| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
inet: reject unhashed sockets during established lookups
TCP established ehash lookups are lockless. The socket caches involved
use SLAB_TYPESAFE_BY_RCU, so memory can be reused before an RCU reader
that retained its old address has finished.
After a tuple match, __inet_lookup_established() and
__inet6_lookup_established() acquire a reference and repeat the tuple
check. They do not check whether the new object is hashed. If the
address is reused for a socket with the same tuple, the lookup can
acquire a reference to the new object and return it while its nulls node
is unhashed.
A PoC that drives reuse with a SYN cookie request socket reproduced the
crash. The new request socket is unhashed and has a NULL rsk_listener.
A lookup that had loaded the address of the old request socket acquired
the reference published by tcp_get_cookie_sock() and returned the new
object. tcp_v4_rcv() then read sk_state through the NULL listener.
The resulting crash was:
BUG: kernel NULL pointer dereference, address: 0000000000000012
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
...
Oops: Oops: 0000 [#1] SMP NOPTI
CPU: 4 UID: 0 PID: 0 Comm: swapper/4 Not tainted 7.3.0-00591-g0e135910deec #1 PREEMPT(lazy)
...
RIP: 0010:tcp_v4_rcv+0x44e/0x1280
...
R10: 0000000000000001 R11: 00000000024ca8c0 R12: 0000000000000000
...
CR2: 0000000000000012 CR3: 0000000103d50004 CR4: 0000000000770ef0
...
Call Trace:
<IRQ>
? raw_local_deliver+0xae/0x240
ip_protocol_deliver_rcu+0x2d/0x180
ip_local_deliver_finish+0x84/0x100
ip_sublist_rcv_finish+0x5f/0x70
ip_sublist_rcv+0x12a/0x1d0
ip_list_rcv+0xfd/0x130
__netif_receive_skb_list_core+0x223/0x250
netif_receive_skb_list_internal+0x1d2/0x2c0
? try_fill_recv+0x39/0x7b0
napi_complete_done+0x74/0x170
virtnet_poll+0x445/0x600
__napi_poll+0x27/0x1e0
net_rx_action+0x2fe/0x3b0
handle_softirqs+0xc2/0x2c0
__irq_exit_rcu+0x74/0xd0
common_interrupt+0x7f/0x90
</IRQ>
...
Kernel panic - not syncing: Fatal exception in interrupt
After taking a reference, check whether the nulls node is unhashed in
both IPv4 and IPv6 established lookups. If it is unhashed or the tuple
no longer matches, drop the reference and restart the lookup.
Lookups racing with the TIME_WAIT hashdance, or with a request being
replaced by its child, now restart and find the new socket instead of
returning the old one.
Request sockets that were never inserted into ehash can have a nonzero
refcount, and a stale lookup can hold a transient reference. Therefore,
when SYN cookie, Fast Open, and request migration paths fail after
setting a nonzero refcount, release the references held by those paths
with reqsk_put() instead of freeing the request directly. |
| In GetTwiddledMiptreeSparsePageMap of texmgmt.c, there is a possible way to trigger an out of bounds write due to a logic error. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation. |
| postal-mime before 4.2.1 contains an algorithmic complexity denial of service vulnerability that allows unauthenticated remote attackers to cause excessive CPU consumption in the PostalMime.processLine() function by crafting deeply nested multipart email messages with boundary lines sharing long prefixes with open boundaries. Attackers can deliver a malicious email with nesting up to the default maxNestingDepth of 256, causing per-line parsing cost to scale as O(depth x shared prefix length) and blocking the Node.js event loop for seconds per message. |
| In multiple locations, there is a possible way to trigger an out of bounds read via direct memory access in video decoder firmware due to a logic error. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In getCodecQp of GC2AV1Enc.cpp, there is a possible way to trigger an out of bounds read during quantization table lookup due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation. |
| In smfc_v4l2_s_selection of smfc-v4l2-ioctls.c, there is a possible way to trigger an out of bounds read from adjacent shared memory buffers due to an integer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In prev_run_vcore of hwcodec_firmware, there is a possible Non-Heap Buffer Overflow due to a buffer overflow. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
| In multiple functions of oem_svc_setup.c, there is a possible way to dump secure cache lines into non-secure memory on warm reset due to a missing permission check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation. |
| In buffering_period of avc_decoder, there is a possible Non-Heap Buffer Overflow due to a buffer overflow. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
| Time-of-check Time-of-use (TOCTOU) Race Condition in the virtio network virtual device could allow an attacker in the guest to manipulate the virtual network device causing a crash of the QVM. |
| In fence_manager_extract_iif of fence_manager.c, there is a possible way to corrupt kernel memory via fence identifier reuse due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In tone_mapping_info of hevc_decoder, there is a possible Non-Heap Buffer Overflow due to a buffer overflow. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
| In TzPipelineInputExtractor of TzPipelineInputExtractor.cpp, there is a possible Logic check bypass due to a logic error in the code. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
| In multiple functions of sswrp_cpm.dtsi, there is a possible way to modify global reset registers from non-secure software due to a permissions bypass. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. |
| In multiple locations, there is a possible way to trigger an unbounded loop in video decoder firmware due to a logic error. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In CalculateSampleRate of cldma_alcedo.cc, there is a possible Heap Buffer Overflow due to a logic error in the code. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In platform_rio_ncp_wdt_handler of edgetpu_rio.c, there is a possible Use After Free due to a use after free. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
| In bindDataService of DataServiceManager.java, there is a possible way to retain privileged tunnel management permissions across configuration updates due to a logic error. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In multiple functions of mpu.c, there is a possible way to execute code from non-secure memory in the security coprocessor due to an insecure default value. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. |
| In spm_alloc of encoder, there is a possible Heap Buffer Overflow due to a heap buffer overflow. This could lead to local escalation of privilege with execution privileges needed. User interaction is for exploitation. |
