{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-49776 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2022-49776 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2022-49776 and fix it if it is affected.\n\nWhat it is: CVE-2022-49776 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2022-49776 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2022-49776/ (Markdown: https://insights.sbomify.com/CVE-2022-49776/index.md)","id":"CVE-2022-49776","markdown":"https://insights.sbomify.com/CVE-2022-49776/index.md","name":"CVE-2022-49776","record":{"aliases":["DEBIAN-CVE-2022-49776","GHSA-gpc4-vc7c-37hj","UBUNTU-CVE-2022-49776"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A missing MTU validation in the Linux kernel macvlan driver allows local attackers to crash the IPv6 stack by setting an invalid MTU.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: enforce a consistent minimal mtu\n\nmacvlan should enforce a minimal mtu of 68, even at link creation.\n\nThis patch avoids the current behavior (which could lead to crashes\nin ipv6 stack if the link is brought up)\n\n$ ip link add macvlan1 link eno1 mtu 8 type macvlan  # This should fail !\n$ ip link sh dev macvlan1\n5: macvlan1@eno1: \u003cBROADCAST,MULTICAST\u003e mtu 8 qdisc noop\n    state DOWN mode DEFAULT group default qlen 1000\n    link/ether 02:47:6c:24:74:82 brd ff:ff:ff:ff:ff:ff\n$ ip link set macvlan1 mtu 67\nError: mtu less than device minimum.\n$ ip link set macvlan1 mtu 68\n$ ip link set macvlan1 mtu 8\nError: mtu less than device minimum.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"macvlan: enforce a consistent minimal mtu","id":"CVE-2022-49776","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2022"},"n_packages":0,"n_references":7,"next":{"headline":"Input: i8042 - fix leaking of platform device on module removal","id":"CVE-2022-49777"},"packages":[],"prev":{"headline":"tcp: cdg: allow tcp_cdg_release() to be called multiple times","id":"CVE-2022-49775"},"products":["Linux"],"published":"2025-05-01","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A missing MTU validation in the Linux kernel macvlan driver allows local attackers to crash the IPv6 stack by setting an invalid MTU.","url":"https://insights.sbomify.com/CVE-2022-49776/"}