CVE-2022-49947
published 2025-06-18CVE-2022-49947: In the Linux kernel, the following vulnerability has been resolved: binder: fix alloc->vma_vm_mm null-ptr dereference Syzbot reported a couple issues…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.19%
8.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
binder: fix alloc->vma_vm_mm null-ptr dereference
Syzbot reported a couple issues introduced by commit 44e602b4e52f
("binder_alloc: add missing mmap_lock calls when using the VMA"), in
which we attempt to acquire the mmap_lock when alloc->vma_vm_mm has not
been initialized yet.
This can happen if a binder_proc receives a transaction without having
previously called mmap() to setup the binder_proc->alloc space in [1].
Also, a similar issue occurs via binder_alloc_print_pages() when we try
to dump the debugfs binder stats file in [2].
Sample of syzbot's crash report:
KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f]
CPU: 0 PID: 3755 Comm: syz-executor229 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
syz-executor229[3755] cmdline: ./syz-executor2294415195
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4923
[...]
Call Trace:
lock_acquire kernel/locking/lockdep.c:5666 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
down_read+0x98/0x450 kernel/locking/rwsem.c:1499
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
binder_alloc_new_buf_locked drivers/android/binder_alloc.c:405 [inline]
binder_alloc_new_buf+0xa5/0x19e0 drivers/android/binder_alloc.c:593
binder_transaction+0x242e/0x9a80 drivers/android/binder.c:3199
binder_thread_write+0x664/0x3220 drivers/android/binder.c:3986
binder_ioctl_write_read drivers/android/binder.c:5036 [inline]
binder_ioctl+0x3470/0x6d00 drivers/android/binder.c:5323
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
[...]
Fix these issues by setting up alloc->vma_vm_mm pointer during o
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.2-1 (bookworm) | linux 6.0.2-1 (bookworm) |
| linux | linux | >= 44e602b4e52f70f04620bbbf4fe46ecb40170bde < 1da52815d5f1b654c89044db0cdc6adce43da1f1 | 1da52815d5f1b654c89044db0cdc6adce43da1f1 |
| linux | linux | >= 5.15.64 < 5.15.66 | 5.15.66 |
| linux | linux | >= 5.19.6 < 5.19.8 | 5.19.8 |
| linux | linux | >= 577d9c05cc48c5242bcf719c06a5baf3105473ad < 81203ab7a6ef843a2b904a0a494f28c457d44d27 | 81203ab7a6ef843a2b904a0a494f28c457d44d27 |
| linux | linux | >= 7b0163c1b07b7ff1717aa975821c40df98786ddc < b2a97babb0a510f8921891f9e70c5a5ef33cadac | b2a97babb0a510f8921891f9e70c5a5ef33cadac |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 5.15.64 < 5.15.66 | 5.15.66 |
| linux | linux_kernel | >= 5.19.6 < 5.19.8 | 5.19.8 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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OSV
CVE-2022-49947: In the Linux kernel, the following vulnerability has been resolved: binder: fix alloc->vma_vm_mm null-ptr dereference Syzbot reported a couple issues
osv·2025-06-18·CVSS 5.5
CVE-2022-49947 [MEDIUM] CVE-2022-49947: In the Linux kernel, the following vulnerability has been resolved: binder: fix alloc->vma_vm_mm null-ptr dereference Syzbot reported a couple issues
In the Linux kernel, the following vulnerability has been resolved: binder: fix alloc->vma_vm_mm null-ptr dereference Syzbot reported a couple issues introduced by commit 44e602b4e52f ("binder_alloc: add missing mmap_lock calls when using the VMA"), in which we attempt to acquire the mmap_lock when alloc->vma_vm_mm has not been initialized yet. This can happen if a binder_proc receives a transaction without having previously called mmap() to setup the binder_proc->alloc space in [1]. Also, a similar issue occurs via binder_alloc_print_pages() when we try to dump the debugfs binder stats file in [2]. Sample of syzbot's crash report: ================================================================== KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f] CPU: 0 PID: 3755 Comm:
GHSA
GHSA-4hg9-w486-7gv5: In the Linux kernel, the following vulnerability has been resolved:
binder: fix alloc->vma_vm_mm null-ptr dereference
Syzbot reported a couple issue
ghsa_unreviewed·2025-06-18
CVE-2022-49947 [MEDIUM] CWE-476 GHSA-4hg9-w486-7gv5: In the Linux kernel, the following vulnerability has been resolved:
binder: fix alloc->vma_vm_mm null-ptr dereference
Syzbot reported a couple issue
In the Linux kernel, the following vulnerability has been resolved:
binder: fix alloc->vma_vm_mm null-ptr dereference
Syzbot reported a couple issues introduced by commit 44e602b4e52f
("binder_alloc: add missing mmap_lock calls when using the VMA"), in
which we attempt to acquire the mmap_lock when alloc->vma_vm_mm has not
been initialized yet.
This can happen if a binder_proc receives a transaction without having
previously called mmap() to setup the binder_proc->alloc space in [1].
Also, a similar issue occurs via binder_alloc_print_pages() when we try
to dump the debugfs binder stats file in [2].
Sample of syzbot's crash report:
KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f]
CPU: 0 PID: 3755 Comm: syz-executor229 Not tainted 6.0.0-rc1-next-20220819-syzkaller
Red Hat
kernel: binder: fix alloc->vma_vm_mm null-ptr dereference
vendor_redhat·2025-06-18·CVSS 5.5
CVE-2022-49947 [MEDIUM] kernel: binder: fix alloc->vma_vm_mm null-ptr dereference
kernel: binder: fix alloc->vma_vm_mm null-ptr dereference
In the Linux kernel, the following vulnerability has been resolved:
binder: fix alloc->vma_vm_mm null-ptr dereference
Syzbot reported a couple issues introduced by commit 44e602b4e52f
("binder_alloc: add missing mmap_lock calls when using the VMA"), in
which we attempt to acquire the mmap_lock when alloc->vma_vm_mm has not
been initialized yet.
This can happen if a binder_proc receives a transaction without having
previously called mmap() to setup the binder_proc->alloc space in [1].
Also, a similar issue occurs via binder_alloc_print_pages() when we try
to dump the debugfs binder stats file in [2].
Sample of syzbot's crash report:
KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f]
CPU: 0 PID: 3755 Comm: syz-exe
Debian
CVE-2022-49947: linux - In the Linux kernel, the following vulnerability has been resolved: binder: fix...
vendor_debian·2022·CVSS 5.5
CVE-2022-49947 [MEDIUM] CVE-2022-49947: linux - In the Linux kernel, the following vulnerability has been resolved: binder: fix...
In the Linux kernel, the following vulnerability has been resolved: binder: fix alloc->vma_vm_mm null-ptr dereference Syzbot reported a couple issues introduced by commit 44e602b4e52f ("binder_alloc: add missing mmap_lock calls when using the VMA"), in which we attempt to acquire the mmap_lock when alloc->vma_vm_mm has not been initialized yet. This can happen if a binder_proc receives a transaction without having previously called mmap() to setup the binder_proc->alloc space in [1]. Also, a similar issue occurs via binder_alloc_print_pages() when we try to dump the debugfs binder stats file in [2]. Sample of syzbot's crash report: ================================================================== KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f] CPU: 0 PID: 3755 Comm:
No detection rules found.
No public exploits indexed.
2025-06-18
Published