{"id":"CVE-2026-43197","title":"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","summary":"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…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.6, < 6.18.16","linux_kernel >= 6.19, < 6.19.6","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.6"],"published":"2026-05-06","updated":"2026-08-09","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43197","references":[{"url":"https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8fe132c4873f9eb1b86ddbf31216e9d961a0b8b9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00478,"epssPercentile":0.40398,"ingestedAt":"2026-08-09T19:34:40.773Z","slug":"CVE-2026-43197","body":"## Overview\n\nIn 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)\n\n## Affected\n\n- `linux_kernel >= 6.6, < 6.18.16`\n- `linux_kernel >= 6.19, < 6.19.6`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.6`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}