| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
HID: appletb-kbd: fix UAF in inactivity-timer cleanup path
Commit 38224c472a03 ("HID: appletb-kbd: fix slab use-after-free bug in
appletb_kbd_probe") added timer_delete_sync(&kbd->inactivity_timer) to
both the probe close_hw error path and appletb_kbd_remove(), but the
way it was wired in left the inactivity timer reachable during driver
tear-down via two distinct windows.
Window A -- put_device() before timer_delete_sync():
put_device(&kbd->backlight_dev->dev);
timer_delete_sync(&kbd->inactivity_timer);
The inactivity_timer softirq reads kbd->backlight_dev and calls
backlight_device_set_brightness() -> mutex_lock(&ops_lock). If a
concurrent hid_appletb_bl unbind drops the last devm reference
between these two calls, the backlight_device is freed and the
mutex_lock() touches freed memory.
Window B -- backlight cleanup before hid_hw_stop():
if (kbd->backlight_dev) {
timer_delete_sync(...);
put_device(...);
}
hid_hw_close(hdev);
hid_hw_stop(hdev);
Even after Window A is closed, hid_hw_close()/hid_hw_stop() still run
afterwards, so a late ".event" callback from the HID core (USB URB
completion on real Apple hardware) can arrive after
timer_delete_sync() drained the softirq but before put_device() drops
the reference. That callback reaches reset_inactivity_timer(), which
calls mod_timer() and re-arms the timer. The freshly re-armed timer
can then fire on the about-to-be-freed backlight_device.
Both windows produce the same KASAN slab-use-after-free:
BUG: KASAN: slab-use-after-free in __mutex_lock+0x1aab/0x21c0
Read of size 8 at addr ffff88803ee9a108 by task swapper/0/0
Call Trace:
<IRQ>
__mutex_lock
backlight_device_set_brightness
appletb_inactivity_timer
call_timer_fn
run_timer_softirq
handle_softirqs
Allocated by task N:
devm_backlight_device_register
appletb_bl_probe
Freed by task M:
(concurrent hid_appletb_bl unbind path)
Close both windows at once by reworking the tear-down in
appletb_kbd_remove() and in the probe close_hw error path so that
1) hid_hw_close()/hid_hw_stop() run before the backlight cleanup,
guaranteeing no further .event callback can fire and re-arm the
timer, and
2) inside the "if (kbd->backlight_dev)" block, timer_delete_sync()
runs before put_device(), so the softirq is drained before the
final reference is dropped. |
| In the Linux kernel, the following vulnerability has been resolved:
spi: mpc52xx: fix use-after-free on unbind
The state machine work is scheduled by the interrupt handler and
therefore needs to be cancelled after disabling interrupts to avoid a
potential use-after-free. |
| In the Linux kernel, the following vulnerability has been resolved:
HID: appletb-kbd: run inactivity autodim from workqueues
The autodim code in hid-appletb-kbd takes backlight_device->ops_lock
via backlight_device_set_brightness() -> mutex_lock() from two
different atomic contexts:
* appletb_inactivity_timer() is a struct timer_list callback, so it
runs in softirq context. Every expiry triggers
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:591
Call Trace:
<IRQ>
__might_resched
__mutex_lock
backlight_device_set_brightness
appletb_inactivity_timer
call_timer_fn
run_timer_softirq
* reset_inactivity_timer() is called from appletb_kbd_hid_event() and
appletb_kbd_inp_event(). On real USB hardware these run in
softirq/IRQ context (URB completion and input-event dispatch).
When the Touch Bar has already been dimmed or turned off, the
reset path calls backlight_device_set_brightness() directly to
restore brightness, producing the same warning.
Both call sites hit the same mutex_lock()-from-atomic bug. Fix them
together by moving the blocking work onto the system workqueue:
* Convert the inactivity timer from struct timer_list to
struct delayed_work; the callback (appletb_inactivity_work) now
runs in process context where mutex_lock() is legal.
* Add a dedicated struct work_struct restore_brightness_work and have
reset_inactivity_timer() schedule it instead of calling
backlight_device_set_brightness() directly.
Cancel both works synchronously during driver tear-down alongside the
existing backlight reference drop.
The semantics are unchanged (same delays, same state transitions on
dim, turn-off and user activity); only the execution context of the
sleeping call changes. The timer field and callback are renamed to
match their new type; reset_inactivity_timer() keeps its name because
it is invoked from input event paths that read naturally as "reset
the inactivity timer". |
| Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. |
| Use after free in Linux MANA Driver allows an authorized attacker to elevate privileges locally. |
| Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally. |
| In the Linux kernel, the following vulnerability has been resolved:
sched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters
scx_group_set_{weight,idle,bandwidth}() cache scx_root before acquiring
scx_cgroup_ops_rwsem, so the pointer can be stale by the time the op runs.
