CVE-2024-26859

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nnet/bnx2x: Prevent access to a freed page in page_pool\nFix race condition leading to system crash during EEH error handling\nDuring EEH error recovery, the bnx2x driver's transmit timeout logic\ncould cause a race condition when handling reset tasks. The\nbnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(),\nwhich ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload()\nSGEs are freed using bnx2x_free_rx_sge_range(). However, this could\noverlap with the EEH driver's attempt to reset the device using\nbnx2x_io_slot_reset(), which also tries to free SGEs. This race\ncondition can result in system crashes due to accessing freed memory\nlocations in bnx2x_free_rx_sge()\n799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp,\n800struct bnx2x_fastpath *fp, u16 index)\n801 {\n802struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];\n803 struct page *page = sw_buf->page;\n....\nwhere sw_buf was set to NULL after the call to dma_unmap_page()\nby the preceding thread.\nEEH: Beginning: 'slot_reset'\nPCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset()\nbnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing...\nbnx2x 0011:01:00.0: enabling device (0140 -> 0142)\nbnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload\nKernel attempted to read user page (0) - exploit attempt? (uid: 0)\nBUG: Kernel NULL pointer dereference on read at 0x00000000\nFaulting instruction address: 0xc0080000025065fc\nOops: Kernel access of bad area, sig: 11 [#1]\n.....\nCall Trace:\n[c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable)\n[c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0\n[c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550\n[c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60\n[c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170\n[c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0\n[c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64\nTo solve this issue, we need to verify page pool allocations before\nfreeing.

See more information about CVE-2024-26859 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.1	CVSS Vector:	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	High
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 8 (kernel)	ELSA-2024-4211	2024-07-02
Oracle VM version 3 (kernel-uek)	OVMSA-2024-0011	2024-09-03