In the Linux kernel, the following vulnerability has been resolved: locking/qrwlock: Fix ordering in queued_write_lock_slowpath() While this code is executed with the wait_lock held, a reader can acquire the lock without holding wait_lock. The writer side loops checking the value with the atomic_cond_read_acquire(), but only truly acquires the lock when the compare-and-exchange is completed successfully which isn’t ordered. This exposes the window between the acquire and the cmpxchg to an A-B-A problem which allows reads following the lock acquisition to observe values speculatively before the write lock is truly acquired. We've seen a problem in epoll where the reader does a xchg while holding the read lock, but the writer can see a value change out from under it. Writer | Reader -------------------------------------------------------------------------------- ep_scan_ready_list() | |- write_lock_irq() | |- queued_write_lock_slowpath() | |- atomic_cond_read_acquire() | | read_lock_irqsave(&ep->lock, flags); --> (observes value before unlock) | chain_epi_lockless() | | epi->next = xchg(&ep->ovflist, epi); | | read_unlock_irqrestore(&ep->lock, flags); | | | atomic_cmpxchg_relaxed() | |-- READ_ONCE(ep->ovflist); | A core can order the read of the ovflist ahead of the atomic_cmpxchg_relaxed(). Switching the cmpxchg to use acquire semantics addresses this issue at which point the atomic_cond_read can be switched to use relaxed semantics. [peterz: use try_cmpxchg()]

A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix wq cleanup of WQCFG registers A pre-release silicon erratum workaround where wq reset does not clear WQCFG registers was leaked into upstream code. Use wq reset command instead of blasting the MMIO region. This also address an issue where we clobber registers in future devices.

An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().

Automox Agent prior to version 37 on Windows and Linux and Version 36 on OSX could allow for a non privileged user to obtain sensitive information during the install process.

pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.

An issue was discovered in romfs_dev_read in fs/romfs/storage.c in the Linux kernel before 5.8.4. Uninitialized memory leaks to userspace, aka CID-bcf85fcedfdd.

An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.

The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel through v5.16-rc5 did not properly update bounds while handling the mov32 instruction, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).

Sensitive information disclosure and manipulation due to missing authorization. The following products are affected: Acronis Agent (Linux, macOS, Windows) before build 29258.

IBM Lotus Connections 2.x before 2.0.1 stores the password for the administrative user in the trace.log file, which allows local users to obtain sensitive information by reading this file. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

IBM Spectrum Copy Data Management Admin 2.2.0.0 through 2.2.15.0 could allow a local attacker to bypass authentication restrictions, caused by the lack of proper session management. An attacker could exploit this vulnerability to bypass authentication and gain unauthorized access to the Spectrum Copy Data Management catalog which contains metadata. IBM X-Force ID: 223718.

IBM UrbanCode Deploy (UCD) 6.2.7.15, 7.0.5.10, 7.1.2.6, and 7.2.2.1 stores user credentials in plain clear text which can be read by a local user. IBM X-Force ID: 22106.

IBM QRadar SIEM 7.3, 7.4, and 7.5 could allow a local user to obtain sensitive information from the TLS key file due to incorrect file permissions. IBM X-Force ID: 223597.

In the Linux kernel before 6.5.9, there is a NULL pointer dereference in send_acknowledge in net/nfc/nci/spi.c.

Software suspend 2 2-2.2.1, when used with the Linux kernel 2.6.16, stores pre-boot authentication passwords in the BIOS Keyboard buffer and does not clear this buffer after use, which allows local users to obtain sensitive information by reading the physical memory locations associated with this buffer.

IBM Robotic Process Automation 21.0.2 could allow a local user to obtain sensitive web service configuration credentials from system memory. IBM X-Force ID: 223026.

An issue was discovered in drivers/scsi/aacraid/commctrl.c in the Linux kernel before 4.13. There is potential exposure of kernel stack memory because aac_get_hba_info does not initialize the hbainfo structure.

IBM Spectrum Protect Operations Center 8.1.12 and 8.1.13 could allow a local attacker to obtain sensitive information, caused by plain text user account passwords potentially being stored in the browser's application command history. By accessing browser history, an attacker could exploit this vulnerability to obtain other user accounts' passwords. IBM X-Force ID: 226322.

IBM WebSphere MQ 7.5, 8.0, and 9.0 through 9.0.4 could allow a local user to obtain highly sensitive information via trace logs in IBM WebSphere MQ Managed File Transfer. IBM X-Force ID: 137042.

IBM MQ Appliance 9.2 CD and 9.2 LTS local messaging users stored with a password hash that provides insufficient protection. IBM X-Force ID: 218368.

IBM Spectrum Protect Client 8.1.0.0 through 8.1.14.0 stores user credentials in plain clear text which can be read by a local user. IBM X-Force ID: 225886.

An issue was discovered in drivers/scsi/aacraid/commctrl.c in the Linux kernel before 4.13. There is potential exposure of kernel stack memory because aac_send_raw_srb does not initialize the reply structure.

A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which can result in a memory leak.

IBM WebSphere Application Server (WAS) before 6.0.2 Fix Pack 25 (6.0.2.25) and 6.1 before Fix Pack 15 (6.1.0.15) writes unspecified cleartext information to http_plugin.log, which might allow local users to obtain sensitive information by reading this file.

