{"id":"CVE-2022-48757","state":"PUBLISHED","title":"net: fix information leakage in /proc/net/ptype","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix information leakage in /proc/net/ptype\n\nIn one net namespace, after creating a packet socket without binding\nit to a device, users in other net namespaces can observe the new\n`packet_type` added by this packet socket by reading `/proc/net/ptype`\nfile. This is minor information leakage as packet socket is\nnamespace aware.\n\nAdd a net pointer in `packet_type` to keep the net namespace of\nof corresponding packet socket. In `ptype_seq_show`, this net pointer\nmust be checked when it is not NULL.","publishedAt":"2024-06-20T11:13:36.529Z","updatedAt":"2026-05-11T18:46:20.699Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"8f88c78d24f6f346919007cd459fd7e51a8c7779","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"be1ca30331c7923c6f376610c1bd6059be9b1908","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"c38023032a598ec6263e008d62c7f02def72d5c7","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"b67ad6170c0ea87391bb253f35d1f78857736e54","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"e372ecd455b6ebc7720f52bf4b5f5d44d02f2092","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"db044d97460ea792110eb8b971e82569ded536c6","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"e43669c77cb3a742b7d84ecdc7c68c4167a7709b","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"839ec7039513a4f84bfbaff953a9393471176bee","versionType":"git"},{"version":"2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50","status":"affected","lessThan":"47934e06b65637c88a762d9c98329ae6e3238888","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/netdevice.h","net/core/net-procfs.c","net/packet/af_packet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.26","versionType":"semver"},{"version":"4.4.302","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.300","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.265","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.228","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.176","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.96","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.19","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.5","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/netdevice.h","net/core/net-procfs.c","net/packet/af_packet.c"]}],"references":["https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779","https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908","https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7","https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54","https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092","https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6","https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b","https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee","https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48757.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48757","state":"PUBLISHED","datePublished":"2024-06-20T11:13:36.529Z","dateUpdated":"2026-05-11T18:46:20.699Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-06-20T11:09:39.059Z"},"containers":{"cna":{"title":"net: fix information leakage in /proc/net/ptype","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix information leakage in /proc/net/ptype\n\nIn one net namespace, after creating a packet socket without binding\nit to a device, users in other net namespaces can observe the new\n`packet_type` added by this packet socket by reading `/proc/net/ptype`\nfile. 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In `ptype_seq_show`, this net pointer\nmust be checked when it is not 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