| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
sched: Fix out-of-bound access in uclamp
Util-clamp places tasks in different buckets based on their clamp values
for performance reasons. However, the size of buckets is currently
computed using a rounding division, which can lead to an off-by-one
error in some configurations.
For instance, with 20 buckets, the bucket size will be 1024/20=51. A
task with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly,
correct indexes are in range [0,19], hence leading to an out of bound
memory access.
Clamp the bucket id to fix the issue. |
| In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: avoid overflows in nft_hash_buckets()
Number of buckets being stored in 32bit variables, we have to
ensure that no overflows occur in nft_hash_buckets()
syzbot injected a size == 0x40000000 and reported:
UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13
shift exponent 64 is too large for 64-bit type 'long unsigned int'
CPU: 1 PID: 29539 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
__ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327
__roundup_pow_of_two include/linux/log2.h:57 [inline]
nft_hash_buckets net/netfilter/nft_set_hash.c:411 [inline]
nft_hash_estimate.cold+0x19/0x1e net/netfilter/nft_set_hash.c:652
nft_select_set_ops net/netfilter/nf_tables_api.c:3586 [inline]
nf_tables_newset+0xe62/0x3110 net/netfilter/nf_tables_api.c:4322
nfnetlink_rcv_batch+0xa09/0x24b0 net/netfilter/nfnetlink.c:488
nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:612 [inline]
nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:630
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:674
____sys_sendmsg+0x6e8/0x810 net/socket.c:2350
___sys_sendmsg+0xf3/0x170 net/socket.c:2404
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2433
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 |
| In the Linux kernel, the following vulnerability has been resolved:
kyber: fix out of bounds access when preempted
__blk_mq_sched_bio_merge() gets the ctx and hctx for the current CPU and
passes the hctx to ->bio_merge(). kyber_bio_merge() then gets the ctx
for the current CPU again and uses that to get the corresponding Kyber
context in the passed hctx. However, the thread may be preempted between
the two calls to blk_mq_get_ctx(), and the ctx returned the second time
may no longer correspond to the passed hctx. This "works" accidentally
most of the time, but it can cause us to read garbage if the second ctx
came from an hctx with more ctx's than the first one (i.e., if
ctx->index_hw[hctx->type] > hctx->nr_ctx).
This manifested as this UBSAN array index out of bounds error reported
by Jakub:
UBSAN: array-index-out-of-bounds in ../kernel/locking/qspinlock.c:130:9
index 13106 is out of range for type 'long unsigned int [128]'
Call Trace:
dump_stack+0xa4/0xe5
ubsan_epilogue+0x5/0x40
__ubsan_handle_out_of_bounds.cold.13+0x2a/0x34
queued_spin_lock_slowpath+0x476/0x480
do_raw_spin_lock+0x1c2/0x1d0
kyber_bio_merge+0x112/0x180
blk_mq_submit_bio+0x1f5/0x1100
submit_bio_noacct+0x7b0/0x870
submit_bio+0xc2/0x3a0
btrfs_map_bio+0x4f0/0x9d0
btrfs_submit_data_bio+0x24e/0x310
submit_one_bio+0x7f/0xb0
submit_extent_page+0xc4/0x440
__extent_writepage_io+0x2b8/0x5e0
__extent_writepage+0x28d/0x6e0
extent_write_cache_pages+0x4d7/0x7a0
extent_writepages+0xa2/0x110
do_writepages+0x8f/0x180
__writeback_single_inode+0x99/0x7f0
writeback_sb_inodes+0x34e/0x790
__writeback_inodes_wb+0x9e/0x120
wb_writeback+0x4d2/0x660
wb_workfn+0x64d/0xa10
process_one_work+0x53a/0xa80
worker_thread+0x69/0x5b0
kthread+0x20b/0x240
ret_from_fork+0x1f/0x30
Only Kyber uses the hctx, so fix it by passing the request_queue to
->bio_merge() instead. BFQ and mq-deadline just use that, and Kyber can
map the queues itself to avoid the mismatch. |
| In the Linux kernel, the following vulnerability has been resolved:
usb: typec: ucsi: Retrieve all the PDOs instead of just the first 4
commit 4dbc6a4ef06d ("usb: typec: ucsi: save power data objects
in PD mode") introduced retrieval of the PDOs when connected to a
PD-capable source. But only the first 4 PDOs are received since
that is the maximum number that can be fetched at a time given the
MESSAGE_IN length limitation (16 bytes). However, as per the PD spec
a connected source may advertise up to a maximum of 7 PDOs.
If such a source is connected it's possible the PPM could have
negotiated a power contract with one of the PDOs at index greater
than 4, and would be reflected in the request data object's (RDO)
object position field. This would result in an out-of-bounds access
when the rdo_index() is used to index into the src_pdos array in
ucsi_psy_get_voltage_now().
With the help of the UBSAN -fsanitize=array-bounds checker enabled
this exact issue is revealed when connecting to a PD source adapter
that advertise 5 PDOs and the PPM enters a contract having selected
the 5th one.
[ 151.545106][ T70] Unexpected kernel BRK exception at EL1
[ 151.545112][ T70] Internal error: BRK handler: f2005512 [#1] PREEMPT SMP
...
[ 151.545499][ T70] pc : ucsi_psy_get_prop+0x208/0x20c
[ 151.545507][ T70] lr : power_supply_show_property+0xc0/0x328
...
