CVE-2023-54038

Not scored yetLast modified Jun 17, 2026

Description

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

Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link

hci_connect_sco currently returns NULL when there is no link (i.e. when hci_conn_link() returns NULL).

sco_connect() expects an ERR_PTR in case of any error (see line 266 in sco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which tries to get hcon->hdev, resulting in dereferencing a NULL pointer as reported by syzkaller.

The same issue exists for iso_connect_cis() calling hci_connect_cis().

Thus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR instead of NULL.

Metrics

No CVSS score has been published yet.

Affected software

No affected versions have been published.

Timeline

Published
Dec 24, 2025
Last modified
Jun 17, 2026
NVD status
Deferred

Related CVEs from 2023

CVE-2023-54039In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access In CVE-2023-54048.1Server receiving a malformed message can cause a pointer to be overwritten which can result in a remote code execution or failure. See HoneyCVE-2023-540408.8In the Linux kernel, the following vulnerability has been resolved: ice: fix wrong fallback logic for FDIR When adding a FDIR filter, if iCVE-2023-54041In the Linux kernel, the following vulnerability has been resolved: io_uring: fix memory leak when removing provided buffers When removingCVE-2023-540427.8In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix VAS mm use after free The refcount on mm is dropped bCVE-2023-540438.8In the Linux kernel, the following vulnerability has been resolved: iommufd: Do not add the same hwpt to the ioas->hwpt_list twice The hwpCVE-2023-54044In the Linux kernel, the following vulnerability has been resolved: spmi: Add a check for remove callback when removing a SPMI driver WhenCVE-2023-54045In the Linux kernel, the following vulnerability has been resolved: audit: fix possible soft lockup in __audit_inode_child() Tracefs or deCVE-2023-540467.8In the Linux kernel, the following vulnerability has been resolved: crypto: essiv - Handle EBUSY correctly As it is essiv only handles theCVE-2023-54047In the Linux kernel, the following vulnerability has been resolved: drm/rockchip: dw_hdmi: cleanup drm encoder during unbind This fixes a CVE-2023-540487.8In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Prevent handling any completions after qp destroy HW mayCVE-2023-54049In the Linux kernel, the following vulnerability has been resolved: rpmsg: glink: Add check for kstrdup Add check for the return value of
CVE-2023-54038: Unscored | Vulnix