CVE-2025-39764 (GCVE-0-2025-39764)
Vulnerability from cvelistv5
Published
2025-09-11 16:52
Modified
2025-09-11 16:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: remove refcounting in expectation dumpers Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption. AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use)) to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1492e3dcb2be3aa46d1963da96aa9593e4e4db5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4d634ded4d3d400f115d84f654f316f249531c9
Impacted products
Vendor Product Version
Linux Linux Version: cf6994c2b9812a9f02b99e89df411ffc5db9c779
Version: cf6994c2b9812a9f02b99e89df411ffc5db9c779
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   Linux Linux Version: 2.6.23
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          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_netlink.c"
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      "providerMetadata": {
        "dateUpdated": "2025-09-11T16:52:32.060Z",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39764",
    "datePublished": "2025-09-11T16:52:32.060Z",
    "dateReserved": "2025-04-16T07:20:57.126Z",
    "dateUpdated": "2025-09-11T16:52:32.060Z",
    "state": "PUBLISHED"
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}


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