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Vulnerability record · CVE-2026-64442 · published 25 July 2026

CVE-2026-64442: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl() Two IE parsing loops are missing the header bounds checks before they dereference pIE->length: - issue_assocreq() walks pmlmeinfo->network.ies to build the association request. If the stored IE data ends with only an element_id byte and no length byte, pIE->length is read one byte past the end of the buffer. - join_cmd_hdl() walks pnetwork->ies during station join and has the same problem under the same conditions. Both buffers are filled from AP beacon and probe-response frames, so a malicious AP that sends a truncated final IE can trigger the issue. Apply the two-guard pattern established in update_beacon_info(): 1. Break if fewer than sizeof(*pIE) bytes remain. 2. Break if the IE's declared data extends past the buffer end.

8.1 CVSS 3.1 High EPSS 0.42% · top 66.3% CWE-125 · Out-of-bounds read
8.1CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
3 Sep 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl() Two IE parsing loops are missing the header bounds checks before they dereference pIE->length: - issue_assocreq() walks pmlmeinfo->network.ies to build the association request. If the stored IE data ends with only an element_id byte and no length byte, pIE->length is read one byte past the end of the buffer. - join_cmd_hdl() walks pnetwork->ies during station join and has the same problem under the same conditions. Both buffers are filled from AP beacon and probe-response frames, so a malicious AP that sends a truncated final IE can trigger the issue. Apply the two-guard pattern established in update_beacon_info(): 1. Break if fewer than sizeof(*pIE) bytes remain. 2. Break if the IE's declared data extends past the buffer end.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5 Patch
https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786 Patch
https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f Patch
https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444 Patch
https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e Patch
https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4 Patch
https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58 Patch
https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64442), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.