CVE-2024-35811
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]
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.85-1 |
| debian | bullseye | fixed | 5.10.216-1 |
| debian | forky | fixed | 6.7.12-1 |
| debian | sid | fixed | 6.7.12-1 |
| debian | trixie | fixed | 6.7.12-1 |
| debian | 10.0 | affected | |
| linux-kernel | affected | 4.19.312 |
References
- https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb
- https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744
- https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78
- https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a
- https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169
- https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a
- https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731
- https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1
- https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://www.suse.com/security/cve/CVE-2024-35811.html
- https://security-tracker.debian.org/tracker/CVE-2024-35811
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.