Linux: >> Linux Kernel >> 2.16.12 Security Vulnerabilities
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: fix use-after-free during gpu recovery
[Why]
[ 754.862560] refcount_t: underflow; use-after-free.
[ 754.862898] Call Trace:
[ 754.862903] <TASK>
[ 754.862913] amdgpu_job_free_cb+0xc2/0xe1 [amdgpu]
[ 754.863543] drm_sched_main.cold+0x34/0x39 [amd_sched]
[How]
The fw_fence may be not init, check whether dma_fence_init
is performed before job free
CVSS Score
7.8
EPSS Score
0.0
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
xen-netfront: Fix NULL sring after live migration
A NAPI is setup for each network sring to poll data to kernel
The sring with source host is destroyed before live migration and
new sring with target host is setup after live migration.
The NAPI for the old sring is not deleted until setup new sring
with target host after migration. With busy_poll/busy_read enabled,
the NAPI can be polled before got deleted when resume VM.
BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
IP: xennet_poll+0xae/0xd20
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
Call Trace:
finish_task_switch+0x71/0x230
timerqueue_del+0x1d/0x40
hrtimer_try_to_cancel+0xb5/0x110
xennet_alloc_rx_buffers+0x2a0/0x2a0
napi_busy_loop+0xdb/0x270
sock_poll+0x87/0x90
do_sys_poll+0x26f/0x580
tracing_map_insert+0x1d4/0x2f0
event_hist_trigger+0x14a/0x260
finish_task_switch+0x71/0x230
__schedule+0x256/0x890
recalc_sigpending+0x1b/0x50
xen_sched_clock+0x15/0x20
__rb_reserve_next+0x12d/0x140
ring_buffer_lock_reserve+0x123/0x3d0
event_triggers_call+0x87/0xb0
trace_event_buffer_commit+0x1c4/0x210
xen_clocksource_get_cycles+0x15/0x20
ktime_get_ts64+0x51/0xf0
SyS_ppoll+0x160/0x1a0
SyS_ppoll+0x160/0x1a0
do_syscall_64+0x73/0x130
entry_SYSCALL_64_after_hwframe+0x41/0xa6
...
RIP: xennet_poll+0xae/0xd20 RSP: ffffb4f041933900
CR2: 0000000000000008
---[ end trace f8601785b354351c ]---
xen frontend should remove the NAPIs for the old srings before live
migration as the bond srings are destroyed
There is a tiny window between the srings are set to NULL and
the NAPIs are disabled, It is safe as the NAPI threads are still
frozen at that time
CVSS Score
5.5
EPSS Score
0.001
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
HID: core: fix shift-out-of-bounds in hid_report_raw_event
Syzbot reported shift-out-of-bounds in hid_report_raw_event.
microsoft 0003:045E:07DA.0001: hid_field_extract() called with n (128) >
32! (swapper/0)
======================================================================
UBSAN: shift-out-of-bounds in drivers/hid/hid-core.c:1323:20
shift exponent 127 is too large for 32-bit type 'int'
CPU: 0 PID: 0 Comm: swapper/0 Not tainted
6.1.0-rc4-syzkaller-00159-g4bbf3422df78 #0
Hardware name: Google Compute Engine/Google Compute Engine, BIOS
Google 10/26/2022
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
ubsan_epilogue lib/ubsan.c:151 [inline]
__ubsan_handle_shift_out_of_bounds+0x3a6/0x420 lib/ubsan.c:322
snto32 drivers/hid/hid-core.c:1323 [inline]
hid_input_fetch_field drivers/hid/hid-core.c:1572 [inline]
hid_process_report drivers/hid/hid-core.c:1665 [inline]
hid_report_raw_event+0xd56/0x18b0 drivers/hid/hid-core.c:1998
hid_input_report+0x408/0x4f0 drivers/hid/hid-core.c:2066
hid_irq_in+0x459/0x690 drivers/hid/usbhid/hid-core.c:284
__usb_hcd_giveback_urb+0x369/0x530 drivers/usb/core/hcd.c:1671
dummy_timer+0x86b/0x3110 drivers/usb/gadget/udc/dummy_hcd.c:1988
call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x76a/0x980 kernel/time/timer.c:1790
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803
__do_softirq+0x277/0x75b kernel/softirq.c:571
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1107
======================================================================
If the size of the integer (unsigned n) is bigger than 32 in snto32(),
shift exponent will be too large for 32-bit type 'int', resulting in a
shift-out-of-bounds bug.
