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af_key: validate families in pfkey_send_migrate()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: af_key: validate families in pfkey_send_migrate() syzbot was able to trigger a crash in skb_put() [1] Issue is that pfkey_send_migrate() does not check old/new families, and that set_ipsecrequest() @family argument was truncated, thus possibly overfilling the skb. Validate families early, do not wait set_ipsecrequest(). [1] skbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev: kernel BUG at net/core/skbuff.c:214 ! Call Trace: skb_over_panic net/core/skbuff.c:219 [inline] skb_put+0x159/0x210 net/core/skbuff.c:2655 skb_put_zero include/linux/skbuff.h:2788 [inline] set_ipsecrequest net/key/af_key.c:3532 [inline] pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636 km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848 xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705 xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150

Announced Source revision 1
Original source ↗

CVE-2026-31515

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-2026-31515

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": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "d0c5aa8dd38887714f1aad04236a3620b56a5e4e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "e06b596fc4eb01936a2e5dccad17c946d660bab8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "8ddf8de7e758f6888988467af9ffc8adf589fb16",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "d3225e6b9bd51ec177970a628fe4b11237ce87d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "7b18692c59afb8e5c364c8e3ac01e51dd6b52028",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "83f644ea92987c100b82d8481ae2230faeed3d34",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "ee836e820a40e2ca4da8af7310bff92d586772d4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
        "lessThan": "eb2d16a7d599dc9d4df391b5e660df9949963786",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/key/af_key.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.21"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.21",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.168",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.131",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.80",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.21",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.11",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/key/af_key.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31515

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28288 · Revision 1
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Publisher date
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