8.8

CVE-2026-74533

Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero

hci_conn::iso_data is accessed and modified without lock or RCU.
This leads to a race

    [Task hdev->workqueue]                 	[Task 2]
    iso_recv                                    iso_conn_put(conn)
      conn = LOAD hcon->iso_data                  iso_conn_free(conn)
      iso_conn_hold_unless_zero(conn)               hcon->iso_data = NULL
                                                    kfree(conn)
        kref_get_unless_zero(&conn->ref) /* UAF */

and also to races in iso_conn_add() vs. iso_conn_free().

Fix by adding spinlock hci_conn::proto_lock and using it to guard
hci_conn::iso_data.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version dc26097bdb864a0d5955b9a25e43376ffc1af99b
Version < 876a3e94c70d0859d1dad1c986112d4f0d99eba8
Status affected
Version dc26097bdb864a0d5955b9a25e43376ffc1af99b
Version < af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c
Status affected
Version f53e7489273dc2bb307bf50f319b3762d45534f0
Status affected
Version a58d0f5dac322e16cc75334d000666512341bde5
Status affected
Version 6.11.11
Version < 6.12
Status affected
Version 6.12.2
Version < 6.13
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.13
Status affected
Version 0
Version < 6.13
Status unaffected
Version <= 7.1.*
Version 7.1.8
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.126
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/876a3e94c70d0859d1dad1c986112d4f0d99eba8
https://git.kernel.org/stable/c/af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c