HighFix available
net: ncsi: fix skb leak in error paths
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.253, 5.15.203, 6.1.167, 6.12.78, 6.18.19, 6.19.9, 6.6.130
- CVEs
- CVE-2026-43373
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 23:18 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.
osv:CVE-2026-43373
Kernel
Fixed versions: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9
Complete source record
{
"id": "c065d0f2281cf4551de4a621b37f9e2410b87cab613a8400a6a64383eaed12a2",
"url": "https://osv.dev/vulnerability/CVE-2026-43373",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "net: ncsi: fix skb leak in error paths",
"summary": "In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.",
"evidence": "osv:CVE-2026-43373",
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"value": "5.10.253",
"evidence": "/affected/1/ranges"
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{
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"severity": "high",
"structured": {
"id": "CVE-2026-43373",
"aliases": [
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"metrics": [
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"modified": "2026-10-28T02:30:24.308048866Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a",
"https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4",
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"https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189",
"https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43373.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43373",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43373.json"
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"related_cves": [
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
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"source_id": "core-osv",
"document_id": 490828,
"published_at": "2026-05-08T14:21:23.875+00:00"
}