CVE-2024-26859: net/bnx2x: Prevent access to a freed page in page_pool
First published: Wed Apr 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.19.311 | 4.19.311 |
| redhat/kernel | <5.4.273 | 5.4.273 |
| redhat/kernel | <5.10.214 | 5.10.214 |
| redhat/kernel | <5.15.153 | 5.15.153 |
| redhat/kernel | <6.1.83 | 6.1.83 |
| redhat/kernel | <6.6.23 | 6.6.23 |
| redhat/kernel | <6.7.11 | 6.7.11 |
| redhat/kernel | <6.8.2 | 6.8.2 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb
- https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec
- https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4
- https://git.kernel.org/stable/c/7bcc090c81116c66936a7415f2c6b1483a4bcfd9
- https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699
- https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598
- https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68
- https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c
- https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d
- https://launchpad.net/bugs/cve/CVE-2024-26859
- https://access.redhat.com/security/cve/CVE-2024-26859
- https://lore.kernel.org/linux-cve-announce/2024041735-CVE-2024-26859-a906@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275734
- https://access.redhat.com/errata/RHSA-2024:4211
- https://access.redhat.com/errata/RHSA-2024:4352
- https://bugzilla.redhat.com/show_bug.cgi?id=2275733
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26859
- https://nvd.nist.gov/vuln/detail/CVE-2024-26859
- https://security-tracker.debian.org/tracker/CVE-2024-26859
- https://ubuntu.com/security/CVE-2024-26859
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/d27e2da94a42655861ca4baea30c8cd65546f25d
- agent/weakness
- agent/title
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-26859
- agent/software-canonical-lookup
- collector/nvd-api
- source/NVD
- collector/usn-cve
- source/Ubuntu
- collector/nvd-cve
- collector/security-tracker-debian
- source/Debian
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/description
- agent/softwarecombine
- agent/tags
- agent/event
- agent/trending
- package-manager/redhat
- package-manager/debian