CVE-2026-64443staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
- 8.1HighCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 79% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 6dd5e8c3011ebabf417257d7f07901a7c4311539
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 9193c34f75fd9e1ea8a590d7cced464c3380dc29
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < bd953d52d587d42365e399b96c52dbdb13032070
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < b5cc2f999927f69723ca53f1f2a3aa37dbeda907
- affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b – < ed51de4a86e173c3b0ef78e039c2e49e08b11f16
- affected 4.12
- unaffected < 4.12
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25 (opens in a new tab)
- https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539 (opens in a new tab)
- https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29 (opens in a new tab)
- https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070 (opens in a new tab)
- https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4 (opens in a new tab)
- https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907 (opens in a new tab)
- https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48787 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64443)Record last updated .