CVE-2024-35811 (GCVE-0-2024-35811)

Vulnerability from cvelistv5 – Published: 2024-05-17 13:23 – Updated: 2026-08-05 11:30
VLAI
Title
wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach This is the candidate patch of CVE-2023-47233 : https://nvd.nist.gov/vuln/detail/CVE-2023-47233 In brcm80211 driver,it starts with the following invoking chain to start init a timeout worker: ->brcmf_usb_probe ->brcmf_usb_probe_cb ->brcmf_attach ->brcmf_bus_started ->brcmf_cfg80211_attach ->wl_init_priv ->brcmf_init_escan ->INIT_WORK(&cfg->escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); If we disconnect the USB by hotplug, it will call brcmf_usb_disconnect to make cleanup. The invoking chain is : brcmf_usb_disconnect ->brcmf_usb_disconnect_cb ->brcmf_detach ->brcmf_cfg80211_detach ->kfree(cfg); While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker. Fix it by deleting the timer and canceling the worker in brcmf_cfg80211_detach. [arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/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 15:42 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 202c503935042272e2f9e1bb549d5f69a8681169 (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1 (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < bacb8c3ab86dcd760c15903fcee58169bc3026aa (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 8c36205123dc57349b59b4f1a2301eb278cbc731 (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 0b812f706fd7090be74812101114a0e165b36744 (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 190794848e2b9d15de92d502b6ac652806904f5a (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 6678a1e7d896c00030b31491690e8ddc9a90767a (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 0a7591e14a8da794d0b93b5d1c6254ccb23adacb (git)
Affected: e756af5b30b008f6ffcfebf8ad0b477f6f225b62 , < 0f7352557a35ab7888bc7831411ec8a3cbe20d78 (git)
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Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 4.19.312 , ≤ 4.19.* (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.154 , ≤ 5.15.* (semver)
Unaffected: 6.1.84 , ≤ 6.1.* (semver)
Unaffected: 6.6.24 , ≤ 6.6.* (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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              "value": "AV:A - The vulnerable free/use race is in a WiFi driver and is reached automatically via the firmware-crash recovery path (`brcmf_fw_crashed()` \u2192 `bus_reset` work \u2192 `brcmf_pcie_reset`/`brcmf_sdio_bus_reset` \u2192 `brcmf_detach` \u2192 `brcmf_cfg80211_detach` \u2192 `kfree(cfg)`), while the escan timeout worker fires precisely because the firmware stopped responding mid-scan. An adjacent 802.11 attacker who induces a firmware halt (a well-documented failure mode of Broadcom fullmac firmware when fed malformed frames) while the station is doing its routine background scanning triggers both sides of the race over the air.\nAC:L - The attacker controls both halves of the race \u2014 the stalled scan that guarantees the 10 s escan timer expires and the firmware halt that drives the detach \u2014 and the window is wide because the worker blocks in `brcmf_fil_cmd_data_set()` waiting on a dead firmware while `brcmf_cfg80211_detach()` frees `escan_buf` and `cfg` in parallel. The attempt is freely repeatable, and heap grooming of the freed 65000-byte buffer and `cfg` slab is standard.\nPR:N - No local account or capability is needed on the affected system: the scan is issued by the normal background supplicant/NetworkManager activity, and the detach is performed autonomously by the driver\u0027s bus-reset recovery worker in response to a firmware halt. The originally reported USB-hotplug variant likewise requires no privileges.\nUI:N - Background scanning by wpa_supplicant/NetworkManager is continuous and automatic, and the `brcmf_fw_crashed()` \u2192 bus-reset \u2192 detach sequence runs entirely inside the kernel without any user action. No victim interaction is required at any point.\nS:U - The use-after-free corrupts kernel heap objects and is exploited within the kernel\u0027s own security authority, with no crossing of a hypervisor, IOMMU, or sandbox boundary. Impact remains confined to the kernel that owns the vulnerable component.\nC:H - After the free, `brcmf_inform_bss()` walks the dangling `escan_info.escan_buf` with a length/count taken from reallocated memory, giving controlled out-of-bounds reads, and `brcmf_inform_single_bss()` hands the resulting `notify_ie`/`notify_ielen` to `cfg80211_inform_bss_data()`, which copies that kernel memory into a BSS entry retrievable by userspace via nl80211. This is an arbitrary kernel-memory read with a direct exfiltration channel.\nI:H - The worker performs an indirect call through `cfg-\u003ed11inf.decchspec`, a function pointer loaded from the freed `cfg` object, giving control-flow hijack once the slab is reallocated with attacker-controlled data, and it also writes into freed memory (`bi-\u003ectl_ch`, `cfg-\u003escan_request = NULL`, `timer_delete_sync()` on a freed `timer_list`). Combined with the stale `ifp` and `scan_request` passed into further kernel calls, this yields write and code-execution primitives.\nA:H - Even without full exploitation, dereferencing the freed `cfg`, freed `escan_buf`, and freed `brcmf_if`, and running `timer_delete_sync()`/`cfg80211_scan_done()` on freed structures, reliably produces oopses, slab corruption, and kernel panic. The WiFi interface is destroyed and the system crashes."
