In the Linux kernel, the following vulnerability has been resolved:
media: vidtv: fix NULL pointer dereference in vidtv_mux_push_si
syzbot reported a general protection fault in
vidtv_psi_ts_psi_write_into [1].
vidtv_mux_get_pid_ctx() can return NULL, but vidtv_mux_push_si() does
not check for this before dereferencing the returned pointer to access
the continuity counter. This leads to a general protection fault when
accessing a near-NULL address.
The root cause is that vidtv_mux_pid_ctx_init() does not check the
return value of vidtv_mux_create_pid_ctx_once() for PMT section PIDs.
If the allocation fails, the PID context is never created, but init
returns success. The subsequent vidtv_mux_push_si() call then gets
NULL from vidtv_mux_get_pid_ctx() and crashes.
Fix both the root cause (add error check in vidtv_mux_pid_ctx_init
for PMT PIDs) and add defensive NULL checks in vidtv_mux_push_si for
all vidtv_mux_get_pid_ctx() calls.
[1]
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Workqueue: events vidtv_mux_tick
RIP: 0010:vidtv_psi_ts_psi_write_into+0x54a/0xbc0 drivers/media/test-drivers/vidtv/vidtv_psi.c:197
Call Trace:
<TASK>
vidtv_psi_table_header_write_into drivers/media/test-drivers/vidtv/vidtv_psi.c:799 [inline]
vidtv_psi_pmt_write_into+0x3b2/0xa70 drivers/media/test-drivers/vidtv/vidtv_psi.c:1231
vidtv_mux_push_si+0x932/0xe80 drivers/media/test-drivers/vidtv/vidtv_mux.c:196
vidtv_mux_tick+0xe9b/0x1480 drivers/media/test-drivers/vidtv/vidtv_mux.c:408
References
Configurations
Configuration 1 (hide)
|
History
29 Jul 2026, 19:31
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/232e4b313ea342672edf8947e067c0de4328405b - Patch | |
| References | () https://git.kernel.org/stable/c/353d9578951dd38bc9679308f5b618ceed1f20fa - Patch | |
| References | () https://git.kernel.org/stable/c/455bc12e7b73ab5a2dfcb47822e91e772bc6c42e - Patch | |
| References | () https://git.kernel.org/stable/c/6df7e16d4f742c80add58995a6e69385b97aa9e6 - Patch | |
| References | () https://git.kernel.org/stable/c/7d8bf3d8f91073f4db347ed3aa6302b56107499c - Patch | |
| References | () https://git.kernel.org/stable/c/b28b12be6e8910489e6800ed93ea4d41dfe19683 - Patch | |
| References | () https://git.kernel.org/stable/c/cd923dadefadb9671b5ac341b672ff424d429c39 - Patch | |
| References | () https://git.kernel.org/stable/c/f0f5a1d7056980a0d512456fdb370cfb72bba86a - Patch | |
| References | () https://git.kernel.org/stable/c/f965cf22dda7f512f4922415894c3e528269a4ae - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
19 Jul 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-19 12:16
Updated : 2026-07-29 19:31
NVD link : CVE-2026-53382
Mitre link : CVE-2026-53382
CVE.ORG link : CVE-2026-53382
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference