CVE-2025-38526 (GCVE-0-2025-38526)
Vulnerability from cvelistv5 – Published: 2025-08-16 11:12 – Updated: 2026-10-15 21:52
VLAI
EPSS
VEX
Title
ice: add NULL check in eswitch lag check
Summary
In the Linux kernel, the following vulnerability has been resolved:
ice: add NULL check in eswitch lag check
The function ice_lag_is_switchdev_running() is being called from outside of
the LAG event handler code. This results in the lag->upper_netdev being
NULL sometimes. To avoid a NULL-pointer dereference, there needs to be a
check before it is dereferenced.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:51 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
776fe19953b0e0af00399e50fb3b205101d4b3c1 , < 27591d926191e42b2332e4bad3bcd3a49def393b
(git)
Affected: 776fe19953b0e0af00399e50fb3b205101d4b3c1 , < 5a5d64f0eec82076b2c09fee2195d640cfbe3379 (git) Affected: 776fe19953b0e0af00399e50fb3b205101d4b3c1 , < 245917d3c5ed7c6ae720302b64eac5c6f0c85177 (git) Affected: 776fe19953b0e0af00399e50fb3b205101d4b3c1 , < 3ce58b01ada408b372f15b7c992ed0519840e3cf (git) |
guessed | |
| Linux | Linux |
Affected:
6.6
Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.100 , ≤ 6.6.* (semver) Unaffected: 6.12.40 , ≤ 6.12.* (semver) Unaffected: 6.15.8 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
guessed |
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"lessThan": "3ce58b01ada408b372f15b7c992ed0519840e3cf",
"status": "affected",
"version": "776fe19953b0e0af00399e50fb3b205101d4b3c1",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/intel/ice/ice_lag.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"lessThan": "6.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"version": "6.15.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.100",
"versionStartIncluding": "6.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.40",
"versionStartIncluding": "6.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.8",
"versionStartIncluding": "6.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16",
"versionStartIncluding": "6.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003eupper_netdev being\nNULL sometimes. To avoid a NULL-pointer dereference, there needs to be a\ncheck before it is dereferenced."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"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 \u2014 ARP, ICMP echo, TCP SYN-ACK/RST \u2014 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 \u2014 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\u0027s traffic.\nS:U - The fault and its impact are both in the host kernel\u0027s own security authority \u2014 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 \u2014 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:02:39.169Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38526",
"datePublished": "2025-08-16T11:12:20.036Z",
"dateReserved": "2025-04-16T04:51:24.023Z",
"dateUpdated": "2026-10-15T21:52:18.578Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.