CVE-2026-99013
- Source
- https://cve.org/CVERecord?id=CVE-2026-99013
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99013.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-99013
- Downstream
BELL (1)
DEBIAN (1)
SUSE (5)
- Related
- Published
- 2026-10-23T12:20:38Z
- Modified
- 2026-11-12T17:29:31Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Bluetooth: ISO: Reject concurrent BIS listener setup
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: Reject concurrent BIS listener setup
iso_sock_listen() drops the socket lock before calling iso_listen_bis() to preserve the hdev->lock ordering. Two concurrent listen() calls on the same broadcast socket can therefore both observe BT_BOUND. Caller A can attach connA and release the locks, then caller B can acquire them and attach connB before A publishes BT_LISTEN.
__iso_chan_add() checks whether connB already has a socket, but not whether the socket already has a connection. The second attachment overwrites iso_pi(sk)->conn, leaking the connA reference and leaving connA->sk intact. Socket teardown follows connB, so later events on connA can cause a stale socket access.
Recheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking both the HCI device and socket locks in iso_listen_bis(). The connection check also covers the interval between attachment and publication of BT_LISTEN. Reject a competing setup with -EBADFD through the existing unlock path before allocating another connection.
A recorded KASAN report from an instrumented kernel shows:
BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0 Call Trace: iso_sock_hold+0x119/0x1f0 iso_conn_del+0xe4/0x270 hci_disconn_complete_evt+0x351/0x8c0 hci_event_packet+0x71b/0xb20 hci_rx_work+0x293/0x730
Allocated by task 93: sk_prot_alloc+0x113/0x220 sk_alloc+0x2b/0x6d0 bt_sock_alloc+0x29/0x370 iso_sock_alloc.constprop.0+0x19/0x300 iso_sock_create+0x94/0x100
Freed by task 93: kfree+0x121/0x3c0 __sk_destruct+0x42b/0x540 iso_sock_release+0x29d/0x340 __sock_release+0xa1/0x260 sock_close+0x10/0x20
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99013.json" }- References
-
- https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3
- https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef
- https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc
- https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99013.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-99013
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedc541d7b5e17987ed330798b07d4ad508859c1c93Fixed559e4d2b6f83aaa96061659cc7104b7a0293f9ef
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced168e28305b871d8ec604a8f51f35467b8d7ba05bFixed90b744066ca520d1a6a505a11ade9c9a5f48accfFixed79993e9919a87068183ba3622c383f05c049c4bcFixed555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.6Fixed6.12.113