If the loaded scheduler is disabled and freed (via RCU work) and another is
enabled between the naked load and the rwsem acquire, the reader sees
scx_cgroup_enabled=true (the new scheduler's) but dereferences the freed one
- UAF on SCX_HAS_OP(sch, ...) / SCX_CALL_OP(sch, ...).
scx_cgroup_enabled is toggled only under scx_cgroup_ops_rwsem write
(scx_cgroup_{init,exit}), so reading scx_root inside the rwsem read section
correlates @sch with the enabled snapshot. |
| In the Linux kernel, the following vulnerability has been resolved:
power: supply: rt9455: Fix use-after-free in power_supply_changed()
Using the `devm_` variant for requesting IRQ _before_ the `devm_`
variant for allocating/registering the `power_supply` handle, means that
the `power_supply` handle will be deallocated/unregistered _before_ the
interrupt handler (since `devm_` naturally deallocates in reverse
allocation order). This means that during removal, there is a race
condition where an interrupt can fire just _after_ the `power_supply`
handle has been freed, *but* just _before_ the corresponding
unregistration of the IRQ handler has run.
This will lead to the IRQ handler calling `power_supply_changed()` with
a freed `power_supply` handle. Which usually crashes the system or
otherwise silently corrupts the memory...
Note that there is a similar situation which can also happen during
`probe()`; the possibility of an interrupt firing _before_ registering
the `power_supply` handle. This would then lead to the nasty situation
of using the `power_supply` handle *uninitialized* in
`power_supply_changed()`.
Fix this racy use-after-free by making sure the IRQ is requested _after_
the registration of the `power_supply` handle. |
| In the Linux kernel, the following vulnerability has been resolved:
nfc: hci: shdlc: Stop timers and work before freeing context
llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc
structure while its timers and state machine work may still be active.
Timer callbacks can schedule sm_work, and sm_work accesses SHDLC state
and the skb queues. If teardown happens in parallel with a queued/running
work item, it can lead to UAF and other shutdown races.
Stop all SHDLC timers and cancel sm_work synchronously before purging the
queues and freeing the context.
Found by Linux Verification Center (linuxtesting.org) with SVACE. |
| Microsoft Excel Remote Code Execution Vulnerability |
| In the Linux kernel, the following vulnerability has been resolved:
spi: topcliff-pch: fix use-after-free on unbind
Give the driver a chance to flush its queue before releasing the DMA
buffers on driver unbind |
| In the Linux kernel, the following vulnerability has been resolved:
mtd: docg3: fix use-after-free in docg3_release()
In docg3_release(), the docg3 pointer is obtained from
cascade->floors[0]->priv before the loop that calls
doc_release_device() on each floor. doc_release_device() frees the
docg3 struct via kfree(docg3) at line 1881. After the loop,
docg3->cascade->bch dereferences the already-freed pointer.
Fix this by accessing cascade->bch directly, which is equivalent
since docg3->cascade points back to the same cascade struct, and
is already available as a local variable. This also removes the
now-unused docg3 local variable. |
| In the Linux kernel, the following vulnerability has been resolved:
pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()
In scpsys_get_bus_protection_legacy(), of_find_node_with_property()
returns a device node with its reference count incremented. The function
then calls of_node_put(node) before checking whether
syscon_regmap_lookup_by_phandle() returns an error. If an error occurs,
dev_err_probe() dereferences the node pointer to print diagnostic
information, but the node memory may have already been freed due to the
earlier of_node_put(), leading to a use-after-free vulnerability.
Fix this by moving the of_node_put() call after the error check, ensuring
the node is still valid when accessed in the error path. |
| In the Linux kernel, the following vulnerability has been resolved:
net: txgbe: fix RTNL assertion warning when remove module
For the copper NIC with external PHY, the driver called
phylink_connect_phy() during probe and phylink_disconnect_phy() during
remove. It caused an RTNL assertion warning in phylink_disconnect_phy()
upon module remove.
To fix this, add rtnl_lock() and rtnl_unlock() around the
phylink_disconnect_phy() in remove function.
------------[ cut here ]------------
RTNL: assertion failed at drivers/net/phy/phylink.c (2351)
WARNING: drivers/net/phy/phylink.c:2351 at
phylink_disconnect_phy+0xd8/0xf0 [phylink], CPU#0: rmmod/4464
Modules linked in: ...
