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CVE-2025-68256

HIGHCVSS 8.8/10EPSS 0.17%

Last modified

CVE-2025-68256 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.17%

6.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 9829c6e1b2e4180fd18315252ad6faeab6128076; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < b977eb31802817f4a37da95bf16bfdaa1eeb5fc2; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 30c558447e90935f0de61be181bbcedf75952e00; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < a54e2b2db1b7de2e008b4f62eec35aaefcc663c5; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < df191dd9f4c7249d98ada55634fa8ac19089b8cb; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < c0d93d69e1472ba75b78898979b90a98ba2a2501; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 154828bf9559b9c8421fc2f0d7f7f76b3683aaed
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-68256?
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.
How severe is CVE-2025-68256?
CVE-2025-68256 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-68256?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST