CVE-2025-39949 — qed: Don't collect too many protection override GRC elements

Affected: Linux

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

qed: Don't collect too many protection override GRC elements

In the protection override dump path, the firmware can return far too many GRC elements, resulting in attempting to write past the end of the previously-kmalloc'ed dump buffer.

This will result in a kernel panic with reason:

BUG: unable to handle kernel paging request at ADDRESS

where "ADDRESS" is just past the end of the protection override dump buffer. The start address of the buffer is: p_hwfn->cdev->dbg_features[DBG_FEATURE_PROTECTION_OVERRIDE].dump_buf and the size of the buffer is buf_size in the same data structure.

The panic can be arrived at from either the qede Ethernet driver path:

[exception RIP: qed_grc_dump_addr_range+0x108] qed_protection_override_dump at ffffffffc02662ed [qed] qed_dbg_protection_override_dump at ffffffffc0267792 [qed] qed_dbg_feature at ffffffffc026aa8f [qed] qed_dbg_all_data at ffffffffc026b211 [qed] qed_fw_fatal_reporter_dump at ffffffffc027298a [qed] devlink_health_do_dump at ffffffff82497f61 devlink_health_report at ffffffff8249cf29 qed_report_fatal_error at ffffffffc0272baf [qed] qede_sp_task at ffffffffc045ed32 [qede] process_one_work at ffffffff81d19783

or the qedf storage driver path:

[exception RIP: qed_grc_dump_addr_range+0x108] qed_protection_override_dump at ffffffffc068b2ed [qed] qed_dbg_protection_override_dump at ffffffffc068c792 [qed] qed_dbg_feature at ffffffffc068fa8…

USN-8033-1 — linux, linux-aws, linux-gcp, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-lowlatency, linux…

Affected: Ubuntu:Pro:20.04:LTS: linux-hwe-5.15, Ubuntu:Pro:20.04:LTS: linux-ibm-5.15, Ubuntu:Pro:20.04:LTS: linux-lowlatency-hwe-5.15, Ubuntu:22.04:LTS: linux, Ubuntu:22.04:LTS: linux-aws, Ubuntu:22.04:LTS: linux-gcp, Ubuntu:22.04:LTS: linux-gke, Ubuntu:22.04:LTS: linux-gkeop, Ubuntu:22.04:LTS: linux-ibm, Ubuntu:22.04:LTS: linux-lowlatency

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: - Nios II architecture; - Sun Sparc architecture; - User-Mode Linux (UML); - x86 architecture; - Block layer subsystem; - Cryptographic API; - Drivers core; - Bus devices; - Hardware random number generator core; - Data acquisition framework and drivers; - CPU frequency scaling framework; - DMA engine subsystem; - GPU drivers; - HW tracing; - Input Device (Miscellaneous) drivers; - Multiple devices driver; - Media drivers; - MOST (Media Oriented Systems Transport) drivers; - MTD block device drivers; - Network drivers; - NVME drivers; - PCI subsystem; - Performance monitor drivers; - Pin controllers subsystem; - x86 platform drivers; - PPS (Pulse Per Second) driver; - PWM drivers; - SCSI subsystem; - TCM subsystem; - Userspace I/O drivers; - USB Gadget drivers; - USB Host Controller drivers; - Framebuffer layer; - BTRFS file system; - File systems infrastructure; - Ext4 file system; - Network file system (NFS) server daemon; - NTFS3 file system; - SMB network file system; - padata parallel execution mechanism; - IP tunnels definitions; - Network sockets; - XFRM subsystem; - Control group (cgroup); - Padata parallel execution mechanism; - PID allocator; - Tracing infrastructure; - Memory management; - 9…

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CVE-2025-39949 — qed: Don't collect too many protection override GRC elements

USN-8033-1 — linux, linux-aws, linux-gcp, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-lowlatency, linux…