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CVE-2024-46689— soc: qcom: cmd-db: Map shared memory as WC, not WB

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，该漏洞源于将共享内存映射为WC而不是WB，可能导致安全中断和信任区域的无限循环。

AI Predicted 5.9 Difficulty: Theoretical EPSS 0.25% · P17

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 312416d9171a1460b7ed8d182b5b540c910ce80d< 0ee9594c974368a17e85a431e9fe1c14fb65c278 affected
312416d9171a1460b7ed8d182b5b540c910ce80d< f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 affected
312416d9171a1460b7ed8d182b5b540c910ce80d< eaff392c1e34fb77cc61505a31b0191e5e46e271 affected
312416d9171a1460b7ed8d182b5b540c910ce80d< d9d48d70e922b272875cda60d2ada89291c840cf affected
312416d9171a1460b7ed8d182b5b540c910ce80d< ef80520be0ff78ae5ed44cb6eee1525e65bebe70 affected
312416d9171a1460b7ed8d182b5b540c910ce80d< 62c2d63605ca25b5db78a347ed303c0a0a77d5b4 affected
312416d9171a1460b7ed8d182b5b540c910ce80d< f9bb896eab221618927ae6a2f1d566567999839d affected
4.18 affected
… +8 more rows
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I. Basic Information for CVE-2024-46689

Vulnerability Information
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Vulnerability Title
soc: qcom: cmd-db: Map shared memory as WC, not WB
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: soc: qcom: cmd-db: Map shared memory as WC, not WB Linux does not write into cmd-db region. This region of memory is write protected by XPU. XPU may sometime falsely detect clean cache eviction as "write" into the write protected region leading to secure interrupt which causes an endless loop somewhere in Trust Zone. The only reason it is working right now is because Qualcomm Hypervisor maps the same region as Non-Cacheable memory in Stage 2 translation tables. The issue manifests if we want to use another hypervisor (like Xen or KVM), which does not know anything about those specific mappings. Changing the mapping of cmd-db memory from MEMREMAP_WB to MEMREMAP_WT/WC removes dependency on correct mappings in Stage 2 tables. This patch fixes the issue by updating the mapping to MEMREMAP_WC. I tested this on SA8155P with Xen.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于将共享内存映射为WC而不是WB，可能导致安全中断和信任区域的无限循环。
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 312416d9171a1460b7ed8d182b5b540c910ce80d ~ 0ee9594c974368a17e85a431e9fe1c14fb65c278 -
Linux Linux 4.18 -

II. Public POCs for CVE-2024-46689

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III. Intelligence Information for CVE-2024-46689

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Same Patch Batch · Linux · 2024-09-13 · 40 CVEs total

CVE-2024-46697 9.8 CRITICAL nfsd: ensure that nfsd4_fattr_args.context is zeroed out
CVE-2024-46695 9.8 CRITICAL selinux,smack: don't bypass permissions check in inode_setsecctx hook
CVE-2024-46696 9.8 CRITICAL nfsd: fix potential UAF in nfsd4_cb_getattr_release
CVE-2024-46690 9.8 CRITICAL nfsd: fix nfsd4_deleg_getattr_conflict in presence of third party lease
CVE-2024-46673 7.8 HIGH scsi: aacraid: Fix double-free on probe failure
CVE-2024-46713 7.8 HIGH perf/aux: Fix AUX buffer serialization
CVE-2024-46710 7.8 HIGH drm/vmwgfx: Prevent unmapping active read buffers
CVE-2024-46709 7.8 HIGH drm/vmwgfx: Fix prime with external buffers
CVE-2024-46705 7.8 HIGH drm/xe: reset mmio mappings with devm
CVE-2024-46687 7.8 HIGH btrfs: fix a use-after-free when hitting errors inside btrfs_submit_chunk()
CVE-2024-46674 7.8 HIGH usb: dwc3: st: fix probed platform device ref count on probe error path
CVE-2024-46680 7.8 HIGH Bluetooth: btnxpuart: Fix random crash seen while removing driver
CVE-2024-46678 7.8 HIGH bonding: change ipsec_lock from spin lock to mutex
CVE-2024-46683 7.8 HIGH drm/xe: prevent UAF around preempt fence
CVE-2024-46679 ethtool: check device is present when getting link settings
CVE-2024-46712 drm/vmwgfx: Disable coherent dumb buffers without 3d
CVE-2024-46711 mptcp: pm: fix ID 0 endp usage after multiple re-creations
CVE-2024-46675 usb: dwc3: core: Prevent USB core invalid event buffer address access
CVE-2024-46708 pinctrl: qcom: x1e80100: Fix special pin offsets
CVE-2024-46676 nfc: pn533: Add poll mod list filling check

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46689

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