CVE-2026-43199 (GCVE-0-2026-43199)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-08-05 12:26
VLAI
EPSS
VEX
Title
net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query
Fix a "scheduling while atomic" bug in mlx5e_ipsec_init_macs() by
replacing mlx5_query_mac_address() with ether_addr_copy() to get the
local MAC address directly from netdev->dev_addr.
The issue occurs because mlx5_query_mac_address() queries the hardware
which involves mlx5_cmd_exec() that can sleep, but it is called from
the mlx5e_ipsec_handle_event workqueue which runs in atomic context.
The MAC address is already available in netdev->dev_addr, so no need
to query hardware. This avoids the sleeping call and resolves the bug.
Call trace:
BUG: scheduling while atomic: kworker/u112:2/69344/0x00000200
__schedule+0x7ab/0xa20
schedule+0x1c/0xb0
schedule_timeout+0x6e/0xf0
__wait_for_common+0x91/0x1b0
cmd_exec+0xa85/0xff0 [mlx5_core]
mlx5_cmd_exec+0x1f/0x50 [mlx5_core]
mlx5_query_nic_vport_mac_address+0x7b/0xd0 [mlx5_core]
mlx5_query_mac_address+0x19/0x30 [mlx5_core]
mlx5e_ipsec_init_macs+0xc1/0x720 [mlx5_core]
mlx5e_ipsec_build_accel_xfrm_attrs+0x422/0x670 [mlx5_core]
mlx5e_ipsec_handle_event+0x2b9/0x460 [mlx5_core]
process_one_work+0x178/0x2e0
worker_thread+0x2ea/0x430
Severity
7.5 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cee137a634318bfbda18ee5af45d300153b57fa5 , < e1407fb7c337373dfaaae2445d828b0b9ae26a29
(git)
Affected: cee137a634318bfbda18ee5af45d300153b57fa5 , < 57957bc7f1865778ec9b1618e15515feb6df7eb4 (git) Affected: cee137a634318bfbda18ee5af45d300153b57fa5 , < 546de94e41e92e1f7dc6213615fb7c794d05db98 (git) Affected: cee137a634318bfbda18ee5af45d300153b57fa5 , < 859380694f434597407632c29f30fdb5e763e6cc (git) |
guessed | |
| Linux | Linux |
Affected:
6.2
Unaffected: 0 , < 6.2 (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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}
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}
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"dateReserved": "2026-05-01T14:12:55.992Z",
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"id": "CVE-2026-43199",
"lastModified": "2026-06-17T10:49:08.340",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43199.json",
"version": "3"
},
"suse_vex": {
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"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-43199",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43199.json",
"version": "13"
}
}
}
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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.
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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.
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