Answer in brief
CVE-2026-43450 records a Unknown severity vulnerability in netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=12f7a505331e6b2754684b509f2ac8f0011ce644 <0605e1985a95d4334a67869aee45a47e82301abf || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <92441f6d9405a0c18d03f278b395e782f79a4a30 || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <3cc328ffc32ddb389cba7b78b6aa95d995c2876e || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <4a1f6ee69267a5f524102c028981410eeacfa3da || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <894c5780ddadd5fde0e16f66587918e6be1504c4 || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <05018cd9370f77bb18fbf6e15ff33c7a06f10b3c || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <61b3a1f8621df1a5928118313f133996f6a786db || >=12f7a505331e6b2754684b509f2ac8f0011ce644 <6dcee8496d53165b2d8a5909b3050b62ae71fe89 | 0605e1985a95d4334a67869aee45a47e82301abf, 92441f6d9405a0c18d03f278b395e782f79a4a30, 3cc328ffc32ddb389cba7b78b6aa95d995c2876e, 4a1f6ee69267a5f524102c028981410eeacfa3da, 894c5780ddadd5fde0e16f66587918e6be1504c4, 05018cd9370f77bb18fbf6e15ff33c7a06f10b3c, 61b3a1f8621df1a5928118313f133996f6a786db, 6dcee8496d53165b2d8a5909b3050b62ae71fe89 |
| Linux/Linuxgeneric | 3.6 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() nfnl_cthelper_dump_table() has a 'goto restart' that jumps to a label inside the for loop body. When the "last" helper saved in cb->args[1] is deleted between dump rounds, every entry fails the (cur != last) check, so cb->args[1] is never cleared. The for loop finishes with cb->args[0] == nf_ct_helper_hsize, and the 'goto restart' jumps back into the loop body bypassing the bounds check, causing an 8-byte out-of-bounds read on nf_ct_helper_hash[nf_ct_helper_hsize]. The 'goto restart' block was meant to re-traverse the current bucket when "last" is no longer found, but it was placed after the for loop instead of inside it. Move the block into the for loop body so that the restart only occurs while cb->args[0] is still within bounds. BUG: KASAN: slab-out-of-bounds in nfnl_cthelper_dump_table+0x9f/0x1b0 Read of size 8 at addr ffff888104ca3000 by task poc_cthelper/131 Call Trace: nfnl_cthelper_dump_table+0x9f/0x1b0 netlink_dump+0x333/0x880 netlink_recvmsg+0x3e2/0x4b0 sock_recvmsg+0xde/0xf0 __sys_recvfrom+0x150/0x200 __x64_sys_recvfrom+0x76/0x90 do_syscall_64+0xc3/0x6e0 Allocated by task 1: __kvmalloc_node_noprof+0x21b/0x700 nf_ct_alloc_hashtable+0x65/0xd0 nf_conntrack_helper_init+0x21/0x60 nf_conntrack_init_start+0x18d/0x300 nf_conntrack_standalone_init+0x12/0xc0
Quoted source text, attributed separately from HOL analysis.