{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50253", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T13:58:00.973Z", "datePublished": "2025-09-15T14:02:34.849Z", "dateUpdated": "2026-05-11T19:15:44.305Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:15:44.305Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: make sure skb->len != 0 when redirecting to a tunneling device\n\nsyzkaller managed to trigger another case where skb->len == 0\nwhen we enter __dev_queue_xmit:\n\nWARNING: CPU: 0 PID: 2470 at include/linux/skbuff.h:2576 skb_assert_len include/linux/skbuff.h:2576 [inline]\nWARNING: CPU: 0 PID: 2470 at include/linux/skbuff.h:2576 __dev_queue_xmit+0x2069/0x35e0 net/core/dev.c:4295\n\nCall Trace:\n dev_queue_xmit+0x17/0x20 net/core/dev.c:4406\n __bpf_tx_skb net/core/filter.c:2115 [inline]\n __bpf_redirect_no_mac net/core/filter.c:2140 [inline]\n __bpf_redirect+0x5fb/0xda0 net/core/filter.c:2163\n ____bpf_clone_redirect net/core/filter.c:2447 [inline]\n bpf_clone_redirect+0x247/0x390 net/core/filter.c:2419\n bpf_prog_48159a89cb4a9a16+0x59/0x5e\n bpf_dispatcher_nop_func include/linux/bpf.h:897 [inline]\n __bpf_prog_run include/linux/filter.h:596 [inline]\n bpf_prog_run include/linux/filter.h:603 [inline]\n bpf_test_run+0x46c/0x890 net/bpf/test_run.c:402\n bpf_prog_test_run_skb+0xbdc/0x14c0 net/bpf/test_run.c:1170\n bpf_prog_test_run+0x345/0x3c0 kernel/bpf/syscall.c:3648\n __sys_bpf+0x43a/0x6c0 kernel/bpf/syscall.c:5005\n __do_sys_bpf kernel/bpf/syscall.c:5091 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5089 [inline]\n __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5089\n do_syscall_64+0x54/0x70 arch/x86/entry/common.c:48\n entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nThe reproducer doesn't really reproduce outside of syzkaller\nenvironment, so I'm taking a guess here. It looks like we\ndo generate correct ETH_HLEN-sized packet, but we redirect\nthe packet to the tunneling device. Before we do so, we\n__skb_pull l2 header and arrive again at skb->len == 0.\nDoesn't seem like we can do anything better than having\nan explicit check after __skb_pull?" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/filter.c" ], "versions": [ { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "ffbccc5fb0a67424e12f7f8da210c04c8063f797", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "e6a63203e5a90a39392fa1a7ffc60f5e9baf642a", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "772431f30ca040cfbf31b791d468bac6a9ca74d3", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "6d935a02658be82585ecb39aab339faa84496650", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "5d3f4478d22b2cb1810f6fe0f797411e9d87b3e5", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "1b65704b8c08ae92db29f720d3b298031131da53", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "f186303845a01cc7e991f9dc51d7e5a3cdc7aedb", "status": "affected", "versionType": "git" }, { "version": "4e3264d21b90984c2165e8fe5a7b64cf25bc2c2d", "lessThan": "07ec7b502800ba9f7b8b15cb01dd6556bb41aaca", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/filter.c" ], "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.303", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "4.9", "versionEndExcluding": "4.14.303" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "4.19.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.4.229" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.0.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ffbccc5fb0a67424e12f7f8da210c04c8063f797" }, { "url": "https://git.kernel.org/stable/c/e6a63203e5a90a39392fa1a7ffc60f5e9baf642a" }, { "url": "https://git.kernel.org/stable/c/772431f30ca040cfbf31b791d468bac6a9ca74d3" }, { "url": "https://git.kernel.org/stable/c/6d935a02658be82585ecb39aab339faa84496650" }, { "url": "https://git.kernel.org/stable/c/5d3f4478d22b2cb1810f6fe0f797411e9d87b3e5" }, { "url": "https://git.kernel.org/stable/c/1b65704b8c08ae92db29f720d3b298031131da53" }, { "url": "https://git.kernel.org/stable/c/f186303845a01cc7e991f9dc51d7e5a3cdc7aedb" }, { "url": "https://git.kernel.org/stable/c/07ec7b502800ba9f7b8b15cb01dd6556bb41aaca" } ], "title": "bpf: make sure skb->len != 0 when redirecting to a tunneling device", "x_generator": { "engine": "bippy-1.2.0" } } } }