Fix this by adding a check on the size of the integer (unsigned n) in
snto32(). To add support for n greater than 32 bits, set n to 32, if n
is greater than 32.
CVSS Score
5.5
EPSS Score
0.001
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: fix array index out of bound error in DCN32 DML
[Why&How]
LinkCapacitySupport array is indexed with the number of voltage states and
not the number of max DPPs. Fix the error by changing the array
declaration to use the correct (larger) array size of total number of
voltage states.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
ethernet: aeroflex: fix potential skb leak in greth_init_rings()
The greth_init_rings() function won't free the newly allocated skb when
dma_mapping_error() returns error, so add dev_kfree_skb() to fix it.
Compile tested only.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
udf: Fix preallocation discarding at indirect extent boundary
When preallocation extent is the first one in the extent block, the
code would corrupt extent tree header instead. Fix the problem and use
udf_delete_aext() for deleting extent to avoid some code duplication.
CVSS Score
5.5
EPSS Score
0.001
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix u8 overflow
By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases
multiple times and eventually it will wrap around the maximum number
(i.e., 255).
This patch prevents this by adding a boundary check with
L2CAP_MAX_CONF_RSP
Btmon log:
Bluetooth monitor ver 5.64
= Note: Linux version 6.1.0-rc2 (x86_64) 0.264594
= Note: Bluetooth subsystem version 2.22 0.264636
@ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191
= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604
@ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741
= Open Index: 00:00:00:00:00:00 [hci0] 13.900426
(...)
> ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106
invalid packet size (12 != 1033)
08 00 01 00 02 01 04 00 01 10 ff ff ............
> ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561
invalid packet size (14 != 1547)
0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@.....
> ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390
invalid packet size (16 != 2061)
0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@.......
> ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932
invalid packet size (16 != 2061)
0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@.......
= bluetoothd: Bluetooth daemon 5.43 14.401828
> ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753
invalid packet size (12 != 1033)
08 00 01 00 04 01 04 00 40 00 00 00 ........@...
CVSS Score
5.5
EPSS Score
0.0
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: uvc: Prevent buffer overflow in setup handler
Setup function uvc_function_setup permits control transfer
requests with up to 64 bytes of payload (UVC_MAX_REQUEST_SIZE),
data stage handler for OUT transfer uses memcpy to copy req->actual
bytes to uvc_event->data.data array of size 60. This may result
in an overflow of 4 bytes.
CVSS Score
7.8
EPSS Score
0.0
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
perf: Fix perf_pending_task() UaF
Per syzbot it is possible for perf_pending_task() to run after the
event is free()'d. There are two related but distinct cases:
- the task_work was already queued before destroying the event;
- destroying the event itself queues the task_work.
The first cannot be solved using task_work_cancel() since
perf_release() itself might be called from a task_work (____fput),
which means the current->task_works list is already empty and
task_work_cancel() won't be able to find the perf_pending_task()
entry.
The simplest alternative is extending the perf_event lifetime to cover
the task_work.
The second is just silly, queueing a task_work while you know the
event is going away makes no sense and is easily avoided by
re-arranging how the event is marked STATE_DEAD and ensuring it goes
through STATE_OFF on the way down.
CVSS Score
7.8
EPSS Score
0.001
Published
2024-10-21
In the Linux kernel, the following vulnerability has been resolved:
ASoC: ops: Check bounds for second channel in snd_soc_put_volsw_sx()
The bounds checks in snd_soc_put_volsw_sx() are only being applied to the
first channel, meaning it is possible to write out of bounds values to the
second channel in stereo controls. Add appropriate checks.
CVSS Score
7.8
EPSS Score
0.0
Published
2024-10-21