CriticalFix available
batman-adv: access unicast_ttvn skb->data only after skb realloc
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.261, 5.15.212, 6.1.178, 6.12.97, 6.18.40, 6.6.145, 7.1.5
- CVEs
- CVE-2026-72234
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:25 UTC · Revision 1
Source evidence
batman-adv: access unicast_ttvn skb->data only after skb realloc
core-osv · Original sourcePublished 15 Aug 2026, 05:54 UTC
In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.
osv:CVE-2026-72234
Kernel
Fixed versions: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
Complete source record
{
"id": "91128305be874b41ba8f9fd9357f51e33a35924e24915bc5a393bb3d83c74a22",
"url": "https://osv.dev/vulnerability/CVE-2026-72234",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "batman-adv: access unicast_ttvn skb->data only after skb realloc",
"summary": "In the Linux kernel, the following vulnerability has been resolved: batman-adv: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the ethernet header but missed for the unicast_packet pointer.",
"evidence": "osv:CVE-2026-72234",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.261",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.212",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.178",
"evidence": "/affected/1/ranges"
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{
"value": "6.6.145",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.97",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.40",
"evidence": "/affected/1/ranges"
},
{
"value": "7.1.5",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CVE-2026-72234",
"aliases": [
"CVE-2026-72234"
],
"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": [
{
"ranges": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
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{
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{
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{
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}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72234.json"
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},
{
"ranges": [
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"type": "ECOSYSTEM",
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
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{
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
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{
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]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.1.5"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72234.json"
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],
"modified": "2026-10-28T02:30:32.433439180Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9",
"https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f",
"https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587",
"https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af",
"https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4",
"https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736",
"https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a",
"https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72234.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-72234",
"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/2026/72xxx/CVE-2026-72234.json"
}
},
"related_cves": [
{
"value": "CVE-2026-72234",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499665,
"published_at": "2026-08-15T05:54:24.395+00:00"
}