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      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"3.7\", \"versionEndExcluding\": \"4.19.312\", \"matchCriteriaId\": \"48A978A1-082D-4FD8-B0A8-15D857F7935B\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"4.20\", \"versionEndExcluding\": \"5.4.274\", \"matchCriteriaId\": \"F45A0F3C-C16D-49C4-86D6-D021C3D4B834\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.5\", \"versionEndExcluding\": \"5.10.215\", \"matchCriteriaId\": \"9CD5894E-58E9-4B4A-B0F4-3E6BC134B8F5\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.11\", \"versionEndExcluding\": \"5.15.154\", \"matchCriteriaId\": \"577E212E-7E95-4A71-9B5C-F1D1A3AFFF46\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"5.16\", \"versionEndExcluding\": \"6.1.84\", \"matchCriteriaId\": \"834D9BD5-42A6-4D74-979E-4D6D93F630FD\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.2\", \"versionEndExcluding\": \"6.6.24\", \"matchCriteriaId\": \"8018C1D0-0A5F-48D0-BC72-A2B33FDDA693\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.7\", \"versionEndExcluding\": \"6.7.12\", \"matchCriteriaId\": \"6BE9771A-BAFD-4624-95F9-58D536540C53\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.8\", \"versionEndExcluding\": \"6.8.3\", \"matchCriteriaId\": \"4C59BBC3-6495-4A77-9C82-55EC7CDF5E02\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach\\n\\nThis is the candidate patch of CVE-2023-47233 :\\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-47233\\n\\nIn brcm80211 driver,it starts with the following invoking chain\\nto start init a timeout worker:\\n\\n-\u003ebrcmf_usb_probe\\n  -\u003ebrcmf_usb_probe_cb\\n    -\u003ebrcmf_attach\\n      -\u003ebrcmf_bus_started\\n        -\u003ebrcmf_cfg80211_attach\\n          -\u003ewl_init_priv\\n            -\u003ebrcmf_init_escan\\n              -\u003eINIT_WORK(\u0026cfg-\u003eescan_timeout_work,\\n\\t\\t  brcmf_cfg80211_escan_timeout_worker);\\n\\nIf we disconnect the USB by hotplug, it will call\\nbrcmf_usb_disconnect to make cleanup. The invoking chain is :\\n\\nbrcmf_usb_disconnect\\n  -\u003ebrcmf_usb_disconnect_cb\\n    -\u003ebrcmf_detach\\n      -\u003ebrcmf_cfg80211_detach\\n        -\u003ekfree(cfg);\\n\\nWhile the timeout woker may still be running. This will cause\\na use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker.\\n\\nFix it by deleting the timer and canceling the worker in\\nbrcmf_cfg80211_detach.\\n\\n[arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: brcmfmac: corregido el error de use after free en brcmf_cfg80211_detach Este es el parche candidato de CVE-2023-47233: https://nvd.nist.gov/vuln/detail /CVE-2023-47233 En el controlador brcm80211, comienza con la siguiente cadena de invocaci\\u00f3n para iniciar un trabajador de tiempo de espera: -\u0026gt;brcmf_usb_probe -\u0026gt;brcmf_usb_probe_cb -\u0026gt;brcmf_attach -\u0026gt;brcmf_bus_started -\u0026gt;brcmf_cfg80211_attach -\u0026gt;wl_init_priv -\u0026gt;brcmf_init_escan -\u0026gt;INIT_WORK(\u0026amp;cfg -\u0026gt;escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); Si desconectamos el USB mediante hotplug, llamar\\u00e1 a brcmf_usb_disconnect para realizar la limpieza. La cadena de invocaci\\u00f3n es: brcmf_usb_disconnect -\u0026gt;brcmf_usb_disconnect_cb -\u0026gt;brcmf_detach -\u0026gt;brcmf_cfg80211_detach -\u0026gt;kfree(cfg); Mientras que el activador de tiempo de espera a\\u00fan puede estar ejecut\\u00e1ndose. Esto provocar\\u00e1 un error de use after free en cfg en brcmf_cfg80211_escan_timeout_worker. Soluci\\u00f3nelo eliminando el temporizador y cancelando el trabajador en brcmf_cfg80211_detach. [arend.vanspriel@broadcom.com: mantenga la eliminaci\\u00f3n del temporizador tal como est\\u00e1 y cancele el trabajo justo antes de liberarlo]\"}]",
      "id": "CVE-2024-35811",
      "lastModified": "2025-01-14T14:23:38.660",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"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": "2024-05-17T14:15:15.177",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35811\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-17T14:15:15.177\",\"lastModified\":\"2026-08-04T11:17:55.300\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach\\n\\nThis is the candidate patch of CVE-2023-47233 :\\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-47233\\n\\nIn brcm80211 driver,it starts with the following invoking chain\\nto start init a timeout worker:\\n\\n-\u003ebrcmf_usb_probe\\n  -\u003ebrcmf_usb_probe_cb\\n    -\u003ebrcmf_attach\\n      -\u003ebrcmf_bus_started\\n        -\u003ebrcmf_cfg80211_attach\\n          -\u003ewl_init_priv\\n            -\u003ebrcmf_init_escan\\n              -\u003eINIT_WORK(\u0026cfg-\u003eescan_timeout_work,\\n\\t\\t  brcmf_cfg80211_escan_timeout_worker);\\n\\nIf we disconnect the USB by hotplug, it will call\\nbrcmf_usb_disconnect to make cleanup. The invoking chain is :\\n\\nbrcmf_usb_disconnect\\n  -\u003ebrcmf_usb_disconnect_cb\\n    -\u003ebrcmf_detach\\n      -\u003ebrcmf_cfg80211_detach\\n        -\u003ekfree(cfg);\\n\\nWhile the timeout woker may still be running. This will cause\\na use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker.