{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53121","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-05-02T15:51:43.555Z","datePublished":"2025-05-02T15:55:58.123Z","dateUpdated":"2026-05-11T19:38:55.282Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:38:55.282Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: tcp_make_synack() can be called from process context\n\ntcp_rtx_synack() now could be called in process context as explained in\n0a375c822497 (\"tcp: tcp_rtx_synack() can be called from process\ncontext\").\n\ntcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU\nvariables with preemption enabled. This causes the following BUG:\n\n    BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464\n    caller is tcp_make_synack+0x841/0xac0\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x10d/0x1a0\n     check_preemption_disabled+0x104/0x110\n     tcp_make_synack+0x841/0xac0\n     tcp_v6_send_synack+0x5c/0x450\n     tcp_rtx_synack+0xeb/0x1f0\n     inet_rtx_syn_ack+0x34/0x60\n     tcp_check_req+0x3af/0x9e0\n     tcp_rcv_state_process+0x59b/0x2030\n     tcp_v6_do_rcv+0x5f5/0x700\n     release_sock+0x3a/0xf0\n     tcp_sendmsg+0x33/0x40\n     ____sys_sendmsg+0x2f2/0x490\n     __sys_sendmsg+0x184/0x230\n     do_syscall_64+0x3d/0x90\n\nAvoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use\nTCP_INC_STATS() which is safe to be called from context switch."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/tcp_output.c"],"versions":[{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"d493d4fe88195a144d6a277a90062a7534ed2192","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"e23ca307745be3df7fe9762f3e2a7e311a57852e","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"442aa78ed70188b21ccd8669738448702c0a3281","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"ad07290d63ff6689f50565b02f5b6f34ec15a5ca","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"9180aa4622a720b433e842b4d3aa34d73eec577a","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c","status":"affected","versionType":"git"},{"version":"8336886f786fdacbc19b719c1f7ea91eb70706d4","lessThan":"bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09","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/ipv4/tcp_output.c"],"versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","status":"unaffected","versionType":"semver"},{"version":"4.14.311","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.279","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.238","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.176","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.104","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.21","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.8","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"3.7","versionEndExcluding":"4.14.311"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"4.19.279"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.4.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.10.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d493d4fe88195a144d6a277a90062a7534ed2192"},{"url":"https://git.kernel.org/stable/c/e23ca307745be3df7fe9762f3e2a7e311a57852e"},{"url":"https://git.kernel.org/stable/c/442aa78ed70188b21ccd8669738448702c0a3281"},{"url":"https://git.kernel.org/stable/c/77ad58bca0119e8cc3e0e9d91a3f22caa66e4dfa"},{"url":"https://git.kernel.org/stable/c/ad07290d63ff6689f50565b02f5b6f34ec15a5ca"},{"url":"https://git.kernel.org/stable/c/9180aa4622a720b433e842b4d3aa34d73eec577a"},{"url":"https://git.kernel.org/stable/c/7613cde8c0c1f02a7ec2e1d536c01b65b135fc1c"},{"url":"https://git.kernel.org/stable/c/bced3f7db95ff2e6ca29dc4d1c9751ab5e736a09"}],"title":"tcp: tcp_make_synack() can be called from process context","x_generator":{"engine":"bippy-1.2.0"}}}}