| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Double free in Windows Microsoft DirectMusic allows an unauthorized attacker to execute code over a network. |
| Use after free in Windows Client for NFS allows an unauthorized attacker to elevate privileges over a network. |
| Use after free in Kernel Transaction Manager allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Client for NFS allows an unauthorized attacker to execute code over a network. |
| Use after free in Windows Link Layer Topology Discovery Protocol allows an unauthorized attacker to execute code over an adjacent network. |
| Use after free in Windows Camera Frame Server Monitor allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally. |
| Double free in Windows DNS allows an unauthorized attacker to execute code over a network. |
| Use after free in Microsoft Bluetooth Driver allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to elevate privileges locally. |
| Double free in Windows Error Reporting allows an authorized attacker to elevate privileges locally. |
| Use after free in Remote Desktop Gateway Service allows an unauthorized attacker to execute code locally. |
| Use after free in Remote Desktop Gateway Service allows an authorized attacker to execute code locally. |
| Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network. |
| Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to elevate privileges locally. |
| Use after free in RPC Runtime allows an authorized attacker to elevate privileges locally. |
| Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. |
| In the Linux kernel, the following vulnerability has been resolved:
ext4: validate readdir offset before accessing dirent
A corrupted directory can trigger the following KASAN report when
ext4_readdir() resumes from an invalid position:
BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x5ef/0x820
Read of size 2 at addr ffff88810a646000 by task repro_linear/509
Call Trace:
<TASK>
dump_stack_lvl+0x53/0x70
print_report+0xd0/0x630
kasan_report+0xce/0x100
__ext4_check_dir_entry+0x5ef/0x820
ext4_readdir+0xcde/0x2b70
iterate_dir+0x1a1/0x520
__x64_sys_getdents64+0x12b/0x220
do_syscall_64+0xf9/0x540
entry_SYSCALL_64_after_hwframe+0x77/0x7f
</TASK>
KASAN reports use-after-free because the out-of-bounds access lands in an
adjacent freed page. The directory buffer itself is still referenced.
ext4_dir_llseek() invalidates the directory cookie so that ext4_readdir()
rescans directory entries from the start of the block. The rescan checks
only the lower bound of rec_len before advancing. A corrupted rec_len can
therefore place the offset where the block has insufficient space for a
complete directory entry. The rescan itself may dereference that truncated
entry, or the main loop may pass it to __ext4_check_dir_entry(). The latter
reads de->rec_len before validating the range. For example:
block offset 0 4092 4096
|---- de1.rec_len = 4092 -----|----|
de2.inode
| de2.rec_len
^ OOB, reported as UAF
de2 starts at offset 4092 in this 4 KiB block. Its four-byte inode fits in
the block, but its rec_len starts at offset 4096 and crosses the boundary.
The minimum safe length is inode-dependent. Encrypted and casefolded
directory entries need eight additional hash bytes, while a valid metadata
checksum tail is only 12 bytes.
Cache the metadata checksum feature state and derive the minimum directory
entry length from the on-disk format. Use it to bound both the rescan and
the offset passed to the main loop. Report an offset in a truncated block
tail and skip the remainder of the block, while continuing to accept an
offset exactly at the block boundary. |
| Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. |
