ghsa-3287-mf6c-3f29
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
media: vidtv: Terminating the subsequent process of initialization failure
syzbot reported a slab-use-after-free Read in vidtv_mux_init. [1]
After PSI initialization fails, the si member is accessed again, resulting in this uaf.
After si initialization fails, the subsequent process needs to be exited.
[1] BUG: KASAN: slab-use-after-free in vidtv_mux_pid_ctx_init drivers/media/test-drivers/vidtv/vidtv_mux.c:78 [inline] BUG: KASAN: slab-use-after-free in vidtv_mux_init+0xac2/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:524 Read of size 8 at addr ffff88802fa42acc by task syz.2.37/6059
CPU: 0 UID: 0 PID: 6059 Comm: syz.2.37 Not tainted 6.14.0-rc5-syzkaller #0 Hardware name: Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xd9/0x110 mm/kasan/report.c:634 vidtv_mux_pid_ctx_init drivers/media/test-drivers/vidtv/vidtv_mux.c:78 vidtv_mux_init+0xac2/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:524 vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 vidtv_start_feed drivers/media/test-drivers/vidtv/vidtv_bridge.c:239 dmx_section_feed_start_filtering drivers/media/dvb-core/dvb_demux.c:973 dvb_dmxdev_feed_start drivers/media/dvb-core/dmxdev.c:508 [inline] dvb_dmxdev_feed_restart.isra.0 drivers/media/dvb-core/dmxdev.c:537 dvb_dmxdev_filter_stop+0x2b4/0x3a0 drivers/media/dvb-core/dmxdev.c:564 dvb_dmxdev_filter_free drivers/media/dvb-core/dmxdev.c:840 [inline] dvb_demux_release+0x92/0x550 drivers/media/dvb-core/dmxdev.c:1246 __fput+0x3ff/0xb70 fs/file_table.c:464 task_work_run+0x14e/0x250 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xad8/0x2d70 kernel/exit.c:938 do_group_exit+0xd3/0x2a0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096 x64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f871d58d169 Code: Unable to access opcode bytes at 0x7f871d58d13f. RSP: 002b:00007fff4b19a788 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f871d58d169 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fff4b19a7ec R08: 0000000b4b19a87f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000000927c0 R14: 000000000001d553 R15: 00007fff4b19a840
Allocated by task 6059: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] vidtv_psi_pat_table_init drivers/media/test-drivers/vidtv/vidtv_psi.c:970 vidtv_channel_si_init drivers/media/test-drivers/vidtv/vidtv_channel.c:423 vidtv_mux_init drivers/media/test-drivers/vidtv/vidtv_mux.c:519 vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 vidtv_start_feed drivers/media/test-drivers/vidtv/vidtv_bridge.c:239 dmx_section_feed_start_filtering drivers/media/dvb-core/dvb_demux.c:973 dvb_dmxdev_feed_start drivers/media/dvb-core/dmxdev.c:508 [inline] dvb_dmxdev_feed_restart.isra.0 drivers/media/dvb-core/dmxdev.c:537 dvb_dmxdev_filter_stop+0x2b4/0x3a0 drivers/media/dvb-core/dmxdev.c:564 dvb_dmxdev_filter_free drivers/media/dvb-core/dmxdev.c:840 [inline] dvb_demux_release+0x92/0x550 drivers/media/dvb-core/dmxdev.c:1246 __fput+0x3ff/0xb70 fs/file_tabl ---truncated---
{
"affected": [],
"aliases": [
"CVE-2025-38227"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-04T14:15:32Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: Terminating the subsequent process of initialization failure\n\nsyzbot reported a slab-use-after-free Read in vidtv_mux_init. [1]\n\nAfter PSI initialization fails, the si member is accessed again, resulting\nin this uaf.\n\nAfter si initialization fails, the subsequent process needs to be exited.