{"id":"CVE-2022-49975","state":"PUBLISHED","title":"bpf: Don't redirect packets with invalid pkt_len","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Don't 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->head 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.","publishedAt":"2025-06-18T11:00:38.157Z","updatedAt":"2026-05-11T19:10:19.182Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"8b68e53d56697a59b5c53893b53f508bbdf272a0","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"6204bf78b2a903b96ba43afff6abc0b04d6e0462","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"a75987714bd2d8e59840667a28e15c1fa5c47554","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"72f2dc8993f10262092745a88cb2dd0fef094f23","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"fd1894224407c484f652ad456e1ce423e89bb3eb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skbuff.h","net/bpf/test_run.c","net/core/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"5.4.212","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.141","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.65","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.7","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skbuff.h","net/bpf/test_run.c","net/core/dev.c"]}],"references":["https://git.kernel.org/stable/c/8b68e53d56697a59b5c53893b53f508bbdf272a0","https://git.kernel.org/stable/c/6204bf78b2a903b96ba43afff6abc0b04d6e0462","https://git.kernel.org/stable/c/a75987714bd2d8e59840667a28e15c1fa5c47554","https://git.kernel.org/stable/c/72f2dc8993f10262092745a88cb2dd0fef094f23","https://git.kernel.org/stable/c/fd1894224407c484f652ad456e1ce423e89bb3eb"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49975.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49975","state":"PUBLISHED","datePublished":"2025-06-18T11:00:38.157Z","dateUpdated":"2026-05-11T19:10:19.182Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-06-18T10:57:27.385Z"},"containers":{"cna":{"title":"bpf: Don't redirect packets with invalid pkt_len","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Don't 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->head 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"8b68e53d56697a59b5c53893b53f508bbdf272a0","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"6204bf78b2a903b96ba43afff6abc0b04d6e0462","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"a75987714bd2d8e59840667a28e15c1fa5c47554","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"72f2dc8993f10262092745a88cb2dd0fef094f23","versionType":"git"},{"version":"5293efe62df81908f2e90c9820c7edcc8e61f5e9","status":"affected","lessThan":"fd1894224407c484f652ad456e1ce423e89bb3eb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skbuff.h","net/bpf/test_run.c","net/core/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"5.4.212","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.141","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.65","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.7","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/skbuff.h","net/bpf/test_run.c","net/core/dev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8b68e53d56697a59b5c53893b53f508bbdf272a0"},{"url":"https://git.kernel.org/stable/c/6204bf78b2a903b96ba43afff6abc0b04d6e0462"},{"url":"https://git.kernel.org/stable/c/a75987714bd2d8e59840667a28e15c1fa5c47554"},{"url":"https://git.kernel.org/stable/c/72f2dc8993f10262092745a88cb2dd0fef094f23"},{"url":"https://git.kernel.org/stable/c/fd1894224407c484f652ad456e1ce423e89bb3eb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:10:19.182Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.4.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.10.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.15.65"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"5.19.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9","versionEndExcluding":"6.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}