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Review reviewHigh

CVE-2026-64443

Linux

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop The IE parsing loop in update_beacon_info() advances by (pIE->length + 2) each iteration but only guards on i < len. When a malicious AP sends a Beacon whose last IE has only one byte remaining in the frame (the element_id byte lands at len-1), the loop reads pIE->length from one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond len, passing a truncated IE to the...

CVSS
8.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 8.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop The IE parsing loop in update_beacon_info() advances by (pIE->length + 2) each iteration but only guards on i < len. When a malicious AP sends a Beacon whose last IE has only one byte remaining in the frame (the element_id byte lands at len-1), the loop reads pIE->length from one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond len, passing a truncated IE to the...

Affected product and versions

Product
Linux
Affected versions
>= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6dd5e8c3011ebabf417257d7f07901a7c4311539, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 9193c34f75fd9e1ea8a590d7cced464c3380dc29, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < bd953d52d587d42365e399b96c52dbdb13032070, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b5cc2f999927f69723ca53f1f2a3aa37dbeda907, >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < ed51de4a86e173c3b0ef78e039c2e49e08b11f16, >= 4.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE
Not available
CVE-2026-64443 — Linux | SECUFOCUS NOW