--- id: CVE-2024-35811 title: |- 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 brc… 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 brc… severity: high cvss: 8.8 cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-416 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 3.7, < 4.19.312' - 'linux_kernel >= 4.20, < 5.4.274' - 'linux_kernel >= 5.5, < 5.10.215' - 'linux_kernel >= 5.11, < 5.15.154' - 'linux_kernel >= 5.16, < 6.1.84' - 'linux_kernel >= 6.2, < 6.6.24' - 'linux_kernel >= 6.7, < 6.7.12' - 'linux_kernel >= 6.8, < 6.8.3' - debian_linux = 10.0 patched: - linux_kernel 6.8.3 published: '2024-05-17' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:17:47.423' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-35811' references: - url: 'https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35811.json - url: 'https://access.redhat.com/security/cve/CVE-2024-35811' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2281213' - url: 'https://www.cve.org/CVERecord?id=CVE-2024-35811' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-35811' - url: >- https://lore.kernel.org/linux-cve-announce/2024051741-CVE-2024-35811-9306@gregkh/T tags: - nvd - cve.org - csaf - vex - red-hat - score-dispute epss: 0.00353 epssPercentile: 0.288 ingestedAt: '2026-10-15T03:30:12.680Z' ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2024-09-10T15:42:35.275433Z' scores: nvd: 8.8 vendor: 5.5 --- ## Overview 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] ## Affected - `linux_kernel >= 3.7, < 4.19.312` - `linux_kernel >= 4.20, < 5.4.274` - `linux_kernel >= 5.5, < 5.10.215` - `linux_kernel >= 5.11, < 5.15.154` - `linux_kernel >= 5.16, < 6.1.84` - `linux_kernel >= 6.2, < 6.6.24` - `linux_kernel >= 6.7, < 6.7.12` - `linux_kernel >= 6.8, < 6.8.3` - `debian_linux = 10.0` ## Remediation Upgrade past the affected range: - `linux_kernel 6.8.3` ## Vendor advisories - **Red Hat VEX** · Moderate · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35811.json)