CriticalFix available
smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.18.24, 6.19.14, 7.0.1
- CVEs
- CVE-2026-31608
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 00:54 UTC · Revision 1
Source evidence
smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()
core-osv · Original sourcePublished 24 Apr 2026, 14:42 UTC
In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.
osv:CVE-2026-31608
Kernel
Fixed versions: 6.18.24, 6.19.14, 7.0.1
Complete source record
{
"id": "c47f1c910f47076ae850809cf630541842186ffd7696f9a947a4167583845bc9",
"url": "https://osv.dev/vulnerability/CVE-2026-31608",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.",
"evidence": "osv:CVE-2026-31608",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
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"prerequisites": [],
"fixed_versions": [
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"evidence": "/affected/1/ranges"
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{
"value": "6.19.14",
"evidence": "/affected/1/ranges"
},
{
"value": "7.0.1",
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}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CVE-2026-31608",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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{
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"type": "GIT",
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{
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"v6.19.12",
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"v6.19.9",
"v6.19.8",
"v6.19.7",
"v6.19.6",
"v6.19.5",
"v6.19.4",
"v6.19.3",
"v6.19.2",
"v6.19.1"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31608.json"
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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"introduced": "0"
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{
"fixed": "6.18.24"
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},
{
"type": "ECOSYSTEM",
"events": [
{
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{
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{
"type": "ECOSYSTEM",
"events": [
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],
"package": {
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"ecosystem": "Linux"
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"database_specific": {
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}
}
],
"modified": "2026-10-28T02:30:32.628307987Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/2ba03f46132b0d1a7bafb86e1ef61951a2254023",
"https://git.kernel.org/stable/c/6968c91fab05b8fc4d6700e0cf34472bb422df25",
"https://git.kernel.org/stable/c/830de6eeb9db4cb7e758201fb99328ef4ca4b032",
"https://git.kernel.org/stable/c/84ff995ae826aa6bbcc6c7b9ea569ff67c021d72",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31608.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-31608",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31608.json"
}
},
"related_cves": [
{
"value": "CVE-2026-31608",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499378,
"published_at": "2026-04-24T14:42:30.137+00:00"
}