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batman-adv: access unicast_ttvn skb->data only after skb realloc

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-72234

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-72234

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "aa9558af859934f24717d4bab97d61004f91a736",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "9c2c05629e46c1fd43931506d41c56a885a98eb4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "7b162b36de750565404cd3b98315706622c6974f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "ed90eb5c68420cdfe67ec1f773324198d2ef6f50",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "979175834a699ccc3c4c0b0ba60ecae0f135a587",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "b8afcf799b2cc92c41beebd029e53ed18960184a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "9a7b7248798123efbd5fafe58461d57c7cc718af",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a",
        "lessThan": "7141990add3f75436f2933cb310654cad3b1e3e9",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/batman-adv/routing.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/batman-adv/routing.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72234

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#32981 · Revision 1
Added to Heist Feed
Publisher date
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