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CVE-2025-21974— eth: bnxt: return fail if interface is down in bnxt_queue_mem_alloc()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于eth bnxt模块在接口关闭时分配队列内存。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.19% · P8

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 2d694c27d32efc9467a8a20e4ad641ab5adfd07d< 14eb5f0d6554653f4b159835c2f77b2a9bd7e9be affected
2d694c27d32efc9467a8a20e4ad641ab5adfd07d< d3b8cd8a8a98c7c83a693bd651f1919be36a57f2 affected
2d694c27d32efc9467a8a20e4ad641ab5adfd07d< ca2456e073957781e1184de68551c65161b2bd30 affected
6.11 affected
< 6.11 unaffected
6.12.20≤ 6.12.* unaffected
6.13.8≤ 6.13.* unaffected
6.14≤ * unaffected
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I. Basic Information for CVE-2025-21974

Vulnerability Information
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Vulnerability Title
eth: bnxt: return fail if interface is down in bnxt_queue_mem_alloc()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: return fail if interface is down in bnxt_queue_mem_alloc() The bnxt_queue_mem_alloc() is called to allocate new queue memory when a queue is restarted. It internally accesses rx buffer descriptor corresponding to the index. The rx buffer descriptor is allocated and set when the interface is up and it's freed when the interface is down. So, if queue is restarted if interface is down, kernel panic occurs. Splat looks like: BUG: unable to handle page fault for address: 000000000000b240 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 UID: 0 PID: 1563 Comm: ncdevmem2 Not tainted 6.14.0-rc2+ #9 844ddba6e7c459cafd0bf4db9a3198e Hardware name: ASUS System Product Name/PRIME Z690-P D4, BIOS 0603 11/01/2021 RIP: 0010:bnxt_queue_mem_alloc+0x3f/0x4e0 [bnxt_en] Code: 41 54 4d 89 c4 4d 69 c0 c0 05 00 00 55 48 89 f5 53 48 89 fb 4c 8d b5 40 05 00 00 48 83 ec 15 RSP: 0018:ffff9dcc83fef9e8 EFLAGS: 00010202 RAX: ffffffffc0457720 RBX: ffff934ed8d40000 RCX: 0000000000000000 RDX: 000000000000001f RSI: ffff934ea508f800 RDI: ffff934ea508f808 RBP: ffff934ea508f800 R08: 000000000000b240 R09: ffff934e84f4b000 R10: ffff9dcc83fefa30 R11: ffff934e84f4b000 R12: 000000000000001f R13: ffff934ed8d40ac0 R14: ffff934ea508fd40 R15: ffff934e84f4b000 FS: 00007fa73888c740(0000) GS:ffff93559f780000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000b240 CR3: 0000000145a2e000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <TASK> ? __die+0x20/0x70 ? page_fault_oops+0x15a/0x460 ? exc_page_fault+0x6e/0x180 ? asm_exc_page_fault+0x22/0x30 ? __pfx_bnxt_queue_mem_alloc+0x10/0x10 [bnxt_en 7f85e76f4d724ba07471d7e39d9e773aea6597b7] ? bnxt_queue_mem_alloc+0x3f/0x4e0 [bnxt_en 7f85e76f4d724ba07471d7e39d9e773aea6597b7] netdev_rx_queue_restart+0xc5/0x240 net_devmem_bind_dmabuf_to_queue+0xf8/0x200 netdev_nl_bind_rx_doit+0x3a7/0x450 genl_family_rcv_msg_doit+0xd9/0x130 genl_rcv_msg+0x184/0x2b0 ? __pfx_netdev_nl_bind_rx_doit+0x10/0x10 ? __pfx_genl_rcv_msg+0x10/0x10 netlink_rcv_skb+0x54/0x100 genl_rcv+0x24/0x40 ...
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于eth bnxt模块在接口关闭时分配队列内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2d694c27d32efc9467a8a20e4ad641ab5adfd07d ~ 14eb5f0d6554653f4b159835c2f77b2a9bd7e9be -
Linux Linux 6.11 -

II. Public POCs for CVE-2025-21974

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III. Intelligence Information for CVE-2025-21974

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Patches & Fixes for CVE-2025-21974 (3)

Same Patch Batch · Linux · 2025-04-01 · 93 CVEs total

CVE-2025-21954 9.8 CRITICAL netmem: prevent TX of unreadable skbs
CVE-2025-21927 9.8 CRITICAL nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()
CVE-2025-21955 8.8 HIGH ksmbd: prevent connection release during oplock break notification
CVE-2025-21946 8.8 HIGH ksmbd: fix out-of-bounds in parse_sec_desc()
CVE-2025-21945 8.8 HIGH ksmbd: fix use-after-free in smb2_lock
CVE-2025-21969 8.8 HIGH Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmd
CVE-2025-21967 8.8 HIGH ksmbd: fix use-after-free in ksmbd_free_work_struct
CVE-2025-21972 8.8 HIGH net: mctp: unshare packets when reassembling
CVE-2025-21947 8.1 HIGH ksmbd: fix type confusion via race condition when using ipc_msg_send_request
CVE-2025-21896 7.8 HIGH fuse: revert back to __readahead_folio() for readahead
CVE-2025-21949 7.8 HIGH LoongArch: Set hugetlb mmap base address aligned with pmd size
CVE-2025-21899 7.8 HIGH tracing: Fix bad hist from corrupting named_triggers list
CVE-2025-21979 7.8 HIGH wifi: cfg80211: cancel wiphy_work before freeing wiphy
CVE-2025-21966 7.8 HIGH dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature
CVE-2025-21926 7.8 HIGH net: gso: fix ownership in __udp_gso_segment
CVE-2025-21965 7.8 HIGH sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()
CVE-2025-21924 7.8 HIGH net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an e
CVE-2025-21934 7.8 HIGH rapidio: fix an API misues when rio_add_net() fails
CVE-2025-21939 7.8 HIGH drm/xe/hmm: Don't dereference struct page pointers without notifier lock
CVE-2025-21958 7.8 HIGH Revert "openvswitch: switch to per-action label counting in conntrack"

Showing top 20 of 93 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21974

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