cve-2024-40909
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2024-11-05 09:32
Severity ?
Summary
bpf: Fix a potential use-after-free in bpf_link_free()
Impacted products
Vendor Product Version
Linux Linux Version: 6.9
Show details on NVD website


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                "id": "CVE-2024-40909",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:06:09.099919Z",
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    "cna": {
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          "product": "Linux",
          "programFiles": [
            "kernel/bpf/syscall.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix a potential use-after-free in bpf_link_free()\n\nAfter commit 1a80dbcb2dba, bpf_link can be freed by\nlink-\u003eops-\u003edealloc_deferred, but the code still tests and uses\nlink-\u003eops-\u003edealloc afterward, which leads to a use-after-free as\nreported by syzbot. Actually, one of them should be sufficient, so\njust call one of them instead of both. Also add a WARN_ON() in case\nof any problematic implementation."
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          "url": "https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a"
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      "title": "bpf: Fix a potential use-after-free in bpf_link_free()",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40909",
    "datePublished": "2024-07-12T12:20:48.447Z",
    "dateReserved": "2024-07-12T12:17:45.580Z",
    "dateUpdated": "2024-11-05T09:32:55.741Z",
    "state": "PUBLISHED"
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