{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53002: netfilter: conntrack: remove sprintf usage","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53002","status":"final","version":"1","initial_release_date":"2026-06-24T16:29:14.391Z","current_release_date":"2026-06-28T06:37:52.650Z","revision_history":[{"date":"2026-06-24T16:29:14.391Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: remove sprintf usage\n\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\n\nIncrease buffer size in mangle_content_len() while at it.\n\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\n vsnprintf+0xea5/0x1270\n sprintf+0xb1/0xe0\n mangle_content_len+0x1ac/0x280\n nf_nat_sdp_session+0x1cc/0x240\n process_sdp+0x8f8/0xb80\n process_invite_request+0x108/0x2b0\n process_sip_msg+0x5da/0xf50\n sip_help_tcp+0x45e/0x780\n nf_confirm+0x34d/0x990\n [..]","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53002 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53002"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53002"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d"}]},"product_tree":{"branches":[{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <2f793ba78470a99f40389b7dc60a81d9f5ad3956","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <2f793ba78470a99f40389b7dc60a81d9f5ad3956","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <6bbf829b4c1b44c941c47dd0d710f1393258f3d5","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <6bbf829b4c1b44c941c47dd0d710f1393258f3d5","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <ab64e61c9323fa6de21bd20da1ddb29a0fb65d34","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <ab64e61c9323fa6de21bd20da1ddb29a0fb65d34","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <a8e0a32a23d3f34862af3b4da792ecb3a891a9a3","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <a8e0a32a23d3f34862af3b4da792ecb3a891a9a3","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <8e3be0d12615a173fe260cd42753ca7a001acbf2","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <8e3be0d12615a173fe260cd42753ca7a001acbf2","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <c08ff52e44945e6ef4ce0790f49ea761b060c45b","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <c08ff52e44945e6ef4ce0790f49ea761b060c45b","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=9fafcd7b203229c3f3893a475741afc27e276306 <6e7066bdb481a87fe88c4fa563e348c03b2d373d","product":{"name":"Linux Linux >=9fafcd7b203229c3f3893a475741afc27e276306 <6e7066bdb481a87fe88c4fa563e348c03b2d373d","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version","name":"2.6.20","product":{"name":"Linux Linux 2.6.20","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"0","product":{"name":"Linux Linux 0","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.10.258","product":{"name":"Linux Linux 5.10.258","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.15.209","product":{"name":"Linux Linux 5.15.209","product_id":"CSAFPID-12","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.1.175","product":{"name":"Linux Linux 6.1.175","product_id":"CSAFPID-13","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.6.141","product":{"name":"Linux Linux 6.6.141","product_id":"CSAFPID-14","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.12.91","product":{"name":"Linux Linux 6.12.91","product_id":"CSAFPID-15","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.18.33","product":{"name":"Linux Linux 6.18.33","product_id":"CSAFPID-16","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.0.10","product":{"name":"Linux Linux 7.0.10","product_id":"CSAFPID-17","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.1","product":{"name":"Linux Linux 7.1","product_id":"CSAFPID-18","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.20:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53002","title":"netfilter: conntrack: remove sprintf usage","notes":[{"category":"description","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: remove sprintf usage\n\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\n\nIncrease buffer size in mangle_content_len() while at it.\n\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\n vsnprintf+0xea5/0x1270\n sprintf+0xb1/0xe0\n mangle_content_len+0x1ac/0x280\n nf_nat_sdp_session+0x1cc/0x240\n process_sdp+0x8f8/0xb80\n process_invite_request+0x108/0x2b0\n process_sip_msg+0x5da/0xf50\n sip_help_tcp+0x45e/0x780\n nf_confirm+0x34d/0x990\n [..]","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"],"fixed":["CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14","CSAFPID-15","CSAFPID-16","CSAFPID-17","CSAFPID-18"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 0, 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e, 2f793ba78470a99f40389b7dc60a81d9f5ad3956, 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 6bbf829b4c1b44c941c47dd0d710f1393258f3d5, 6e7066bdb481a87fe88c4fa563e348c03b2d373d, 7.0.10, 7.1, 8e3be0d12615a173fe260cd42753ca7a001acbf2, a8e0a32a23d3f34862af3b4da792ecb3a891a9a3, ab64e61c9323fa6de21bd20da1ddb29a0fb65d34, c08ff52e44945e6ef4ce0790f49ea761b060c45b.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}]}]}