\\n\\nFix it by deleting the timer and canceling the worker in\\nbrcmf_cfg80211_detach.\\n\\n[arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: brcmfmac: corregido el error de use after free en brcmf_cfg80211_detach Este es el parche candidato de CVE-2023-47233: https://nvd.nist.gov/vuln/detail /CVE-2023-47233 En el controlador brcm80211, comienza con la siguiente cadena de invocaci\u00f3n para iniciar un trabajador de tiempo de espera: -\u0026gt;brcmf_usb_probe -\u0026gt;brcmf_usb_probe_cb -\u0026gt;brcmf_attach -\u0026gt;brcmf_bus_started -\u0026gt;brcmf_cfg80211_attach -\u0026gt;wl_init_priv -\u0026gt;brcmf_init_escan -\u0026gt;INIT_WORK(\u0026amp;cfg -\u0026gt;escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); Si desconectamos el USB mediante hotplug, llamar\u00e1 a brcmf_usb_disconnect para realizar la limpieza. La cadena de invocaci\u00f3n es: brcmf_usb_disconnect -\u0026gt;brcmf_usb_disconnect_cb -\u0026gt;brcmf_detach -\u0026gt;brcmf_cfg80211_detach -\u0026gt;kfree(cfg); Mientras que el activador de tiempo de espera a\u00fan puede estar ejecut\u00e1ndose. Esto provocar\u00e1 un error de use after free en cfg en brcmf_cfg80211_escan_timeout_worker. Soluci\u00f3nelo eliminando el temporizador y cancelando el trabajador en brcmf_cfg80211_detach. [arend.vanspriel@broadcom.com: mantenga la eliminaci\u00f3n del temporizador tal como est\u00e1 y cancele el trabajo justo antes de liberarlo]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"202c503935042272e2f9e1bb549d5f69a8681169\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"bacb8c3ab86dcd760c15903fcee58169bc3026aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"8c36205123dc57349b59b4f1a2301eb278cbc731\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"0b812f706fd7090be74812101114a0e165b36744\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"190794848e2b9d15de92d502b6ac652806904f5a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"6678a1e7d896c00030b31491690e8ddc9a90767a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"0a7591e14a8da794d0b93b5d1c6254ccb23adacb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\",\"lessThan\":\"0f7352557a35ab7888bc7831411ec8a3cbe20d78\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.312\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.274\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.215\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.154\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.84\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.24\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.12\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.3\",\"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\":\"SIMATIC 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    "redhat_vex": {
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      "current_release_date": "2026-08-04T19:07:19+00:00",
      "cve": "CVE-2024-35811",
      "id": "CVE-2024-35811",
      "initial_release_date": "2024-05-17T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35811.json",
      "version": "3"
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-05T00:59:18Z",
      "cve": "CVE-2024-35811",
      "id": "CVE-2024-35811",
      "initial_release_date": "2024-05-21T02:00:11Z",
      "product_status:known_affected": "48",
      "product_status:known_not_affected": "25",
      "product_status:recommended": "922",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-35811",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-35811.json",
      "version": "80"
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An adjacent 802.11 attacker who induces a firmware halt (a well-documented failure mode of Broadcom fullmac firmware when fed malformed frames) while the station is doing its routine background scanning triggers both sides of the race over the air.\\nAC:L - The attacker controls both halves of the race \\u2014 the stalled scan that guarantees the 10 s escan timer expires and the firmware halt that drives the detach \\u2014 and the window is wide because the worker blocks in `brcmf_fil_cmd_data_set()` waiting on a dead firmware while `brcmf_cfg80211_detach()` frees `escan_buf` and `cfg` in parallel. The attempt is freely repeatable, and heap grooming of the freed 65000-byte buffer and `cfg` slab is standard.