\n\n[1]\nBUG: KASAN: slab-use-after-free in vidtv_mux_pid_ctx_init drivers/media/test-drivers/vidtv/vidtv_mux.c:78 [inline]\nBUG: KASAN: slab-use-after-free in vidtv_mux_init+0xac2/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:524\nRead of size 8 at addr ffff88802fa42acc by task syz.2.37/6059\n\nCPU: 0 UID: 0 PID: 6059 Comm: syz.2.37 Not tainted 6.14.0-rc5-syzkaller #0\nHardware name: Google Compute Engine, BIOS Google 02/12/2025\nCall Trace:\n\u003cTASK\u003e\n__dump_stack lib/dump_stack.c:94 [inline]\ndump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\nprint_address_description mm/kasan/report.c:408 [inline]\nprint_report+0xc3/0x670 mm/kasan/report.c:521\nkasan_report+0xd9/0x110 mm/kasan/report.c:634\nvidtv_mux_pid_ctx_init drivers/media/test-drivers/vidtv/vidtv_mux.c:78\nvidtv_mux_init+0xac2/0xbe0 drivers/media/test-drivers/vidtv/vidtv_mux.c:524\nvidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194\nvidtv_start_feed drivers/media/test-drivers/vidtv/vidtv_bridge.c:239\ndmx_section_feed_start_filtering drivers/media/dvb-core/dvb_demux.c:973\ndvb_dmxdev_feed_start drivers/media/dvb-core/dmxdev.c:508 [inline]\ndvb_dmxdev_feed_restart.isra.0 drivers/media/dvb-core/dmxdev.c:537\ndvb_dmxdev_filter_stop+0x2b4/0x3a0 drivers/media/dvb-core/dmxdev.c:564\ndvb_dmxdev_filter_free drivers/media/dvb-core/dmxdev.c:840 [inline]\ndvb_demux_release+0x92/0x550 drivers/media/dvb-core/dmxdev.c:1246\n__fput+0x3ff/0xb70 fs/file_table.c:464\ntask_work_run+0x14e/0x250 kernel/task_work.c:227\nexit_task_work include/linux/task_work.h:40 [inline]\ndo_exit+0xad8/0x2d70 kernel/exit.c:938\ndo_group_exit+0xd3/0x2a0 kernel/exit.c:1087\n__do_sys_exit_group kernel/exit.c:1098 [inline]\n__se_sys_exit_group kernel/exit.c:1096 [inline]\n__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096\nx64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f871d58d169\nCode: Unable to access opcode bytes at 0x7f871d58d13f.\nRSP: 002b:00007fff4b19a788 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f871d58d169\nRDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: 00007fff4b19a7ec R08: 0000000b4b19a87f R09: 00000000000927c0\nR10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000003\nR13: 00000000000927c0 R14: 000000000001d553 R15: 00007fff4b19a840\n \u003c/TASK\u003e\n\nAllocated by task 6059:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:47\n kasan_save_track+0x14/0x30 mm/kasan/common.c:68\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394\n kmalloc_noprof include/linux/slab.h:901 [inline]\n kzalloc_noprof include/linux/slab.h:1037 [inline]\n vidtv_psi_pat_table_init drivers/media/test-drivers/vidtv/vidtv_psi.c:970\n vidtv_channel_si_init drivers/media/test-drivers/vidtv/vidtv_channel.c:423\n vidtv_mux_init drivers/media/test-drivers/vidtv/vidtv_mux.c:519\n vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194\n vidtv_start_feed drivers/media/test-drivers/vidtv/vidtv_bridge.c:239\n dmx_section_feed_start_filtering drivers/media/dvb-core/dvb_demux.c:973\n dvb_dmxdev_feed_start drivers/media/dvb-core/dmxdev.c:508 [inline]\n dvb_dmxdev_feed_restart.isra.0 drivers/media/dvb-core/dmxdev.c:537\n dvb_dmxdev_filter_stop+0x2b4/0x3a0 drivers/media/dvb-core/dmxdev.c:564\n dvb_dmxdev_filter_free drivers/media/dvb-core/dmxdev.c:840 [inline]\n dvb_demux_release+0x92/0x550 drivers/media/dvb-core/dmxdev.c:1246\n __fput+0x3ff/0xb70 fs/file_tabl\n---truncated---",
"id": "GHSA-3287-mf6c-3f29",
"modified": "2025-07-04T15:31:10Z",
"published": "2025-07-04T15:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38227"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d5f88f053480326873115092bc116b7d14916ba"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/685c18bc5a36f823ee725e85aac1303ef5f535ba"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/72541cae73d0809a6416bfcd2ee6473046a0013a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7e62be1f3b241bc9faee547864bb39332955509b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9824e1732a163e005aa84e12ec439493ebd4f097"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e1d72ff111eceea6b28dccb7ca4e8f4900b11729"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f8c2483be6e8bb6c2148315b4a924c65bb442b5e"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.