CVE-2026-64443staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 handler functions. Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past len. Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length for consistency with the sizeof(*pIE) guards added above.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 6dd5e8c3011ebabf417257d7f07901a7c4311539; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 9193c34f75fd9e1ea8a590d7cced464c3380dc29; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before bd953d52d587d42365e399b96c52dbdb13032070; 554c0a3abf216c991c5ebddcdb2c08689ecd290b builds before 69f174a0673b6b7a29b851adb60bc450cdc0ecc4; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before b5cc2f999927f69723ca53f1f2a3aa37dbeda907; from 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ed51de4a86e173c3b0ef78e039c2e49e08b11f16 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.12 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; 7.2 | NVD |
References
- https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25patch
- https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539patch
- https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29patch
- https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070patch
- https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4patch
- https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907patch
- https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.