{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38526", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.023Z", "datePublished": "2025-08-16T11:12:20.036Z", "dateUpdated": "2026-08-05T12:02:39.169Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:02:39.169Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: add NULL check in eswitch lag check\n\nThe function ice_lag_is_switchdev_running() is being called from outside of\nthe LAG event handler code. This results in the lag->upper_netdev being\nNULL sometimes. To avoid a NULL-pointer dereference, there needs to be a\ncheck before it is dereferenced." } ], "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 function sits directly in the ice per-packet TX datapath (`ice_xmit_frame_ring()`), so any inbound packet that elicits a kernel-generated reply — ARP, ICMP echo, TCP SYN-ACK/RST — drives the host into the NULL dereference from the network. ice is the 100G NIC used in internet-facing cloud and datacenter servers, so a remote unauthenticated peer can reach the faulting code.\nAC:L - Once the affected configuration is present (SRIOV-LAG-capable PF not enslaved in a bond, which is the default post-probe state), the dereference is deterministic on the very next transmit — no race to win, no memory layout to groom, no packet content requirements.\nPR:N - Reaching `ice_xmit_frame_ring()` requires no credentials at all: a remote peer needs only to send a packet the host answers, and locally any unprivileged process calling `sendto()` on the interface suffices. No capability, namespace, or authentication check exists anywhere on that path.\nUI:N - No victim action is needed; the crash occurs during ordinary packet transmission driven entirely by the attacker's traffic.\nS:U - The fault and its impact are both in the host kernel's own security authority — a standard kernel oops with no crossing of a VM, IOMMU, or sandbox boundary. The one VF-originated path (`virtchnl` promiscuous-mode) is gated behind trusted-VF status, so no guest-to-host boundary crossing is established.\nC:N - This is a read of `nd_net` at a small fixed offset from a NULL pointer; the faulting address is not attacker-influenced and the value is never returned to userspace or the wire, so no information is disclosed.\nI:N - No memory is written, no object is freed or reused, and no type confusion occurs — the bug is a pure read fault with no path to modifying kernel state.\nA:H - The NULL dereference occurs in the transmit/softirq path and produces a kernel oops or panic, taking down the networking datapath and typically the whole system, and it re-triggers on every subsequent transmit attempt." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/ice/ice_lag.c" ], "versions": [ { "version": "776fe19953b0e0af00399e50fb3b205101d4b3c1", "lessThan": "27591d926191e42b2332e4bad3bcd3a49def393b", "status": "affected", "versionType": "git" }, { "version": "776fe19953b0e0af00399e50fb3b205101d4b3c1", "lessThan": "5a5d64f0eec82076b2c09fee2195d640cfbe3379", "status": "affected", "versionType": "git" }, { "version": "776fe19953b0e0af00399e50fb3b205101d4b3c1", "lessThan": "245917d3c5ed7c6ae720302b64eac5c6f0c85177", "status": "affected", "versionType": "git" }, { "version": "776fe19953b0e0af00399e50fb3b205101d4b3c1", "lessThan": "3ce58b01ada408b372f15b7c992ed0519840e3cf", "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/intel/ice/ice_lag.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.100", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.40", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.8", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "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": "6.6", "versionEndExcluding": "6.6.100" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.15.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/27591d926191e42b2332e4bad3bcd3a49def393b" }, { "url": "https://git.kernel.org/stable/c/5a5d64f0eec82076b2c09fee2195d640cfbe3379" }, { "url": "https://git.kernel.org/stable/c/245917d3c5ed7c6ae720302b64eac5c6f0c85177" }, { "url": "https://git.kernel.org/stable/c/3ce58b01ada408b372f15b7c992ed0519840e3cf" } ], "title": "ice: add NULL check in eswitch lag check", "x_generator": { "engine": "bippy-1.2.0" } } } }