CVE-2025-38027 — regulator: max20086: fix invalid memory access

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

regulator: max20086: fix invalid memory access

max20086_parse_regulators_dt() calls of_regulator_match() using an array of struct of_regulator_match allocated on the stack for the matches argument.

of_regulator_match() calls devm_of_regulator_put_matches(), which calls devres_alloc() to allocate a struct devm_of_regulator_matches which will be de-allocated using devm_of_regulator_put_matches().

struct devm_of_regulator_matches is populated with the stack allocated matches array.

If the device fails to probe, devm_of_regulator_put_matches() will be called and will try to call of_node_put() on that stack pointer, generating the following dmesg entries:

max20086 6-0028: Failed to read DEVICE_ID reg: -121 kobject: '\xc0$\xa5\x03' (000000002cebcb7a): is not initialized, yet kobject_put() is being called.

Followed by a stack trace matching the call flow described above.

Switch to allocating the matches array using devm_kcalloc() to avoid accessing the stack pointer long after it's out of scope.

This also has the advantage of allowing multiple max20086 to probe without overriding the data stored inside the global of_regulator_match.

USN-7699-1 — linux, linux-aws, linux-aws-6.14, linux-gcp, linux-gcp-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realti…

Affected: Ubuntu:24.04:LTS: linux-aws-6.14, Ubuntu:24.04:LTS: linux-gcp-6.14, Ubuntu:24.04:LTS: linux-oracle-6.14

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - RISC-V architecture; - x86 architecture; - Buffer Sharing and Synchronization framework; - DMA engine subsystem; - GPU drivers; - HID subsystem; - IIO ADC drivers; - IIO subsystem; - InfiniBand drivers; - Input Device core drivers; - Network drivers; - Mellanox network drivers; - PHY drivers; - Voltage and Current Regulator drivers; - VideoCore services drivers; - USB Type-C Connector System Software Interface driver; - Xen hypervisor drivers; - EROFS file system; - Network file system (NFS) client; - File systems infrastructure; - SMB network file system; - Network traffic control; - io_uring subsystem; - Kernel command line parsing driver; - Scheduler infrastructure; - Memory management; - Networking core; - MAC80211 subsystem; - Management Component Transport Protocol (MCTP); - Netfilter; - Open vSwitch; - TLS protocol; - Wireless networking; - SOF drivers; (CVE-2025-38011, CVE-2025-38095, CVE-2025-37967, CVE-2025-38012, CVE-2025-38019, CVE-2025-37960, CVE-2025-37973, CVE-2025-37958, CVE-2025-38094, CVE-2025-37963, CVE-2025-37955, CVE-2025-38014, CVE-2025-38025, CVE-2025-37970, CVE-2025-37947, CVE-2025-37966, CVE-2025-37948, CVE-2025-38013, CVE-2025-37957, CVE-2025-38028, CVE-2025-37962, CVE-2025-38002,…

Most recent entries from all

CVE-2025-38027 — regulator: max20086: fix invalid memory access

USN-7699-1 — linux, linux-aws, linux-aws-6.14, linux-gcp, linux-gcp-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realti…