# CVE-2021-47265: linux: In the Linux kernel, the following vulnerability has been resolved:  RDMA: Verify port when creating flow rule  Valid...

CVE-2021-47265 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47265, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47265
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  RDMA: Verify port when creating flow rule  Validate port value provided by the user and with that remove no longer needed validation by the driver.  The missing check in the mlx5_ib driver could cause to the below oops.  Call trace:   _create_flow_rule+0x2d4/0xf28 [mlx5_ib]   mlx5_ib_create_flow+0x2d0/0x5b0 [mlx5_ib]   ib_uverbs_ex_create_flow+0x4cc/0x624 [ib_uverbs]   ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0xd4/0x150 [ib_uverbs]   ib_uverbs_cmd_verbs.isra.7+0xb28/0xc50 [ib_uverbs]   ib_uverbs_ioctl+0x158/0x1d0 [ib_uverbs]   do_vfs_ioctl+0xd0/0xaf0   ksys_ioctl+0x84/0xb4   __arm64_sys_ioctl+0x28/0xc4   el0_svc_common.constprop.3+0xa4/0x254   el0_svc_handler+0x84/0xa0   el0_svc+0x10/0x26c  Code: b9401260 f9615681 51000400 8b001c20 (f9403c1a)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47265](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47265.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47265](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47265.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47265](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47265.md) | May 21, 2024 |

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