Add a\\nwarning to avoid future cases.\\n\\n[1]\\nWARNING: CPU: 7 PID: 1076 at drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c:407 mlxsw_afk_encode+0x242/0x2f0\\nModules linked in:\\nCPU: 7 PID: 1076 Comm: kworker/7:24 Tainted: G        W          6.9.0-rc3-custom-00880-g29e61d91b77b #29\\nHardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019\\nWorkqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work\\nRIP: 0010:mlxsw_afk_encode+0x242/0x2f0\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n mlxsw_sp_acl_atcam_entry_add+0xd9/0x3c0\\n mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0\\n mlxsw_sp_acl_tcam_vchunk_migrate_all+0x109/0x290\\n mlxsw_sp_acl_tcam_vregion_rehash_work+0x6c/0x470\\n process_one_work+0x151/0x370\\n worker_thread+0x2cb/0x3e0\\n kthread+0xd0/0x100\\n ret_from_fork+0x34/0x50\\n \u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.275\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.216\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.158\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.90\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.30\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.9\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:31:32.799Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-36007\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:31:32.799Z\", \"dateReserved\": \"2024-05-17T13:50:33.151Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-20T09:48:06.947Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.