Answer in brief
CVE-2024-50257 records a High severity (CVSS 7.0) vulnerability in netfilter: Fix use-after-free in get_info(). 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.
CVSS is 7.0. 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 | >=fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 <ba22ea01348384df19cc1fabc7964be6e7189749 || >=fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 <cb7c388b5967946f097afdb759b7c860305f2d96 || >=fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 <6a1f088f9807f5166f58902d26246d0b88da03a8 || >=fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 <bab3bb35c03b263c486833d50d50c081d9e9832b || >=fdacd57c79b79a03c7ca88f706ad9fb7b46831c1 <f48d258f0ac540f00fa617dac496c4c18b5dc2fa | ba22ea01348384df19cc1fabc7964be6e7189749, cb7c388b5967946f097afdb759b7c860305f2d96, 6a1f088f9807f5166f58902d26246d0b88da03a8, bab3bb35c03b263c486833d50d50c081d9e9832b, f48d258f0ac540f00fa617dac496c4c18b5dc2fa |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Nov 9, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: Fix use-after-free in get_info() ip6table_nat module unload has refcnt warning for UAF. call trace is: WARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80 Modules linked in: ip6table_nat(-) CPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:module_put+0x6f/0x80 Call Trace: <TASK> get_info+0x128/0x180 do_ip6t_get_ctl+0x6a/0x430 nf_getsockopt+0x46/0x80 ipv6_getsockopt+0xb9/0x100 rawv6_getsockopt+0x42/0x190 do_sock_getsockopt+0xaa/0x180 __sys_getsockopt+0x70/0xc0 __x64_sys_getsockopt+0x20/0x30 do_syscall_64+0xa2/0x1a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Concurrent execution of module unload and get_info() trigered the warning. The root cause is as follows: cpu0 cpu1 module_exit //mod->state = MODULE_STATE_GOING ip6table_nat_exit xt_unregister_template kfree(t) //removed from templ_list getinfo() t = xt_find_table_lock list_for_each_entry(tmpl, &xt_templates[af]...) if (strcmp(tmpl->name, name)) continue; //table not found try_module_get list_for_each_entry(t, &xt_net->tables[af]...) return t; //not get refcnt module_put(t->me) //uaf unregister_pernet_subsys //remove table from xt_net list While xt_table module was going away and has been removed from xt_templates list, we couldnt get refcnt of xt_table->me. Check module in xt_net->tables list re-traversal to fix it.
Quoted source text, attributed separately from HOL analysis.