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CVE-2024-40979— 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:ath12k 组件在恢复过程中未能正确处理 QMI 目标内存，可能导致内核崩溃。

CVSS 7.8 · High EPSS 0.30% · P22

影响版本矩阵 8

厂商产品 版本范围状态
Linux Linux d889913205cf7ebda905b1e62c5867ed4e39f6c2< 7e323cb55705398123ae087d4870c44e0424e7c0 affected
d889913205cf7ebda905b1e62c5867ed4e39f6c2< bb50a4e711ff95348ad53641acb1306d89eb4c3a affected
d889913205cf7ebda905b1e62c5867ed4e39f6c2< 303c017821d88ebad887814114d4e5966d320b28 affected
6.3 affected
< 6.3 unaffected
6.6.158≤ 6.6.* unaffected
6.9.7≤ 6.9.* unaffected
6.10≤ * unaffected
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一、 漏洞 CVE-2024-40979 基础信息

漏洞信息
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Vulnerability Title
wifi: ath12k: fix kernel crash during resume
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix kernel crash during resume Currently during resume, QMI target memory is not properly handled, resulting in kernel crash in case DMA remap is not supported: BUG: Bad page state in process kworker/u16:54 pfn:36e80 page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x36e80 page dumped because: nonzero _refcount Call Trace: bad_page free_page_is_bad_report __free_pages_ok __free_pages dma_direct_free dma_free_attrs ath12k_qmi_free_target_mem_chunk ath12k_qmi_msg_mem_request_cb The reason is: Once ath12k module is loaded, firmware sends memory request to host. In case DMA remap not supported, ath12k refuses the first request due to failure in allocating with large segment size: ath12k_pci 0000:04:00.0: qmi firmware request memory request ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 7077888 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 8454144 ath12k_pci 0000:04:00.0: qmi dma allocation failed (7077888 B type 1), will try later with small size ath12k_pci 0000:04:00.0: qmi delays mem_request 2 ath12k_pci 0000:04:00.0: qmi firmware request memory request Later firmware comes back with more but small segments and allocation succeeds: ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 262144 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 524288 ath12k_pci 0000:04:00.0: qmi mem seg type 4 size 65536 ath12k_pci 0000:04:00.0: qmi mem seg type 1 size 524288 Now ath12k is working. If suspend is triggered, firmware will be reloaded during resume. As same as before, firmware requests two large segments at first. In ath12k_qmi_msg_mem_request_cb() segment count and size are assigned: ab->qmi.mem_seg_count == 2 ab->qmi.target_mem[0].size == 7077888 ab->qmi.target_mem[1].size == 8454144 Then allocation failed like before and ath12k_qmi_free_target_mem_chunk() is called to free all allocated segments. Note the first segment is skipped because its v.addr is cleared due to allocation failure: chunk->v.addr = dma_alloc_coherent() Also note that this leaks that segment because it has not been freed. While freeing the second segment, a size of 8454144 is passed to dma_free_coherent(). However remember that this segment is allocated at the first time firmware is loaded, before suspend. So its real size is 524288, much smaller than 8454144. As a result kernel found we are freeing some memory which is in use and thus cras ---truncated---
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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:ath12k 组件在恢复过程中未能正确处理 QMI 目标内存，可能导致内核崩溃。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux d889913205cf7ebda905b1e62c5867ed4e39f6c2 ~ 7e323cb55705398123ae087d4870c44e0424e7c0 -
Linux Linux 6.3 -

二、漏洞 CVE-2024-40979 的公开POC

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三、漏洞 CVE-2024-40979 的情报信息

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CVE-2024-40979 补丁与修复 (1)

CVE-2024-40979 其他参考 (2)

同批安全公告 · Linux · 2024-07-12 · 共 122 条

CVE-2024-40937 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-40983 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-40923 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-40907 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-40999 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-40910 8.8 HIGH Linux kernel 安全漏洞
CVE-2024-40911 8.8 HIGH Linux kernel 安全漏洞
CVE-2024-40941 8.1 HIGH Linux kernel 安全漏洞
CVE-2024-40953 7.9 HIGH Linux kernel 安全漏洞
CVE-2024-40984 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40949 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40991 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-39502 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40989 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40947 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40918 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40986 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40970 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40943 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-40974 7.8 HIGH Linux kernel 安全漏洞

显示前 20 条，共 122 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-40979

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