CVE-2026-64586— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于brcmfmac驱动在设备移除时未排空bus_reset工作项，可能导致释放后重用。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 4684997d9eea29380000e062755aa6d368d789a3< 9dfb09cb0abbf92a06f93e0715e163aa188a84da |
affected |
4684997d9eea29380000e062755aa6d368d789a3< 4824e3bcc68f8d678b409039d1bb48c7b5ea73dc |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< 61127dd20920bf28460a1609aabb0dafa2f54fac |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< c268331845ee00dbdbccb000826bb612dff2bee7 |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< e3815d1ffbb9be4f1605ddc3b427557893461683 |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< 02d378828af8bb74f6c2f4d2bee3c77cf16c861e |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< 177a25be1195f8bdc6160ba5f1a5699f7041c985 |
affected | ||
4684997d9eea29380000e062755aa6d368d789a3< 43b25879f004c98defa2776bedc6ca4763c51945 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-64586 基础信息
漏洞信息
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Vulnerability Title
wifi: brcmfmac: drain bus_reset work on device removal
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: drain bus_reset work on device removal
brcmf_fw_crashed() and the debugfs "reset" entry both schedule
drvr->bus_reset, whose callback recovers drvr through container_of()
and dereferences it. The removal path frees drvr (brcmf_free ->
wiphy_free) without draining the work, so a bus_reset callback pending
or running during removal can outlive drvr.
Cancellation cannot live in brcmf_detach() or brcmf_free(): the work
callback reaches teardown through the bus .reset op (PCIe
brcmf_pcie_reset -> brcmf_detach; SDIO brcmf_sdio_bus_reset ->
brcmf_sdiod_remove -> brcmf_free), so cancelling there would wait for
the running work and deadlock.
Add a per-bus mutex (bus_reset_lock) and route all arming through
brcmf_bus_schedule_reset(), which under the lock skips when the bus is
marked removing. Each bus remove entry calls
brcmf_bus_cancel_reset_work(), which under the same lock sets removing
and cancels the work. Holding the mutex across cancel_work_sync() makes
the set-removing + drain step atomic. Every producer reaches the arming
path from process context -- the PCIe firmware-halt notification runs in
the threaded IRQ handler (brcmf_pcie_isr_thread) and the SDIO hostmail
path runs from the data workqueue -- so the mutex is taken only in
sleepable contexts. Where applicable the remove entry first stops the
firmware-crash producer: on PCIe mask the mailbox and synchronize_irq;
on SDIO unregister the bus interrupt and cancel the data worker, which
also reports firmware halts through brcmf_fw_crashed(). The mutex is
initialized at bus allocation. The SDIO suspend power-off path frees
drvr through the same brcmf_sdiod_remove() and takes the same lock;
resume re-allows the work only on a successful re-probe.
Also guard brcmf_fw_crashed() against a NULL bus_if/drvr: it can fire
before brcmf_attach() wires up drvr, and it dereferences drvr
(bphy_err/brcmf_dev_coredump) before reaching the arming gate.
The bus_reset work is shared across buses, so the drain is applied to
every remove path: PCIe (the .reset op introduced by the Fixes commit),
SDIO (arms the same work through brcmf_fw_crashed()), and USB (via the
debugfs "reset" entry). cancel_work_sync() drains a running or pending
bus_reset work item before removal frees drvr, and patch 1/2 makes the
scratch-buffer release safe when reset teardown has already released
those DMA buffers.
This patch fixes the lifetime of the bus_reset work item itself. It does
not attempt to address the separate, pre-existing lifetime of the
asynchronous firmware completion started by the PCIe reset path. That
callback needs its own lifetime/ownership protocol and is being tracked
separately.
This issue was found by an in-house static analysis tool.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于brcmfmac驱动在设备移除时未排空bus_reset工作项，可能导致释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-64586 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64586 补丁与修复 (8)
同批安全公告 · Linux · 2026-08-06 · 共 22 条
| CVE-2026-64597 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64598 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64584 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64585 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64588 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64583 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64601 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64599 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64587 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-68480 | Linux kernel 安全漏洞 | |
| CVE-2026-64604 | Linux kernel 安全漏洞 | |
| CVE-2026-64603 | Linux kernel 安全漏洞 | |
| CVE-2026-64602 | Linux kernel 安全漏洞 | |
| CVE-2026-64596 | Linux kernel 安全漏洞 | |
| CVE-2026-64595 | Linux kernel 安全漏洞 | |
| CVE-2026-64593 | Linux kernel 安全漏洞 | |
| CVE-2026-64594 | Linux kernel 安全漏洞 | |
| CVE-2026-64592 | Linux kernel 安全漏洞 | |
| CVE-2026-64591 | Linux kernel 安全漏洞 | |
| CVE-2026-64590 | Linux kernel 安全漏洞 |
显示前 20 条，共 22 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-64586
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