HighFix available
batman-adv: retrieve ethhdr after potential skb realloc on RX
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() 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 VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.
- 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-2026-72235
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 11:15 UTC · Revision 1
Source evidence
batman-adv: retrieve ethhdr after potential skb realloc on RX
core-osv · Original sourcePublished 15 Aug 2026, 05:54 UTC
In the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() 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 VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.
osv:CVE-2026-72235
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": "d38b301a3a59aeb973e6c34632ace667ca07861a975d4a49f7357e89859cbf42",
"url": "https://osv.dev/vulnerability/CVE-2026-72235",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "batman-adv: retrieve ethhdr after potential skb realloc on RX",
"summary": "In the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() 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 VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.",
"evidence": "osv:CVE-2026-72235",
"products": [
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"name": {
"value": "Kernel",
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"prerequisites": [],
"fixed_versions": [
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"value": "5.10.261",
"evidence": "/affected/1/ranges"
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{
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{
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{
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"evidence": "/affected/1/ranges"
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{
"value": "6.18.40",
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{
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}
],
"affected_versions": []
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"severity": "high",
"structured": {
"id": "CVE-2026-72235",
"aliases": [
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"metrics": [
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"type": "CVSS_V3",
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}
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"affected": [
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{
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{
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"events": [
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{
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"events": [
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"introduced": "6.13.0"
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},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
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{
"fixed": "7.1.5"
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],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
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],
"modified": "2026-10-28T02:30:27.998110860Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644",
"https://git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d",
"https://git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6",
"https://git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012",
"https://git.kernel.org/stable/c/85a71a81854e0e191ad0e533eabb4eff54866feb",
"https://git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db",
"https://git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8",
"https://git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72235.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-72235",
"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-2026-72235.json"
}
},
"related_cves": [
{
"value": "CVE-2026-72235",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 494852,
"published_at": "2026-08-15T05:54:25.136+00:00"
}