{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49776", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:17:33.805Z", "datePublished": "2025-05-01T14:09:12.572Z", "dateUpdated": "2025-05-04T08:45:07.682Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:45:07.682Z"}, "descriptions": [{"lang": "en", "value": "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: <BROADCAST,MULTICAST> 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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/macvlan.c"], "versions": [{"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "d2fee7d121d189c6dc905b727d60e7043a6655bb", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "650137a7c0b2892df2e5b0bc112d7b09a78c93c8", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "a62aa84fe19eb24d083d600a074c009a0a66d4f3", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "e929ec98c0c3b10d9c07f3776df0c1a02d7a763e", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "e41cbf98df22d08402e65174d147cbb187fe1a33", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "2b055c719d8f94c15ec9b7659978133030c6a353", "status": "affected", "versionType": "git"}, {"version": "91572088e3fdbf4fe31cf397926d8b890fdb3237", "lessThan": "b64085b00044bdf3cd1c9825e9ef5b2e0feae91a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/macvlan.c"], "versions": [{"version": "4.10", "status": "affected"}, {"version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.300", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.267", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.225", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.156", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.80", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.10", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "4.14.300"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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{"url": "https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3"}, {"url": "https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e"}, {"url": "https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33"}, {"url": "https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353"}, {"url": "https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a"}], "title": "macvlan: enforce a consistent minimal mtu", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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: <BROADCAST,MULTICAST> 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."}], "id": "CVE-2022-49776", "lastModified": "2025-05-02T13:53:20.943", "metrics": {}, "published": "2025-05-01T15:16:00.763", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e41cbf98df22d08402e65174d147cbb187fe1a33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: macvlan: enforce a consistent minimal mtu", "id": "2363390", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363390"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmacvlan: enforce a consistent minimal mtu\nmacvlan should enforce a minimal mtu of 68, even at link creation.\nThis patch avoids the current behavior (which could lead to crashes\nin ipv6 stack if the link is brought up)\n$ ip link add macvlan1 link eno1 mtu 8 type macvlan # This should fail !\n$ ip link sh dev macvlan1\n5: macvlan1@eno1: <BROADCAST,MULTICAST> mtu 8 qdisc noop\nstate DOWN mode DEFAULT group default qlen 1000\nlink/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."], "name": "CVE-2022-49776", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49776\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49776\nhttps://lore.kernel.org/linux-cve-announce/2025050117-CVE-2022-49776-6054@gregkh/T"], "statement": "A flaw in the macvlan driver allowed creation of interfaces with an MTU below the minimum required by IPv6, potentially leading to a kernel crash when bringing the interface up. Exploitation requires administrative privileges and affects availability only.", "threat_severity": "Moderate"}