IBM Publishing Engine 2.1.2 and 6.0.5 contains an undisclosed vulnerability that could allow a local user with administrative privileges to obtain hard coded user credentials. IBM X-Force ID: 137022.

A numeric casting discrepancy in sdla_xfer in Linux kernel 2.6.x up to 2.6.5 and 2.4 up to 2.4.29-rc1 allows local users to read portions of kernel memory via a large len argument, which is received as an int but cast to a short, which prevents a read loop from filling a buffer.

IBM Security Access Manager Docker 10.0.0.0 through 10.0.7.1 could disclose sensitive information to a local user to do improper permission controls. IBM X-Force ID: 261195.

IBM Administration Runtime Expert for i 7.2, 7.3, 7.4, and 7.5 could allow a local user to obtain sensitive information caused by improper authority checks. IBM X-Force ID: 265266.

Sensitive information disclosure due to missing authorization. The following products are affected: Acronis Agent (Linux, macOS, Windows) before build 35739.

The walk_hugetlb_range function in mm/pagewalk.c in the Linux kernel before 4.14.2 mishandles holes in hugetlb ranges, which allows local users to obtain sensitive information from uninitialized kernel memory via crafted use of the mincore() system call.

Sensitive information disclosure due to excessive collection of system information. The following products are affected: Acronis Agent (Linux, macOS, Windows) before build 30991, Acronis Cyber Protect 15 (Linux, macOS, Windows) before build 35979.

IBM WebSphere Application Server (IBM Liberty for Java for Bluemix 3.15) could allow a local attacker to obtain sensitive information, caused by improper handling of application requests, which could allow unauthorized access to read a file. IBM X-Force ID: 134003.

IBM Business Process Manager 8.6 allows web pages to be stored locally which can be read by another user on the system. IBM X-Force ID: 135856.

IBM QRadar 7.3 stores potentially sensitive information in log files that could be read by a local user. IBM X-Force ID: 134914.

IBM Cognos Analytics 11.0 could produce results in temporary files that contain highly sensitive information that can be read by a local user. IBM X-Force ID: 136858.

IBM Tivoli Workload Scheduler 8.6.0, 9.1.0, and 9.2.0 could disclose sensitive information to a local attacker due to improper permission settings. IBM X-Force ID: 134638.

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 mishandles states_equal comparisons between the pointer data type and the UNKNOWN_VALUE data type, which allows local users to obtain potentially sensitive address information, aka a "pointer leak."

A use-after-free vulnerability was found in rtsx_usb_ms_drv_remove in drivers/memstick/host/rtsx_usb_ms.c in memstick in the Linux kernel. In this flaw, a local attacker with a user privilege may impact system Confidentiality. This flaw affects kernel versions prior to 5.14 rc1.

IBM Aspera Faspex 5.0.0 through 5.0.7 could allow a local user to obtain sensitive information due to improper encryption of certain data. IBM X-Force ID: 259671.

An information leak flaw was found due to uninitialized memory in the Linux kernel's TIPC protocol subsystem, in the way a user sends a TIPC datagram to one or more destinations. This flaw allows a local user to read some kernel memory. This issue is limited to no more than 7 bytes, and the user cannot control what is read. This flaw affects the Linux kernel versions prior to 5.17-rc1.

Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states "Basically if you care about this attack vector, disable deduplication." Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities

A vulnerability was found in the Linux kernel's eBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel. This flaws affects kernel versions < v5.16-rc6

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix kernel address leakage in atomic cmpxchg's r0 aux reg The implementation of BPF_CMPXCHG on a high level has the following parameters: .-[old-val] .-[new-val] BPF_R0 = cmpxchg{32,64}(DST_REG + insn->off, BPF_R0, SRC_REG) `-[mem-loc] `-[old-val] Given a BPF insn can only have two registers (dst, src), the R0 is fixed and used as an auxilliary register for input (old value) as well as output (returning old value from memory location). While the verifier performs a number of safety checks, it misses to reject unprivileged programs where R0 contains a pointer as old value. Through brute-forcing it takes about ~16sec on my machine to leak a kernel pointer with BPF_CMPXCHG. The PoC is basically probing for kernel addresses by storing the guessed address into the map slot as a scalar, and using the map value pointer as R0 while SRC_REG has a canary value to detect a matching address. Fix it by checking R0 for pointers, and reject if that's the case for unprivileged programs.

IBM Security Guardium 10.0 Database Activity Monitor could allow a local attacker to obtain highly sensitive information via unspecified vectors. IBM X-Force ID: 132550.

IBM Lenovo firmware 7CETB5WW 2.05 stores pre-boot authentication passwords in the BIOS Keyboard buffer and does not clear this buffer after use, which allows local users to obtain sensitive information by reading the physical memory locations associated with this buffer.

In the Linux kernel, the following vulnerability has been resolved: fs/mount_setattr: always cleanup mount_kattr Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested.

In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()' DAMON debugfs interface increases the reference counts of 'struct pid's for targets from the 'target_ids' file write callback ('dbgfs_target_ids_write()'), but decreases the counts only in DAMON monitoring termination callback ('dbgfs_before_terminate()'). Therefore, when 'target_ids' file is repeatedly written without DAMON monitoring start/termination, the reference count is not decreased and therefore memory for the 'struct pid' cannot be freed. This commit fixes this issue by decreasing the reference counts when 'target_ids' is written.