{"id":"CVE-2024-49948","revision":"49eca0db58e04958a7dbeee1e07b3ce5","records":[{"revision":"49eca0db58e04958a7dbeee1e07b3ce5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-49948","aliases":[],"title":"net: add more sanity checks to qdisc_pkt_len_init()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: add more sanity checks to qdisc_pkt_len_init()\n\nOne path takes care of SKB_GSO_DODGY, assuming\nskb->len is bigger than hdr_len.\n\nvirtio_net_hdr_to_skb() does not fully dissect TCP headers,\nit only make sure it is at least 20 bytes.\n\nIt is possible for an user to provide a malicious 'GSO' packet,\ntotal length of 80 bytes.\n\n- 20 bytes of IPv4 header\n- 60 bytes TCP header\n- a small gso_size like 8\n\nvirtio_net_hdr_to_skb() would declare this packet as a normal\nGSO packet, because it would see 40 bytes of payload,\nbigger than gso_size.\n\nWe need to make detect this case to not underflow\nqdisc_skb_cb(skb)->pkt_len.","state":0,"publishedAt":"2024-10-21T18:02:05.121+00:00","modifiedAt":"2026-10-15T00:54:48.613+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"d7d1a28f5dd57b4d83def876f8d7b4403bd37df9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"473426a1d53a68dd1e718e6cd00d57936993fa6c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"566a931a1436d0e0ad13708ea55479b95426213c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"2415f465730e48b6e38da1c7c097317bf5dd2d20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"9b0ee571d20a238a22722126abdfde61f1b2bdd0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"1eebe602a8d8264a12e35e39d0645fa88dbbacdd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1def9238d4aa2146924994aa4b7dc861f03b9362\",\n                            \"lessThan\": \"ab9a9a9e9647392a19e7a885b08000e89c86b535\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/core/dev.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.323\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.285\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.227\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.168\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.113\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.55\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.10.14\",\n                            \"lessThanOrEqual\": \"6.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.11.3\",\n                            \"lessThanOrEqual\": \"6.11.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9","https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c","https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c","https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20","https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4","https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0","https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2","https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd","https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-49948","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-49948","identifiers":["CVE-2024-49948"]},"retained":false,"historicalAffected":[]}],"coverage":[]}