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tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: tipc: fix null-ptr-deref when acquiring remote ip of ethernet bearer The reproduction steps: 1. create a tun interface 2. enable l2 bearer 3. TIPC_NL_UDP_GET_REMOTEIP with media name set to tun tipc: Started in network mode tipc: Node identity 8af312d38a21, cluster identity 4711 tipc: Enabled bearer , priority 1 Oops: general protection fault KASAN: null-ptr-deref in range CPU: 1 UID: 1000 PID: 559 Comm: poc Not tainted 6.16.0-rc1+ #117 PREEMPT Hardware name: QEMU Ubuntu 24.04 PC RIP: 0010:tipc_udp_nl_dump_remoteip+0x4a4/0x8f0 the ub was in fact a struct dev. when bid != 0 && skip_cnt != 0, bearer_list[bid] may be NULL or other media when other thread changes it. fix this by checking media_id.

Announced Source revision 1
Original source ↗

CVE-2025-38184

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-2025-38184

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": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "3998283e4c32c0fe69edd59b0876c193f50abce6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "c2e17984752b9131061d1a2ca1199da2706337fd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "8595350615f952fcf8bc861464a6bf6b1129af50",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "05d332ba075753d569d66333d62d60fff5f57ad8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "d3dfe821dfe091c0045044343c8d86596d66e2cf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "0d3d91c3500f0c480e016faa4e2259c588616e59",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "0f4a72fb266e48dbe928e1d936eab149e4ac3e1b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "832629ca5c313e122b22b8e73a6d80f111b1a1ae",
        "lessThan": "f82727adcf2992822e12198792af450a76ebd5ef",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/tipc/udp_media.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.4.295",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.239",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.186",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.142",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.35",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.15.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.16",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/tipc/udp_media.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-38184

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#30538 · Revision 1
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Publisher date
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