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CVE-2026-64573

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <4fcfb5b2c736785464ff9745f94c6726c5ee2d85, 6.9, <=6.1.*, <=6.12.*, <c90164ca0f7036942ba088eb7ea8d3f6c2352020, 6.12.101, 1caceadfb50432dbf6d808796cb6c34ebb6d662c, <a087ed960fce54e9302796229e9d545bbc9bcd4a, 0, <6.6.148, <5.15.216, 6.1.91, <a7ee11441d71ab036a705d110a415421f5a4a898, <=7.1.*, <59fd2f075bca94f030c7c78e94878ea0803d7690, 6.8.10, 5.15.216, 02f05ed44b71152d5e11d29be28aed91c0489b4e, <=6.6.*, 6.18.42, 7.1.6, <6.1.183, 6.1.183, 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, <=6.18.*, 6.6.31, ed53949cc92e28aaa3463d246942bda1fbb7f307, <70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24, <=*, <=5.15.*, 5.15.159, <5d34e537755d2f9eba2d4e54d70126f987ef20b4, 427281f9498ed614f9aabc80e46ec077c487da6d, <6.9, 6.6.148, 7.2

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: qca: fix NVM tag length underflow in TLV parser In the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is "while (idx < length - sizeof(struct tlv_type_nvm))". "length" is a signed int from the firmware TLV header and sizeof(struct tlv_type_nvm) is a size_t (12), so "length" is converted to size_t and any firmware-supplied "length" < 12 makes the subtraction wrap to a huge value. The loop body then reads a 12-byte struct tlv_type_nvm past the end of the short vmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it). Rewrite the bound as "idx + sizeof(struct tlv_type_nvm) <= length"; both operands are non-negative, so it no longer underflows and a "length" too small for one record correctly skips the loop. BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421) Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52 Workqueue: hci0 hci_power_on Call Trace: ... kasan_report (mm/kasan/report.c:595) qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617) qca_uart_setup (drivers/bluetooth/btqca.c:948) qca_setup (drivers/bluetooth/hci_qca.c:2029) hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438) hci_dev_open_sync (net/bluetooth/hci_sync.c:5227) hci_power_on (net/bluetooth/hci_core.c:920) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

Gravité et risque d'exploitation

CVE-2026-64573 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 0.16 %, ce qui la place devant 4.9 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <4fcfb5b2c736785464ff9745f94c6726c5ee2d85, 6.9, <=6.1.*, <=6.12.*, <c90164ca0f7036942ba088eb7ea8d3f6c2352020, 6.12.101, 1caceadfb50432dbf6d808796cb6c34ebb6d662c, <a087ed960fce54e9302796229e9d545bbc9bcd4a, 0, <6.6.148, <5.15.216, 6.1.91, <a7ee11441d71ab036a705d110a415421f5a4a898, <=7.1.*, <59fd2f075bca94f030c7c78e94878ea0803d7690, 6.8.10, 5.15.216, 02f05ed44b71152d5e11d29be28aed91c0489b4e, <=6.6.*, 6.18.42, 7.1.6, <6.1.183, 6.1.183, 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d, <=6.18.*, 6.6.31, ed53949cc92e28aaa3463d246942bda1fbb7f307, <70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24, <=*, <=5.15.*, 5.15.159, <5d34e537755d2f9eba2d4e54d70126f987ef20b4, 427281f9498ed614f9aabc80e46ec077c487da6d, <6.9, 6.6.148, 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

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