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CVE-2026-90348

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <eb946595a58decdb4cab1b5f3c972ae66f41f1c8, <=6.1.*, <=6.12.*, <e5bc3658da9c8a535e3fa5c0c875b2a456954e81, 5.15.221, <152e894e90716163c646d70f86b3afeb70442783, 5.10.270, 0, 6.1.188, 6.18.52, 3f14b73c38431a6a1ed24de568e18ed89b7082e2, <=5.10.*, <=6.6.*, 6.6.157, 7.2.6, <5.5, <=6.18.*, <4f25071afe9218aaae1c63fbf75e229aa6405319, <045d1bfb72d2631ab9ec74afa491aa788ebb57aa, 5.5, 6.12.110, <=7.2.*, <838cab267ce9a975776e022f25094f8cbe1625d2, <=*, <=5.15.*, <7039825a7479df637c4f5d546cb0e1cec18cd8e1, <fed1f662c9f9fd19eeab6c01966b7b5a33804420, 7.3

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

Gravité et risque d'exploitation

CVE-2026-90348 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.22 %, ce qui la place devant 11.7 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <eb946595a58decdb4cab1b5f3c972ae66f41f1c8, <=6.1.*, <=6.12.*, <e5bc3658da9c8a535e3fa5c0c875b2a456954e81, 5.15.221, <152e894e90716163c646d70f86b3afeb70442783, 5.10.270, 0, 6.1.188, 6.18.52, 3f14b73c38431a6a1ed24de568e18ed89b7082e2, <=5.10.*, <=6.6.*, 6.6.157, 7.2.6, <5.5, <=6.18.*, <4f25071afe9218aaae1c63fbf75e229aa6405319, <045d1bfb72d2631ab9ec74afa491aa788ebb57aa, 5.5, 6.12.110, <=7.2.*, <838cab267ce9a975776e022f25094f8cbe1625d2, <=*, <=5.15.*, <7039825a7479df637c4f5d546cb0e1cec18cd8e1, <fed1f662c9f9fd19eeab6c01966b7b5a33804420, 7.3) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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