{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-21960", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.795Z", "datePublished": "2025-04-01T15:46:58.291Z", "dateUpdated": "2026-08-05T11:55:39.009Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:55:39.009Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: bnxt: do not update checksum in bnxt_xdp_build_skb()\n\nThe bnxt_rx_pkt() updates ip_summed value at the end if checksum offload\nis enabled.\nWhen the XDP-MB program is attached and it returns XDP_PASS, the\nbnxt_xdp_build_skb() is called to update skb_shared_info.\nThe main purpose of bnxt_xdp_build_skb() is to update skb_shared_info,\nbut it updates ip_summed value too if checksum offload is enabled.\nThis is actually duplicate work.\n\nWhen the bnxt_rx_pkt() updates ip_summed value, it checks if ip_summed\nis CHECKSUM_NONE or not.\nIt means that ip_summed should be CHECKSUM_NONE at this moment.\nBut ip_summed may already be updated to CHECKSUM_UNNECESSARY in the\nXDP-MB-PASS path.\nSo the by skb_checksum_none_assert() WARNS about it.\n\nThis is duplicate work and updating ip_summed in the\nbnxt_xdp_build_skb() is not needed.\n\nSplat looks like:\nWARNING: CPU: 3 PID: 5782 at ./include/linux/skbuff.h:5155 bnxt_rx_pkt+0x479b/0x7610 [bnxt_en]\nModules linked in: bnxt_re bnxt_en rdma_ucm rdma_cm iw_cm ib_cm ib_uverbs veth xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE nf_]\nCPU: 3 UID: 0 PID: 5782 Comm: socat Tainted: G W 6.14.0-rc4+ #27\nTainted: [W]=WARN\nHardware name: ASUS System Product Name/PRIME Z690-P D4, BIOS 0603 11/01/2021\nRIP: 0010:bnxt_rx_pkt+0x479b/0x7610 [bnxt_en]\nCode: 54 24 0c 4c 89 f1 4c 89 ff c1 ea 1f ff d3 0f 1f 00 49 89 c6 48 85 c0 0f 84 4c e5 ff ff 48 89 c7 e8 ca 3d a0 c8 e9 8f f4 ff ff <0f> 0b f\nRSP: 0018:ffff88881ba09928 EFLAGS: 00010202\nRAX: 0000000000000000 RBX: 00000000c7590303 RCX: 0000000000000000\nRDX: 1ffff1104e7d1610 RSI: 0000000000000001 RDI: ffff8881c91300b8\nRBP: ffff88881ba09b28 R08: ffff888273e8b0d0 R09: ffff888273e8b070\nR10: ffff888273e8b010 R11: ffff888278b0f000 R12: ffff888273e8b080\nR13: ffff8881c9130e00 R14: ffff8881505d3800 R15: ffff888273e8b000\nFS: 00007f5a2e7be080(0000) GS:ffff88881ba00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fff2e708ff8 CR3: 000000013e3b0000 CR4: 00000000007506f0\nPKRU: 55555554\nCall Trace:\n \n ? __warn+0xcd/0x2f0\n ? bnxt_rx_pkt+0x479b/0x7610\n ? report_bug+0x326/0x3c0\n ? handle_bug+0x53/0xa0\n ? exc_invalid_op+0x14/0x50\n ? asm_exc_invalid_op+0x16/0x20\n ? bnxt_rx_pkt+0x479b/0x7610\n ? bnxt_rx_pkt+0x3e41/0x7610\n ? __pfx_bnxt_rx_pkt+0x10/0x10\n ? napi_complete_done+0x2cf/0x7d0\n __bnxt_poll_work+0x4e8/0x1220\n ? __pfx___bnxt_poll_work+0x10/0x10\n ? __pfx_mark_lock.part.0+0x10/0x10\n bnxt_poll_p5+0x36a/0xfa0\n ? __pfx_bnxt_poll_p5+0x10/0x10\n __napi_poll.constprop.0+0xa0/0x440\n net_rx_action+0x899/0xd00\n...\n\nFollowing ping.py patch adds xdp-mb-pass case. so ping.py is going\nto be able to reproduce this issue." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable code is the bnxt_en receive path, reached purely by processing an inbound packet in NAPI/softirq context with no local access required. Jumbo frames of the required size are routable within datacenter fabrics and cloud VPCs, so an off-segment remote peer can deliver the triggering packet.\nAC:L - In an affected deployment the attacker triggers the assertion deterministically with a single ordinary oversized TCP/UDP packet carrying a valid L4 checksum — there is no race to win, no memory layout to groom, and no victim state to line up. The XDP-MB program and jumbo MTU are properties of whether the target is vulnerable at all, not extra effort the attacker must expend.\nPR:N - The trigger is an unauthenticated raw packet consumed by the NIC driver before any protocol-level authentication or socket ownership check. The attacker needs no account, credential, or capability on the target.\nUI:N - The packet is processed automatically by the NAPI poll loop as soon as it arrives on the wire. No administrator or user action is needed at exploitation time.\nS:U - The fault and its consequences are confined to the kernel of the receiving host, with no crossing of a VM, IOMMU, or sandbox boundary. This is a standard in-kernel driver defect.\nC:N - The defect is a redundant store of the exact value the driver writes moments later, so no out-of-bounds or freed memory is ever read and nothing is returned to the attacker. The remote attacker who triggers the splat has no channel to read the resulting dmesg output.\nI:N - No attacker-controlled data is written anywhere; the duplicated ip_summed/csum_level assignment stores the same hardware-derived values that bnxt_rx_pkt() stores unconditionally. There is no OOB write, type confusion, or control-flow primitive.\nA:H - Every qualifying inbound packet drives the kernel into a WARN splat in softirq context, which is an immediate kernel panic on the widely used panic_on_warn=1 configuration, taking the whole host down. Even short of panic it taints the kernel and aborts orderly processing from the interrupt path." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h" ], "versions": [ { "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "e8e3e03d69f2420eaa578199a65d281c58867105", "status": "affected", "versionType": "git" }, { "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "ee086c8e775f9690282e3d26471dbcfd5dad5a6a", "status": "affected", "versionType": "git" }, { "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "5b57ed14a1b85e7ab0074d9668a0baa6c94826c7", "status": "affected", "versionType": "git" }, { "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "44578bc6460b8fca530fc7bd5897c115d9bd27e2", "status": "affected", "versionType": "git" }, { "version": "1dc4c557bfedfcdf7fc0c46795857773b7ad66e7", "lessThan": "c03e7d05aa0e2f7e9a9ce5ad8a12471a53f941dc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h" ], "versions": [ { "version": "5.19", "status": "affected" }, { "version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.132", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.84", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.20", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.8", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.132" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.84" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.13.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e8e3e03d69f2420eaa578199a65d281c58867105" }, { "url": "https://git.kernel.org/stable/c/ee086c8e775f9690282e3d26471dbcfd5dad5a6a" }, { "url": "https://git.kernel.org/stable/c/5b57ed14a1b85e7ab0074d9668a0baa6c94826c7" }, { "url": "https://git.kernel.org/stable/c/44578bc6460b8fca530fc7bd5897c115d9bd27e2" }, { "url": "https://git.kernel.org/stable/c/c03e7d05aa0e2f7e9a9ce5ad8a12471a53f941dc" } ], "title": "eth: bnxt: do not update checksum in bnxt_xdp_build_skb()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:40:02.778Z" } } ] } }