# CVE-2022-50475: RDMA/core: Make sure "ib_port" is valid when access sysfs node

> A null pointer dereference in the Linux kernel RDMA core allows local attackers to cause a system crash by accessing sysfs nodes.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 Oct 2025
- **Updated:** 11 May 2026
- **Also known as:** DEBIAN-CVE-2022-50475, GHSA-c58w-c6q2-hwjw, UBUNTU-CVE-2022-50475

## What is CVE-2022-50475?

CVE-2022-50475 is a medium-severity vulnerability in Linux kernel, published on 4 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: Make sure "ib_port" is valid when access sysfs node

The "ib_port" structure must be set before adding the sysfs kobject,
and reset after removing it, otherwise it may crash when accessing
the sysfs node:
  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050
  Mem abort info:
    ESR = 0x96000006
    Exception class = DABT (current EL), IL = 32 bits
    SET = 0, FnV = 0
    EA = 0, S1PTW = 0
  Data abort info:
    ISV = 0, ISS = 0x00000006
    CM = 0, WnR = 0
  user pgtable: 4k pages, 48-bit VAs, pgdp = 00000000e85f5ba5
  [0000000000000050] pgd=0000000848fd9003, pud=000000085b387003, pmd=0000000000000000
  Internal error: Oops: 96000006 [#2] PREEMPT SMP
  Modules linked in: ib_umad(O) mlx5_ib(O) nfnetlink_cttimeout(E) nfnetlink(E) act_gact(E) cls_flower(E) sch_ingress(E) openvswitch(E) nsh(E) nf_nat_ipv6(E) nf_nat_ipv4(E) nf_conncount(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) mst_pciconf(O) ipmi_devintf(E) ipmi_msghandler(E) ipmb_dev_int(OE) mlx5_core(O) mlxfw(O) mlxdevm(O) auxiliary(O) ib_uverbs(O) ib_core(O) mlx_compat(O) psample(E) sbsa_gwdt(E) uio_pdrv_genirq(E) uio(E) mlxbf_pmc(OE) mlxbf_gige(OE) mlxbf_tmfifo(OE) gpio_mlxbf2(OE) pwr_mlxbf(OE) mlx_trio(OE) i2c_mlxbf(OE) mlx_bootctl(OE) bluefield_edac(OE) knem(O) ip_tables(E) ipv6(E) crc_ccitt(E) [last unloaded: mst_pci]
  Process grep (pid: 3372, stack limit = 0x0000000022055c92)
  CPU: 5 PID: 3372 Comm: grep Tainted: G      D    OE     4.19.161-mlnx.47.gadcd9e3 #1
  Hardware name: https://www.mellanox.com BlueField SoC/BlueField SoC, BIOS BlueField:3.9.2-15-ga2403ab Sep  8 2022
  pstate: 40000005 (nZcv daif -PAN -UAO)
  pc : hw_stat_port_show+0x4c/0x80 [ib_core]
  lr : port_attr_show+0x40/0x58 [ib_core]
  sp : ffff000029f43b50
  x29: ffff000029f43b50 x28: 0000000019375000
  x27: ffff8007b821a540 x26: ffff000029f43e30
  x25: 0000000000008000 x24: ffff000000eaa958
  x23: 0000000000001000 x22: ffff8007a4ce3000
  x21: ffff8007baff8000 x20: ffff8007b9066ac0
  x19: ffff8007bae97578 x18: 0000000000000000
  x17: 0000000000000000 x16: 0000000000000000
  x15: 0000000000000000 x14: 0000000000000000
  x13: 0000000000000000 x12: 0000000000000000
  x11: 0000000000000000 x10: 0000000000000000
  x9 : 0000000000000000 x8 : ffff8007a4ce4000
  x7 : 0000000000000000 x6 : 000000000000003f
  x5 : ffff000000e6a280 x4 : ffff8007a4ce3000
  x3 : 0000000000000000 x2 : aaaaaaaaaaaaaaab
  x1 : ffff8007b9066a10 x0 : ffff8007baff8000
  Call trace:
   hw_stat_port_show+0x4c/0x80 [ib_core]
   port_attr_show+0x40/0x58 [ib_core]
   sysfs_kf_seq_show+0x8c/0x150
   kernfs_seq_show+0x44/0x50
   seq_read+0x1b4/0x45c
   kernfs_fop_read+0x148/0x1d8
   __vfs_read+0x58/0x180
   vfs_read+0x94/0x154
   ksys_read+0x68/0xd8
   __arm64_sys_read+0x28/0x34
   el0_svc_common+0x88/0x18c
   el0_svc_handler+0x78/0x94
   el0_svc+0x8/0xe8
  Code: f2955562 aa1603e4 aa1503e0 f9405683 (f9402861)

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2022-50475?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2022-50475?

Apply the vendor's patch.

## Is CVE-2022-50475 being exploited?

There is no known exploitation of CVE-2022-50475 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-50475 and fix it if it is affected.

What it is: CVE-2022-50475 is a medium-severity vulnerability in Linux kernel, published on 4 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-50475 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-50475/ (Markdown: https://insights.sbomify.com/CVE-2022-50475/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-50475
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50475
- OSV: https://osv.dev/vulnerability/CVE-2022-50475

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-50475/
Summaries are generated and may contain mistakes; the official description above is the record.