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CVE-2026-64438

Vulnérabilité élevée dans Linux (Linux)

CVSS 8.8 · Élevée
EPSS 0.1%
Linux•Linux•Versions : <4.3, <49cd5ac6de8de39a14ead609bb552d372d5602cd, <=6.1.*, 6.18.40, <=6.12.*, 0, <=7.1.*, 7.1.4, <446b4d77599cf1a168573f7fb32a4a6aa4f09219, <51144032248cc4ea22917370565650670b8b4e9b, 6.1.178, <218c2836b3987f3fa1d9eac505462cded0821e4c, <=5.10.*, <=6.6.*, 6.12.97, <6e92b28cd74fa433658efeadf21b9d4b01023d7d, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <277281c10c63791067d24d421f7c43a15faa9096, <5d916c1eae1933511a69bffe243b4ee5d7da399c, 4.3, <f344a369d0380d54c8d6c8d24734a78dd5a89817, <=*, ed8ccaef52fa03fb03cff45b380f72c9f869f273, <=5.15.*, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to per-VF state (struct adf_accel_vf_info). Currently, adf_disable_sriov() destroys per-VF mutexes and frees vf_info without stopping new VF2PF work or waiting for in-flight workers to complete. A concurrently scheduled or already queued worker can then dereference freed memory. This manifests as a use-after-free when KASAN is enabled: BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0 Write of size 8 at addr 0000000000000260 by task kworker/24:2/... Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat] Call Trace: kasan_report+0x119/0x140 mutex_lock+0x76/0xe0 adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat] adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat] adf_iov_send_resp+0x8c/0xe0 [intel_qat] process_one_work+0x6ac/0xfd0 worker_thread+0x4dd/0xd30 kthread+0x326/0x410 ret_from_fork+0x33b/0x670 Add a PF-local flag, vf2pf_disabled, that gates work queueing, worker processing, and interrupt re-enabling during teardown. Set this flag atomically with the hardware interrupt mask inside adf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE cluster MSI-X interrupt and flush the PF response workqueue before tearing down per-VF locks and state so all in-flight work completes before vf_info is destroyed. Introduce adf_enable_all_vf2pf_interrupts() to clear the flag and unmask all VF2PF interrupts under the same lock when SR-IOV is re-enabled. This ensures the software flag and hardware state transition atomically on both the enable and disable paths.

Gravité et risque d'exploitation

CVE-2026-64438 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.14 %, ce qui la place devant 2.6 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <4.3, <49cd5ac6de8de39a14ead609bb552d372d5602cd, <=6.1.*, 6.18.40, <=6.12.*, 0, <=7.1.*, 7.1.4, <446b4d77599cf1a168573f7fb32a4a6aa4f09219, <51144032248cc4ea22917370565650670b8b4e9b, 6.1.178, <218c2836b3987f3fa1d9eac505462cded0821e4c, <=5.10.*, <=6.6.*, 6.12.97, <6e92b28cd74fa433658efeadf21b9d4b01023d7d, <=6.18.*, 5.15.212, 6.6.145, 5.10.261, <277281c10c63791067d24d421f7c43a15faa9096, <5d916c1eae1933511a69bffe243b4ee5d7da399c, 4.3, <f344a369d0380d54c8d6c8d24734a78dd5a89817, <=*, ed8ccaef52fa03fb03cff45b380f72c9f869f273, <=5.15.*, 7.2) 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

Rechercher une autre CVE