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CVE-2026-90348— wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump

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.

在 Linux 内核中，已修复以下漏洞： wifi: ath10k: snoc: 对 MSA ramdump 使用 memcpy_fromio() 在 WCN3990/SNOC 上，MSA 区域通过 进行映射。在 arm64 架构上，这种映射并非普通可缓存（Normal-cacheable），因此不允许对未对齐的访问。 使用普通的 复制该区域，而 优化后的 实现会发出宽/未对齐的加载操作。这导致在 收集 devcoredump 时触发对齐错误（FSC=0x21）并引发 Oops： 此 Oops 不仅导致固件 RAM

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1527

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3f14b73c38431a6a1ed24de568e18ed89b7082e2< e5bc3658da9c8a535e3fa5c0c875b2a456954e81 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< fed1f662c9f9fd19eeab6c01966b7b5a33804420 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< 838cab267ce9a975776e022f25094f8cbe1625d2 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< eb946595a58decdb4cab1b5f3c972ae66f41f1c8 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< 152e894e90716163c646d70f86b3afeb70442783 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< 7039825a7479df637c4f5d546cb0e1cec18cd8e1 affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< 045d1bfb72d2631ab9ec74afa491aa788ebb57aa affected
3f14b73c38431a6a1ed24de568e18ed89b7082e2< 4f25071afe9218aaae1c63fbf75e229aa6405319 affected
… +10 more rows
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I. Basic Information for CVE-2026-90348

Vulnerability Information
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Vulnerability Title
wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump On WCN3990/SNOC the MSA region is mapped with devm_memremap(MEMREMAP_WT). On arm64 such a mapping is not Normal-cacheable, so unaligned accesses to it are not permitted. ath10k_msa_dump_memory() copies the region with a plain memcpy(), whose optimized __pi_memcpy_generic implementation issues wide/unaligned loads. This triggers an alignment fault (FSC=0x21) Oops in ath10k_snoc_fw_crashed_dump() while collecting the devcoredump: Unable to handle kernel paging request ... FSC=0x21: alignment fault pc : __pi_memcpy_generic lr : ath10k_snoc_fw_crashed_dump [ath10k_snoc] The Oops both leaves the firmware RAM dump buffer zeroed (no dump is captured) and crashes the kernel, which in turn breaks modem SSR recovery. Use memcpy_fromio(), which only performs accesses that are valid for such a device-memory mapping. The generic memcpy_fromio() implementation aligns the source before issuing word-sized reads and stores the destination with put_unaligned(), so it is also safe for the coherent DMA allocation used on the non-reserved-memory path. ath11k and ath12k use the same pattern when copying target memory into crash dumps, so call it unconditionally here too. The MEMREMAP_WT pointer is a plain void *, so an explicit __iomem cast is needed; use __force to keep sparse happy. Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.3.7.c5-00107-QCAHLSWMTPL-1
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3f14b73c38431a6a1ed24de568e18ed89b7082e2 ~ e5bc3658da9c8a535e3fa5c0c875b2a456954e81 -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-90348

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III. Intelligence Information for CVE-2026-90348

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Patches & Fixes for CVE-2026-90348 (8)

Same Patch Batch · Linux · 2026-09-17 · 602 CVEs total

CVE-2026-90255 Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90238 media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
CVE-2026-90240 iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90239 media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
CVE-2026-90241 iommu/vt-d: Tear down scalable-mode context on probe failure
CVE-2026-90243 iommu/vt-d: Clear Present bit before tearing down copied context entry
CVE-2026-90242 iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
CVE-2026-90244 iommu/dma: Restore locking around msi_page_list
CVE-2026-90245 fbdev: kyro: Validate overlay viewport coordinates
CVE-2026-90246 apparmor: fix integer overflow in verify_tags() bounds check
CVE-2026-90247 bpf: Fix mmap_lock leak in irq_work path
CVE-2026-90248 net/sched: cls_api: fix teardown of an adopted proto on insert-race loss
CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
CVE-2026-90250 bpf, cgroup: Fix storage null-ptr-deref after replacing prog
CVE-2026-90251 Bluetooth: MSFT: validate evt_prefix_len against the response length
CVE-2026-90253 Bluetooth: MGMT: free the mesh send cancel command when it is cancelled
CVE-2026-90252 Bluetooth: MGMT: free the HCI command when it is cancelled
CVE-2026-90254 Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
CVE-2026-90256 Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90268 scsi: sd: Fix error handling in sd_probe() after large pool creation failure

Showing top 20 of 602 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90348

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