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xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst() On the error path where in6_dev_get(dev) returns NULL, xfrm6_fill_dst() releases the device reference with netdev_put() but leaves xdst->u.dst.dev set. dst_destroy() later calls netdev_put(dst->dev) again, so the same net_device reference is released twice, underflowing its refcount (ref_tracker WARNING + "unregister_netdevice: waiting for to become free"). Clear xdst->u.dst.dev after the netdev_put(), the same way the XFRM device-offload paths xfrm_dev_state_add() and xfrm_dev_policy_add() in net/xfrm/xfrm_device.c NULL ->dev when releasing the reference on error. ref_tracker: reference already released. ref_tracker: allocated in: xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:86) ... udpv6_sendmsg (net/ipv6/udp.c:1696) ... ref_tracker: freed in: xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:90) ... WARNING: lib/ref_tracker.c:322 at ref_tracker_free+0x58b/0x780 dst_destroy (net/core/dst.c:115) rcu_core handle_softirqs ...

Announced Source revision 1
Original source ↗

CVE-2026-64580

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-2026-64580

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": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "97e032e5733e49471fb73de117ea2ac1ac7c479a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "df6856c2dda9187601d29b5fbd7a81b3b178cedf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "43de8a49335e611adb271bbd52e84dfbc11fc185",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "ff636d7b7cba6dea82ecf580415ea57f2c1a11b6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "e078da1b4e11390cff3201c19a9a1fe70c5b934f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
        "lessThan": "136992de9bb91871084ae52d172610541c76e4d2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a7e22d0c0e81dde129a51ee413644124f4b59954",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "01b0d887f67a388fb2a658ee2bdd74e5ba146818",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a98124aac0b5adc5de8ae54f11322781cb4d85c3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e27b7bee743d921f037b1da6f071237345bef7c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.0.79",
        "lessThan": "3.1",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.2.46",
        "lessThan": "3.3",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.4.46",
        "lessThan": "3.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.9.3",
        "lessThan": "3.10",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/ipv6/xfrm6_policy.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv6/xfrm6_policy.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64580

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41097 · Revision 1
Added to Heist Feed
Publisher date
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