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Vulnerability record · CVE-2026-31626 · published 24 April 2026

CVE-2026-31626: Linux kernel use of uninitialized resource vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() Initialize le_tmp64 to zero in rtw_BIP_verify() to prevent using uninitialized data. Smatch warns that only 6 bytes are copied to this 8-byte (u64) variable, leaving the last two bytes uninitialized: drivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify() warn: not copying enough bytes for '&le_tmp64' (8 vs 6 bytes) Initializing the variable at the start of the function fixes this warning and ensures predictable behavior.

7.1 CVSS 3.1 High EPSS 0.44% · top 64.3% CWE-908 · Use of uninitialized resource
7.1CVSS 3.1 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: initialize le_tmp64 in rtw_BIP_verify() Initialize le_tmp64 to zero in rtw_BIP_verify() to prevent using uninitialized data. Smatch warns that only 6 bytes are copied to this 8-byte (u64) variable, leaving the last two bytes uninitialized: drivers/staging/rtl8723bs/core/rtw_security.c:1308 rtw_BIP_verify() warn: not copying enough bytes for '&le_tmp64' (8 vs 6 bytes) Initializing the variable at the start of the function fixes this warning and ensures predictable behavior.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/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/51532c7c1d357145f4ac561648499f7a6847f739
https://git.kernel.org/stable/c/6792624d933146e2757b07092e93ad915cb58930
https://git.kernel.org/stable/c/8c964b82a4e97ec7f25e17b803ee196009b38a57 Patch
https://git.kernel.org/stable/c/9e911eead187240193516edf55a0e1ab3425aa5b
https://git.kernel.org/stable/c/b487a7754d874230299d5a9c2710ec4df8b2ed8a Patch
https://git.kernel.org/stable/c/c2026c6b603ebec52f55015496703fe79077accf Patch
https://git.kernel.org/stable/c/c65ee4d3be5df395e48afbcd0946dd5fce4338a9 Patch
https://git.kernel.org/stable/c/d5b8f5f8d6fc09a8af5ed139c688660f578ed732 Patch
https://git.kernel.org/stable/c/ef74ce5f0bc0e53ce702d8a794f3957884a26efc Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31626), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.