\\nPR:N - No local account or capability is needed on the affected system: the scan is issued by the normal background supplicant/NetworkManager activity, and the detach is performed autonomously by the driver\u0027s bus-reset recovery worker in response to a firmware halt. The originally reported USB-hotplug variant likewise requires no privileges.\\nUI:N - Background scanning by wpa_supplicant/NetworkManager is continuous and automatic, and the `brcmf_fw_crashed()` \\u2192 bus-reset \\u2192 detach sequence runs entirely inside the kernel without any user action. No victim interaction is required at any point.\\nS:U - The use-after-free corrupts kernel heap objects and is exploited within the kernel\u0027s own security authority, with no crossing of a hypervisor, IOMMU, or sandbox boundary. Impact remains confined to the kernel that owns the vulnerable component.\\nC:H - After the free, `brcmf_inform_bss()` walks the dangling `escan_info.escan_buf` with a length/count taken from reallocated memory, giving controlled out-of-bounds reads, and `brcmf_inform_single_bss()` hands the resulting `notify_ie`/`notify_ielen` to `cfg80211_inform_bss_data()`, which copies that kernel memory into a BSS entry retrievable by userspace via nl80211. This is an arbitrary kernel-memory read with a direct exfiltration channel.\\nI:H - The worker performs an indirect call through `cfg-\u003ed11inf.decchspec`, a function pointer loaded from the freed `cfg` object, giving control-flow hijack once the slab is reallocated with attacker-controlled data, and it also writes into freed memory (`bi-\u003ectl_ch`, `cfg-\u003escan_request = NULL`, `timer_delete_sync()` on a freed `timer_list`). Combined with the stale `ifp` and `scan_request` passed into further kernel calls, this yields write and code-execution primitives.\\nA:H - Even without full exploitation, dereferencing the freed `cfg`, freed `escan_buf`, and freed `brcmf_if`, and running `timer_delete_sync()`/`cfg80211_scan_done()` on freed structures, reliably produces oopses, slab corruption, and kernel panic. The WiFi interface is destroyed and the system crashes.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\", \"lessThan\": \"202c503935042272e2f9e1bb549d5f69a8681169\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\", \"lessThan\": \"8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\", \"lessThan\": \"bacb8c3ab86dcd760c15903fcee58169bc3026aa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\", \"lessThan\": \"8c36205123dc57349b59b4f1a2301eb278cbc731\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e756af5b30b008f6ffcfebf8ad0b477f6f225b62\", 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\"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.312\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.215\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.154\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.84\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.24\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169\"}, {\"url\": \"https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1\"}, {\"url\": \"https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa\"}, {\"url\": \"https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731\"}, {\"url\": \"https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744\"}, {\"url\": \"https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a\"}, {\"url\": 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-\u003eINIT_WORK(\u0026cfg-\u003eescan_timeout_work,\\n\\t\\t  brcmf_cfg80211_escan_timeout_worker);\\n\\nIf we disconnect the USB by hotplug, it will call\\nbrcmf_usb_disconnect to make cleanup. The invoking chain is :\\n\\nbrcmf_usb_disconnect\\n  -\u003ebrcmf_usb_disconnect_cb\\n    -\u003ebrcmf_detach\\n      -\u003ebrcmf_cfg80211_detach\\n        -\u003ekfree(cfg);\\n\\nWhile the timeout woker may still be running. This will cause\\na use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker.\\n\\nFix it by deleting the timer and canceling the worker in\\nbrcmf_cfg80211_detach.\\n\\n[arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.312\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.274\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.215\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.154\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.84\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.24\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.12\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.3\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"3.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:30:05.862Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35811\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:30:05.862Z\", \"dateReserved\": \"2024-05-17T12:19:12.342Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-17T13:23:17.508Z\", \"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.