CVE-2025-68256

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.

Affected Software

Weaknesses

References

• 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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