{"api_version":"1","generated_at":"2026-06-24T12:16:53+00:00","cve":"CVE-2026-52938","urls":{"html":"https://cve.report/CVE-2026-52938","api":"https://cve.report/api/cve/CVE-2026-52938.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52938","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52938"},"summary":{"title":"bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths\n\nbpf_selem_unlink_nofail() sets SDATA(selem)->smap to NULL before\nremoving the selem from the storage hlist. A concurrent RCU reader in\nbpf_sk_storage_clone() can observe the selem still on the list with\nsmap already NULL, causing a NULL pointer dereference.\n\n general protection fault, probably for non-canonical address 0xdffffc000000000a:\n KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]\n RIP: 0010:bpf_sk_storage_clone+0x1cd/0xaa0 net/core/bpf_sk_storage.c:174\n Call Trace:\n  <IRQ>\n  sk_clone+0xfed/0x1980 net/core/sock.c:2591\n  inet_csk_clone_lock+0x30/0x760 net/ipv4/inet_connection_sock.c:1222\n  tcp_create_openreq_child+0x35/0x2680 net/ipv4/tcp_minisocks.c:571\n  tcp_v4_syn_recv_sock+0x123/0xf90 net/ipv4/tcp_ipv4.c:1729\n  tcp_check_req+0x8e1/0x2580 include/net/tcp.h:855\n  tcp_v4_rcv+0x1845/0x3b80 net/ipv4/tcp_ipv4.c:2347\n\nAdd a NULL check for smap in bpf_sk_storage_clone().\n\nbpf_sk_storage_diag_put_all() has the same issue. Add a NULL check\nand pass the validated smap directly to diag_get(), which is refactored\nto take smap as a parameter instead of reading it internally.\n\nbpf_sk_storage_diag_put() uses diag->maps[i] which is always valid\nunder its refcount, so diag->maps[i] is passed directly to diag_get().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:24","updated_at":"2026-06-24 08:16:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/375e4e33c18dfa05c5dfd5f3dfffeb29343dd4c7","name":"https://git.kernel.org/stable/c/375e4e33c18dfa05c5dfd5f3dfffeb29343dd4c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52938","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52938","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5d800f87d0a5ea1b156c47a4b9fd128479335153 375e4e33c18dfa05c5dfd5f3dfffeb29343dd4c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/core/bpf_sk_storage.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"375e4e33c18dfa05c5dfd5f3dfffeb29343dd4c7","status":"affected","version":"5d800f87d0a5ea1b156c47a4b9fd128479335153","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/core/bpf_sk_storage.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths\n\nbpf_selem_unlink_nofail() sets SDATA(selem)->smap to NULL before\nremoving the selem from the storage hlist. A concurrent RCU reader in\nbpf_sk_storage_clone() can observe the selem still on the list with\nsmap already NULL, causing a NULL pointer dereference.\n\n general protection fault, probably for non-canonical address 0xdffffc000000000a:\n KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]\n RIP: 0010:bpf_sk_storage_clone+0x1cd/0xaa0 net/core/bpf_sk_storage.c:174\n Call Trace:\n  <IRQ>\n  sk_clone+0xfed/0x1980 net/core/sock.c:2591\n  inet_csk_clone_lock+0x30/0x760 net/ipv4/inet_connection_sock.c:1222\n  tcp_create_openreq_child+0x35/0x2680 net/ipv4/tcp_minisocks.c:571\n  tcp_v4_syn_recv_sock+0x123/0xf90 net/ipv4/tcp_ipv4.c:1729\n  tcp_check_req+0x8e1/0x2580 include/net/tcp.h:855\n  tcp_v4_rcv+0x1845/0x3b80 net/ipv4/tcp_ipv4.c:2347\n\nAdd a NULL check for smap in bpf_sk_storage_clone().\n\nbpf_sk_storage_diag_put_all() has the same issue. Add a NULL check\nand pass the validated smap directly to diag_get(), which is refactored\nto take smap as a parameter instead of reading it internally.\n\nbpf_sk_storage_diag_put() uses diag->maps[i] which is always valid\nunder its refcount, so diag->maps[i] is passed directly to diag_get()."}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:27.952Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/375e4e33c18dfa05c5dfd5f3dfffeb29343dd4c7"}],"title":"bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52938","datePublished":"2026-06-24T07:14:27.952Z","dateReserved":"2026-06-09T07:44:35.370Z","dateUpdated":"2026-06-24T07:14:27.952Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:24","lastModifiedDate":"2026-06-24 08:16:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52938","Ordinal":"1","Title":"bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and di","CVE":"CVE-2026-52938","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52938","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_sk_storage_clone and diag paths\n\nbpf_selem_unlink_nofail() sets SDATA(selem)->smap to NULL before\nremoving the selem from the storage hlist. A concurrent RCU reader in\nbpf_sk_storage_clone() can observe the selem still on the list with\nsmap already NULL, causing a NULL pointer dereference.\n\n general protection fault, probably for non-canonical address 0xdffffc000000000a:\n KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]\n RIP: 0010:bpf_sk_storage_clone+0x1cd/0xaa0 net/core/bpf_sk_storage.c:174\n Call Trace:\n  <IRQ>\n  sk_clone+0xfed/0x1980 net/core/sock.c:2591\n  inet_csk_clone_lock+0x30/0x760 net/ipv4/inet_connection_sock.c:1222\n  tcp_create_openreq_child+0x35/0x2680 net/ipv4/tcp_minisocks.c:571\n  tcp_v4_syn_recv_sock+0x123/0xf90 net/ipv4/tcp_ipv4.c:1729\n  tcp_check_req+0x8e1/0x2580 include/net/tcp.h:855\n  tcp_v4_rcv+0x1845/0x3b80 net/ipv4/tcp_ipv4.c:2347\n\nAdd a NULL check for smap in bpf_sk_storage_clone().\n\nbpf_sk_storage_diag_put_all() has the same issue. Add a NULL check\nand pass the validated smap directly to diag_get(), which is refactored\nto take smap as a parameter instead of reading it internally.\n\nbpf_sk_storage_diag_put() uses diag->maps[i] which is always valid\nunder its refcount, so diag->maps[i] is passed directly to diag_get().","Type":"Description","Title":"bpf: Fix NULL pointer dereference in bpf_sk_storage_clone and di"}]}}}