{"id":"CVE-2026-43197","revision":null,"records":[{"revision":"de4f407ba96f4aed820a27c93f9cf2eb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43197","aliases":[],"title":"netconsole: avoid OOB reads, msg is not nul-terminated","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetconsole: avoid OOB reads, msg is not nul-terminated\n\nmsg passed to netconsole from the console subsystem is not guaranteed\nto be nul-terminated. Before recent\ncommit 7eab73b18630 (\"netconsole: convert to NBCON console infrastructure\")\nthe message would be placed in printk_shared_pbufs, a static global\nbuffer, so KASAN had harder time catching OOB accesses. Now we see:\n\n printk: console [netcon_ext0] enabled\n BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240\n Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594\n\n CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9\n Call Trace:\n kasan_report+0xe4/0x120\n string+0x1f7/0x240\n vsnprintf+0x655/0xba0\n scnprintf+0xba/0x120\n netconsole_write+0x3fe/0xa10\n nbcon_emit_next_record+0x46e/0x860\n nbcon_kthread_func+0x623/0x750\n\n Allocated by task 1:\n nbcon_alloc+0x1ea/0x450\n register_console+0x26b/0xe10\n init_netconsole+0xbb0/0xda0\n\n The buggy address belongs to the object at ffff88813b6d4000\n which belongs to the cache kmalloc-4k of size 4096\n The buggy address is located 0 bytes to the right of\n allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)","state":0,"publishedAt":"2026-05-06T11:28:04.829+00:00","modifiedAt":"2026-10-21T12:40:16.564+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/netconsole.c\"\n ],\n \"versions\": [\n {\n \"version\": \"c62c0a17f9b7398022f9eebe547878033264f81f\",\n \"lessThan\": \"68fe91df6ea822dae772fceaad0686e4f5839aec\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c62c0a17f9b7398022f9eebe547878033264f81f\",\n \"lessThan\": \"8fe132c4873f9eb1b86ddbf31216e9d961a0b8b9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c62c0a17f9b7398022f9eebe547878033264f81f\",\n \"lessThan\": \"3126a2f98beaec5a554a1fb31c46db1e8542665e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c62c0a17f9b7398022f9eebe547878033264f81f\",\n \"lessThan\": \"74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c62c0a17f9b7398022f9eebe547878033264f81f\",\n \"lessThan\": \"82aec772fca2223bc5774bd9af486fd95766e578\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/netconsole.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.6\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.6\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.160\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.103\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.16\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.6\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/68fe91df6ea822dae772fceaad0686e4f5839aec","https://git.kernel.org/stable/c/8fe132c4873f9eb1b86ddbf31216e9d961a0b8b9","https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e","https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58","https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43197","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43197","identifiers":["CVE-2026-43197"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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