CVE-2022-49975 (GCVE-0-2022-49975)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2025-12-23 13:26
VLAI?
Title
bpf: Don't redirect packets with invalid pkt_len
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Don't redirect packets with invalid pkt_len Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any skbs, that is, the flow->head is null. The root cause, as the [2] says, is because that bpf_prog_test_run_skb() run a bpf prog which redirects empty skbs. So we should determine whether the length of the packet modified by bpf prog or others like bpf_prog_test is valid before forwarding it directly.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5293efe62df81908f2e90c9820c7edcc8e61f5e9 , < 8b68e53d56697a59b5c53893b53f508bbdf272a0 (git)
Affected: 5293efe62df81908f2e90c9820c7edcc8e61f5e9 , < 6204bf78b2a903b96ba43afff6abc0b04d6e0462 (git)
Affected: 5293efe62df81908f2e90c9820c7edcc8e61f5e9 , < a75987714bd2d8e59840667a28e15c1fa5c47554 (git)
Affected: 5293efe62df81908f2e90c9820c7edcc8e61f5e9 , < 72f2dc8993f10262092745a88cb2dd0fef094f23 (git)
Affected: 5293efe62df81908f2e90c9820c7edcc8e61f5e9 , < fd1894224407c484f652ad456e1ce423e89bb3eb (git)
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    Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.4.212 , ≤ 5.4.* (semver)
Unaffected: 5.10.141 , ≤ 5.10.* (semver)
Unaffected: 5.15.65 , ≤ 5.15.* (semver)
Unaffected: 5.19.7 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Don\u0027t redirect packets with invalid pkt_len\n\nSyzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any\nskbs, that is, the flow-\u003ehead is null.\nThe root cause, as the [2] says, is because that bpf_prog_test_run_skb()\nrun a bpf prog which redirects empty skbs.\nSo we should determine whether the length of the packet modified by bpf\nprog or others like bpf_prog_test is valid before forwarding it directly."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:26:14.542Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/fd1894224407c484f652ad456e1ce423e89bb3eb"
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      "title": "bpf: Don\u0027t redirect packets with invalid pkt_len",
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    "cveId": "CVE-2022-49975",
    "datePublished": "2025-06-18T11:00:38.157Z",
    "dateReserved": "2025-06-18T10:57:27.385Z",
    "dateUpdated": "2025-12-23T13:26:14.542Z",
    "state": "PUBLISHED"
  },
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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