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CVE-2024-35811— wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 wifi/brcmfmac 存在释放后重用问题。

CVSS 8.8 · High EPSS 0.35% · P28

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 202c503935042272e2f9e1bb549d5f69a8681169 affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1 affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< bacb8c3ab86dcd760c15903fcee58169bc3026aa affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 8c36205123dc57349b59b4f1a2301eb278cbc731 affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 0b812f706fd7090be74812101114a0e165b36744 affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 190794848e2b9d15de92d502b6ac652806904f5a affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 6678a1e7d896c00030b31491690e8ddc9a90767a affected
e756af5b30b008f6ffcfebf8ad0b477f6f225b62< 0a7591e14a8da794d0b93b5d1c6254ccb23adacb affected
… +12 more rows
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I. Basic Information for CVE-2024-35811

Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
Source: CVE Program / CVE List V5
Vulnerability Description
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]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 wifi/brcmfmac 存在释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e756af5b30b008f6ffcfebf8ad0b477f6f225b62 ~ 202c503935042272e2f9e1bb549d5f69a8681169 -
Linux Linux 3.7 -

II. Public POCs for CVE-2024-35811

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III. Intelligence Information for CVE-2024-35811

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Mailing List Discussions for CVE-2024-35811 (2)

Other References for CVE-2024-35811 (9)

Same Patch Batch · Linux · 2024-05-17 · 135 CVEs total

CVE-2023-52687 9.8 CRITICAL crypto: safexcel - Add error handling for dma_map_sg() calls
CVE-2024-35856 8.8 HIGH Bluetooth: btusb: mediatek: Fix double free of skb in coredump
CVE-2024-35843 8.8 HIGH iommu/vt-d: Use device rbtree in iopf reporting path
CVE-2024-35804 8.8 HIGH KVM: x86: Mark target gfn of emulated atomic instruction as dirty
CVE-2024-27416 8.8 HIGH Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
CVE-2024-27415 8.8 HIGH netfilter: bridge: confirm multicast packets before passing them up the stack
CVE-2024-27404 8.2 HIGH mptcp: fix data races on remote_id
CVE-2023-52669 8.2 HIGH crypto: s390/aes - Fix buffer overread in CTR mode
CVE-2024-35834 8.2 HIGH xsk: recycle buffer in case Rx queue was full
CVE-2024-35789 8.0 HIGH wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes
CVE-2024-35810 7.8 HIGH drm/vmwgfx: Fix the lifetime of the bo cursor memory
CVE-2024-35830 7.8 HIGH media: tc358743: register v4l2 async device only after successful setup
CVE-2024-35827 7.8 HIGH io_uring/net: fix overflow check in io_recvmsg_mshot_prep()
CVE-2023-52662 7.8 HIGH drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node
CVE-2024-35817 7.8 HIGH drm/amdgpu: amdgpu_ttm_gart_bind set gtt bound flag
CVE-2024-35808 7.8 HIGH md/dm-raid: don't call md_reap_sync_thread() directly
CVE-2024-35792 7.8 HIGH crypto: rk3288 - Fix use after free in unprepare
CVE-2024-35793 7.8 HIGH debugfs: fix wait/cancellation handling during remove
CVE-2024-35798 7.8 HIGH btrfs: fix race in read_extent_buffer_pages()
CVE-2024-35814 7.8 HIGH swiotlb: Fix double-allocation of slots due to broken alignment handling

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-35811

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