--- id: CVE-2024-26859 title: |- 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 drive… summary: |- 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 drive… severity: medium cvss: 4.7 cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-362 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 4.2, < 4.19.311' - 'linux_kernel >= 4.20, < 5.4.273' - 'linux_kernel >= 5.5, < 5.10.214' - 'linux_kernel >= 5.11, < 5.15.153' - 'linux_kernel >= 5.16, < 6.1.83' - 'linux_kernel >= 6.2, < 6.6.23' - 'linux_kernel >= 6.7, < 6.7.11' - 'linux_kernel >= 6.8, < 6.8.2' - debian_linux = 10.0 patched: - linux_kernel 6.8.2 published: '2024-04-17' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:17:26.223' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26859' references: - url: 'https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd - cve.org epss: 0.00182 epssPercentile: 0.07749 ingestedAt: '2026-10-15T03:30:12.652Z' ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2024-04-23T14:02:31.556726Z' --- ## Overview 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 struct bnx2x_fastpath *fp, u16 index) 801 { 802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index]; 803 struct page *page = sw_buf->page; .... 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->slot_reset() bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing... bnx2x 0011:01:00.0: enabling device (0140 -> 0142) bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> 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. ## Affected - `linux_kernel >= 4.2, < 4.19.311` - `linux_kernel >= 4.20, < 5.4.273` - `linux_kernel >= 5.5, < 5.10.214` - `linux_kernel >= 5.11, < 5.15.153` - `linux_kernel >= 5.16, < 6.1.83` - `linux_kernel >= 6.2, < 6.6.23` - `linux_kernel >= 6.7, < 6.7.11` - `linux_kernel >= 6.8, < 6.8.2` - `debian_linux = 10.0` ## Remediation Upgrade past the affected range: - `linux_kernel 6.8.2`