{"id":"CVE-2024-26859","summary":"net/bnx2x: Prevent access to a freed page in page_pool","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/bnx2x: Prevent access to a freed page in page_pool\n\nFix race condition leading to system crash during EEH error handling\n\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()\n\n799  static inline void bnx2x_free_rx_sge(struct bnx2x *bp,\n800\t\t\t\tstruct bnx2x_fastpath *fp, u16 index)\n801  {\n802\tstruct sw_rx_page *sw_buf = &fp-\u003erx_page_ring[index];\n803     struct page *page = sw_buf-\u003epage;\n....\nwhere sw_buf was set to NULL after the call to dma_unmap_page()\nby the preceding thread.\n\n    EEH: Beginning: 'slot_reset'\n    PCI 0011:01:00.0#10000: EEH: Invoking bnx2x-\u003eslot_reset()\n    bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing...\n    bnx2x 0011:01:00.0: enabling device (0140 -\u003e 0142)\n    bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --\u003e driver unload\n    Kernel attempted to read user page (0) - exploit attempt? (uid: 0)\n    BUG: Kernel NULL pointer dereference on read at 0x00000000\n    Faulting instruction address: 0xc0080000025065fc\n    Oops: Kernel access of bad area, sig: 11 [#1]\n    .....\n    Call 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\n\nTo solve this issue, we need to verify page pool allocations before\nfreeing.","modified":"2026-04-02T10:06:10.203453Z","published":"2024-04-17T10:27:23.709Z","related":["ALSA-2024:4211","ALSA-2024:4352","SUSE-SU-2024:1643-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1870-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2190-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26859.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26859.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26859"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4cace675d687ebd2d813e90af80ff87ee85202f9"},{"fixed":"7bcc090c81116c66936a7415f2c6b1483a4bcfd9"},{"fixed":"4f37d3a7e004bbf560c21441ca9c022168017ec4"},{"fixed":"8eebff95ce9558be66a36aa7cfb43223f3ab4699"},{"fixed":"8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598"},{"fixed":"cf7d8cba639ae792a42c2a137b495eac262ac36c"},{"fixed":"3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb"},{"fixed":"c51f8b6930db3f259b8820b589f2459d2df3fc68"},{"fixed":"44f9f1abb0ecc43023225ab9539167facbabf0ec"},{"fixed":"d27e2da94a42655861ca4baea30c8cd65546f25d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26859.json"}}],"schema_version":"1.7.5"}