CPU: 0 UID: 0 PID: 4464 Comm: rmmod Kdump: loaded Not tainted 7.0.0-rc4+
Hardware name: Micro-Star International Co., Ltd. MS-7E16/X670E GAMING
PLUS WIFI (MS-7E16), BIOS 1.90 12/31/2024
RIP: 0010:phylink_disconnect_phy+0xe4/0xf0 [phylink]
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d 31 c0 31 d2 31 f6 31 ff e9 3a 38 8f e7
48 8d 3d 48 87 e2 ff ba 2f 09 00 00 48 c7 c6 c1 22 24 c0 <67> 48 0f b9 3a
e9 34 ff ff ff 66 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffce7288363ac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff89654b2a1a00 RCX: 0000000000000000
RDX: 000000000000092f RSI: ffffffffc02422c1 RDI: ffffffffc0239020
RBP: ffffce7288363ae8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8964c4022000
R13: ffff89654fce3028 R14: ffff89654ebb4000 R15: ffffffffc0226348
FS: 0000795e80d93780(0000) GS:ffff896c52857000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005b528b592000 CR3: 0000000170d0f000 CR4: 0000000000f50ef0
PKRU: 55555554
Call Trace:
<TASK>
txgbe_remove_phy+0xbb/0xd0 [txgbe]
txgbe_remove+0x4c/0xb0 [txgbe]
pci_device_remove+0x41/0xb0
device_remove+0x43/0x80
device_release_driver_internal+0x206/0x270
driver_detach+0x4a/0xa0
bus_remove_driver+0x83/0x120
driver_unregister+0x2f/0x60
pci_unregister_driver+0x40/0x90
txgbe_driver_exit+0x10/0x850 [txgbe]
__do_sys_delete_module.isra.0+0x1c3/0x2f0
__x64_sys_delete_module+0x12/0x20
x64_sys_call+0x20c3/0x2390
do_syscall_64+0x11c/0x1500
? srso_alias_return_thunk+0x5/0xfbef5
? do_syscall_64+0x15a/0x1500
? srso_alias_return_thunk+0x5/0xfbef5
? do_fault+0x312/0x580
? srso_alias_return_thunk+0x5/0xfbef5
? __handle_mm_fault+0x9d5/0x1040
? srso_alias_return_thunk+0x5/0xfbef5
? count_memcg_events+0x101/0x1d0
? srso_alias_return_thunk+0x5/0xfbef5
? handle_mm_fault+0x1e8/0x2f0
? srso_alias_return_thunk+0x5/0xfbef5
? do_user_addr_fault+0x2f8/0x820
? srso_alias_return_thunk+0x5/0xfbef5
? irqentry_exit+0xb2/0x600
? srso_alias_return_thunk+0x5/0xfbef5
? exc_page_fault+0x92/0x1c0
entry_SYSCALL_64_after_hwframe+0x76/0x7e |
| In the Linux kernel, the following vulnerability has been resolved:
io-wq: check that the predecessor is hashed in io_wq_remove_pending()
io_wq_remove_pending() needs to fix up wq->hash_tail[] if the cancelled
work was the tail of its hash bucket. When doing this, it checks whether
the preceding entry in acct->work_list has the same hash value, but
never checks that the predecessor is hashed at all. io_get_work_hash()
is simply atomic_read(&work->flags) >> IO_WQ_HASH_SHIFT, and the hash
bits are never set for non-hashed work, so it returns 0. Thus, when a
hashed bucket-0 work is cancelled while a non-hashed work is its list
predecessor, the check spuriously passes and a pointer to the non-hashed
io_kiocb is stored in wq->hash_tail[0].
Because non-hashed work is dequeued via the fast path in
io_get_next_work(), which never touches hash_tail[], the stale pointer
is never cleared. Therefore, after the non-hashed io_kiocb completes and
is freed back to req_cachep, wq->hash_tail[0] is a dangling pointer. The
io_wq is per-task (tctx->io_wq) and survives ring open/close, so the
dangling pointer persists for the lifetime of the task; the next hashed
bucket-0 enqueue dereferences it in io_wq_insert_work() and
wq_list_add_after() writes through freed memory.
Add the missing io_wq_is_hashed() check so a non-hashed predecessor
never inherits a hash_tail[] slot. |
| Use after free in Chromoting in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Medium) |
| Use after free in Cast Streaming in Google Chrome prior to 149.0.7827.53 allowed an attacker on the local network segment to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical) |
| Use after free in Cast in Google Chrome prior to 149.0.7827.53 allowed an attacker on the local network segment to potentially exploit heap corruption via malicious network traffic. (Chromium security severity: Critical) |
| Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure. |
| In the Linux kernel, the following vulnerability has been resolved:
xfs: stop reclaim before pushing AIL during unmount
The unmount sequence in xfs_unmount_flush_inodes() pushed the AIL while
background reclaim and inodegc are still running. This is broken
independently of any use-after-free issues - background reclaim and
inodegc should not be running while the AIL is being pushed during
unmount, as inodegc can dirty and insert inodes into the AIL during the
flush, and background reclaim can race to abort and free dirty inodes.
Reorder xfs_unmount_flush_inodes() to stop inodegc and cancel background
reclaim before pushing the AIL. Stop inodegc before cancelling
m_reclaim_work because the inodegc worker can re-queue m_reclaim_work
via xfs_inodegc_set_reclaimable. |
