Medium 5.5Published Jul 19, 2026

CVE-2026-53382media: vidtv: fix NULL pointer dereference in vidtv_mux_push_si

Updated under an hour ago (Oct 26, 2026, 1:20 PM ET)

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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

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before 455bc12e7b73ab5a2dfcb47822e91e772bc6c42e; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before f0f5a1d7056980a0d512456fdb370cfb72bba86a; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before 6df7e16d4f742c80add58995a6e69385b97aa9e6; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before cd923dadefadb9671b5ac341b672ff424d429c39; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before 353d9578951dd38bc9679308f5b618ceed1f20fa; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before f965cf22dda7f512f4922415894c3e528269a4ae; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before b28b12be6e8910489e6800ed93ea4d41dfe19683; from f90cf6079bf67988f8b1ad1ade70fc89d0080905 before 232e4b313ea342672edf8947e067c0de4328405b; and 1 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 5.10 before 5.10.260; from 5.11 before 5.15.211; from 5.16 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.37; from 6.19 before 7.0.14; from 7.1 before 7.1.2	NVD

References

References

https://git.kernel.org/stable/c/455bc12e7b73ab5a2dfcb47822e91e772bc6c42e	patch
https://git.kernel.org/stable/c/f0f5a1d7056980a0d512456fdb370cfb72bba86a	patch
https://git.kernel.org/stable/c/6df7e16d4f742c80add58995a6e69385b97aa9e6	patch
https://git.kernel.org/stable/c/cd923dadefadb9671b5ac341b672ff424d429c39	patch
https://git.kernel.org/stable/c/353d9578951dd38bc9679308f5b618ceed1f20fa	patch
https://git.kernel.org/stable/c/f965cf22dda7f512f4922415894c3e528269a4ae	patch
https://git.kernel.org/stable/c/b28b12be6e8910489e6800ed93ea4d41dfe19683	patch
https://git.kernel.org/stable/c/232e4b313ea342672edf8947e067c0de4328405b	patch
https://git.kernel.org/stable/c/7d8bf3d8f91073f4db347ed3aa6302b56107499c	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.