CVE-2024-35811
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…
Does this matter?
Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.
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]
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.35% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacbPatch
- https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744Patch
- https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78Patch
- https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5aPatch
- https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169Patch
- https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767aPatch
- https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731Patch
- https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1Patch
- https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aaPatch
- https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacbPatch
- https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744Patch
- https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78Patch
- https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5aPatch
- https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169Patch
- https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767aPatch
- https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731Patch
- https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1Patch
- https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aaPatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.