[ 151.545542][ T70] Call trace:
[ 151.545544][ T70] ucsi_psy_get_prop+0x208/0x20c
[ 151.545546][ T70] power_supply_uevent+0x1a4/0x2f0
[ 151.545550][ T70] dev_uevent+0x200/0x384
[ 151.545555][ T70] kobject_uevent_env+0x1d4/0x7e8
[ 151.545557][ T70] power_supply_changed_work+0x174/0x31c
[ 151.545562][ T70] process_one_work+0x244/0x6f0
[ 151.545564][ T70] worker_thread+0x3e0/0xa64
We can resolve this by instead retrieving and storing up to the
maximum of 7 PDOs in the con->src_pdos array. This would involve
two calls to the GET_PDOS command. |
| In the Linux kernel, the following vulnerability has been resolved:
mtd: physmap: physmap-bt1-rom: Fix unintentional stack access
Cast &data to (char *) in order to avoid unintentionally accessing
the stack.
Notice that data is of type u32, so any increment to &data
will be in the order of 4-byte chunks, and this piece of code
is actually intended to be a byte offset.
Addresses-Coverity-ID: 1497765 ("Out-of-bounds access") |
| In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
when 'act_mirred' tries to fragment IPv4 packets that had been previously
re-assembled using 'act_ct', splats like the following can be observed on
kernels built with KASAN:
BUG: KASAN: stack-out-of-bounds in ip_do_fragment+0x1b03/0x1f60
Read of size 1 at addr ffff888147009574 by task ping/947
CPU: 0 PID: 947 Comm: ping Not tainted 5.12.0-rc6+ #418
Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014
Call Trace:
<IRQ>
dump_stack+0x92/0xc1
print_address_description.constprop.7+0x1a/0x150
kasan_report.cold.13+0x7f/0x111
ip_do_fragment+0x1b03/0x1f60
sch_fragment+0x4bf/0xe40
tcf_mirred_act+0xc3d/0x11a0 [act_mirred]
tcf_action_exec+0x104/0x3e0
fl_classify+0x49a/0x5e0 [cls_flower]
tcf_classify_ingress+0x18a/0x820
__netif_receive_skb_core+0xae7/0x3340
__netif_receive_skb_one_core+0xb6/0x1b0
process_backlog+0x1ef/0x6c0
__napi_poll+0xaa/0x500
net_rx_action+0x702/0xac0
__do_softirq+0x1e4/0x97f
do_softirq+0x71/0x90
</IRQ>
__local_bh_enable_ip+0xdb/0xf0
ip_finish_output2+0x760/0x2120
ip_do_fragment+0x15a5/0x1f60
__ip_finish_output+0x4c2/0xea0
ip_output+0x1ca/0x4d0
ip_send_skb+0x37/0xa0
raw_sendmsg+0x1c4b/0x2d00
sock_sendmsg+0xdb/0x110
__sys_sendto+0x1d7/0x2b0
__x64_sys_sendto+0xdd/0x1b0
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f82e13853eb
Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89
RSP: 002b:00007ffe01fad888 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00005571aac13700 RCX: 00007f82e13853eb
RDX: 0000000000002330 RSI: 00005571aac13700 RDI: 0000000000000003
RBP: 0000000000002330 R08: 00005571aac10500 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe01faefb0
R13: 00007ffe01fad890 R14: 00007ffe01fad980 R15: 00005571aac0f0a0
The buggy address belongs to the page:
page:000000001dff2e03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147009
flags: 0x17ffffc0001000(reserved)
raw: 0017ffffc0001000 ffffea00051c0248 ffffea00051c0248 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888147009400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888147009480: f1 f1 f1 f1 04 f2 f2 f2 f2 f2 f2 f2 00 00 00 00
>ffff888147009500: 00 00 00 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 f2
^
ffff888147009580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888147009600: 00 00 00 00 00 00 00 00 00 00 00 00 00 f2 f2 f2
for IPv4 packets, sch_fragment() uses a temporary struct dst_entry. Then,
in the following call graph:
ip_do_fragment()
ip_skb_dst_mtu()
ip_dst_mtu_maybe_forward()
ip_mtu_locked()
the pointer to struct dst_entry is used as pointer to struct rtable: this
turns the access to struct members like rt_mtu_locked into an OOB read in
the stack. Fix this changing the temporary variable used for IPv4 packets
in sch_fragment(), similarly to what is done for IPv6 few lines below. |
| In the Linux kernel, the following vulnerability has been resolved:
NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds
Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused
by a garbage timeout (retrans) mount option being passed to nfs mount,
in this case from syzkaller.
If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift
value for a 64-bit long integer, so 'retrans' cannot be >= 64.
If it is >= 64, fail the mount and return an error. |
| In the Linux kernel, the following vulnerability has been resolved:
netlabel: fix out-of-bounds memory accesses
There are two array out-of-bounds memory accesses, one in
cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both
errors are embarassingly simple, and the fixes are straightforward.
As a FYI for anyone backporting this patch to kernels prior to v4.8,
you'll want to apply the netlbl_bitmap_walk() patch to
cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before
Linux v4.8. |
| Microsoft Message Queuing Information Disclosure Vulnerability |
| Microsoft Message Queuing Information Disclosure Vulnerability |
| Microsoft Common Log File System Elevation of Privilege Vulnerability |
| Microsoft Virtual Hard Disk Elevation of Privilege Vulnerability |
| Windows Network Address Translation (NAT) Denial of Service Vulnerability |
| Windows Network Address Translation (NAT) Denial of Service Vulnerability |
| Windows Kernel Information Disclosure Vulnerability |
| Windows USB Attached SCSI (UAS) Protocol Remote Code Execution Vulnerability |
| Microsoft ODBC Driver for SQL Server Remote Code Execution Vulnerability |
| Windows Remote Access Connection Manager Information Disclosure Vulnerability |
| Windows Distributed File System (DFS) Information Disclosure Vulnerability |
| Windows Remote Access Connection Manager Information Disclosure Vulnerability |
