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CVE-2026-43197— netconsole: avoid OOB reads, msg is not nul-terminated

CVSS 9.1 · Critical EPSS 0.04% · P12
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I. Basic Information for CVE-2026-43197

Vulnerability Information
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Vulnerability Title
netconsole: avoid OOB reads, msg is not nul-terminated
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netconsole: avoid OOB reads, msg is not nul-terminated msg passed to netconsole from the console subsystem is not guaranteed to be nul-terminated. Before recent commit 7eab73b18630 ("netconsole: convert to NBCON console infrastructure") the message would be placed in printk_shared_pbufs, a static global buffer, so KASAN had harder time catching OOB accesses. Now we see: printk: console [netcon_ext0] enabled BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240 Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594 CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9 Call Trace: kasan_report+0xe4/0x120 string+0x1f7/0x240 vsnprintf+0x655/0xba0 scnprintf+0xba/0x120 netconsole_write+0x3fe/0xa10 nbcon_emit_next_record+0x46e/0x860 nbcon_kthread_func+0x623/0x750 Allocated by task 1: nbcon_alloc+0x1ea/0x450 register_console+0x26b/0xe10 init_netconsole+0xbb0/0xda0 The buggy address belongs to the object at ffff88813b6d4000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 0 bytes to the right of allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netconsole中消息未以空字符结尾，可能导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux c62c0a17f9b7398022f9eebe547878033264f81f ~ 3126a2f98beaec5a554a1fb31c46db1e8542665e -
LinuxLinux 6.6 -

II. Public POCs for CVE-2026-43197

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III. Intelligence Information for CVE-2026-43197

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Same Patch Batch · Linux · 2026-05-06 · 225 CVEs total

CVE-2026-432089.8 CRITICALnet: do not pass flow_id to set_rps_cpu()
CVE-2026-431989.8 CRITICALtcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-431259.8 CRITICALdlm: validate length in dlm_search_rsb_tree
CVE-2026-431859.8 CRITICALksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-431869.8 CRITICALipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-431149.4 CRITICALnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-431179.1 CRITICALbtrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-430839.1 CRITICALnet: ioam6: fix OOB and missing lock
CVE-2026-432838.8 HIGHnet: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-431138.8 HIGHwifi: wl1251: validate packet IDs before indexing tx_frames
CVE-2026-431128.8 HIGHfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-431108.8 HIGHwifi: brcmfmac: validate bsscfg indices in IF events
CVE-2026-431728.8 HIGHwifi: iwlwifi: fix 22000 series SMEM parsing
CVE-2026-431768.8 HIGHwifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-432328.8 HIGHnet: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-432158.8 HIGHcifs: Fix locking usage for tcon fields
CVE-2026-431588.8 HIGHxfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-431878.8 HIGHxfs: delete attr leaf freemap entries when empty
CVE-2026-432398.8 HIGHsmb: client: prevent races in ->query_interfaces()
CVE-2026-432498.8 HIGH9p/xen: protect xen_9pfs_front_free against concurrent calls

Showing top 20 of 225 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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