{"id":"DEBIAN-CVE-2024-26859","details":"In the Linux kernel, the following vulnerability has been resolved:  net/bnx2x: Prevent access to a freed page in page_pool  Fix race condition leading to system crash during EEH error handling  During EEH error recovery, the bnx2x driver's transmit timeout logic could cause a race condition when handling reset tasks. The bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(), which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload() SGEs are freed using bnx2x_free_rx_sge_range(). However, this could overlap with the EEH driver's attempt to reset the device using bnx2x_io_slot_reset(), which also tries to free SGEs. This race condition can result in system crashes due to accessing freed memory locations in bnx2x_free_rx_sge()  799  static inline void bnx2x_free_rx_sge(struct bnx2x *bp, 800\t\t\t\tstruct bnx2x_fastpath *fp, u16 index) 801  { 802\tstruct sw_rx_page *sw_buf = &fp-\u003erx_page_ring[index]; 803     struct page *page = sw_buf-\u003epage; .... where sw_buf was set to NULL after the call to dma_unmap_page() by the preceding thread.      EEH: Beginning: 'slot_reset'     PCI 0011:01:00.0#10000: EEH: Invoking bnx2x-\u003eslot_reset()     bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing...     bnx2x 0011:01:00.0: enabling device (0140 -\u003e 0142)     bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --\u003e driver unload     Kernel attempted to read user page (0) - exploit attempt? (uid: 0)     BUG: Kernel NULL pointer dereference on read at 0x00000000     Faulting instruction address: 0xc0080000025065fc     Oops: Kernel access of bad area, sig: 11 [#1]     .....     Call Trace:     [c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable)     [c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0     [c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550     [c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60     [c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170     [c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0     [c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64  To solve this issue, we need to verify page pool allocations before freeing.","modified":"2026-09-15T09:03:05.685000847Z","published":"2024-04-17T11:15:08.893Z","upstream":["CVE-2024-26859"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-26859"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.85-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26859.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26859.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26859.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}