staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser The Information Element (IE) parser rtw_get_ie() trusted the length byte of each IE without validating that the IE body (len bytes after the 2-byte header) fits inside the remaining frame buffer. A malformed frame can advertise an IE length larger than the available data, causing the parser to increment its pointer beyond the buffer end. This results in out-of-bounds reads or, depending on the pattern, an infinite loop. Fix by validating that (offset + 2 + len) does not exceed the limit before accepting the IE or advancing to the next element. This prevents OOB reads and ensures the parser terminates safely on malformed frames.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.203, 6.1.160, 6.6.120, 6.12.62, 6.17.12, 6.18.1, 6.19
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68256
- 2026-10-03 Alias added: GHSA-x52f-2whg-fhgm
References
Other 7
- https://git.kernel.org/stable/c/9829c6e1b2e4180fd18315252ad6faeab6128076
- https://git.kernel.org/stable/c/b977eb31802817f4a37da95bf16bfdaa1eeb5fc2
- https://git.kernel.org/stable/c/30c558447e90935f0de61be181bbcedf75952e00
- https://git.kernel.org/stable/c/a54e2b2db1b7de2e008b4f62eec35aaefcc663c5
- https://git.kernel.org/stable/c/df191dd9f4c7249d98ada55634fa8ac19089b8cb
- https://git.kernel.org/stable/c/c0d93d69e1472ba75b78898979b90a98ba2a2501
- https://git.kernel.org/stable/c/154828bf9559b9c8421fc2f0d7f7f76b3683aaed
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Sources
- CVE-2025-68256 · CVE Program
- CVE-2025-68256 · NVD
- FIRST EPSS
- GHSA-x52f-2whg-fhgm · GitHub Advisory Database · CC BY 4.0
- CVE-2025-68256 · Red Hat security data · CC BY 4.0
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