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CVE-2026-93803

UnknownEPSS 0.17%

Last modified

CVE-2026-93803 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: fix key index receive bound checks libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in both the software-decrypt key selection path and the hardware-decrypted IV/ICV strip path. In both places the existing guard only checks skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the byte at hdrlen + 3. Require hdrlen + 4 bytes before reading that item in both paths. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: fix key index receive bound checks libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in both the software-decrypt key selection path and the hardware-decrypted IV/ICV strip path. In both places the existing guard only checks skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the byte at hdrlen + 3. Require hdrlen + 4 bytes before reading that item in both paths. This is a local source-boundary check only; it does not change the key index semantics.

Metrics

EPSS Probability
0.17%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < bb18262c19feb690ddde58c70e3ad04bc6fe566e; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < 09d4a1bc3a08bb0e19bdf250b9f575cfef0bae82; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < 2836a870f612a8a6d9e390d00fa2cf6c90aa5808; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < 0b61c465ea62063593bc9ac186871b69e58ae991; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < 062840bdc9ee06169b3c371bf66711f1d7ec0bf4; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < c54b643e9a0936d038921c547736574fd7382cea; >= b453872c35cfcbdbf5a794737817f7d4e7b1b579, < 74ed3669f26803b1761c1f55403062bea44c3466
LinuxLinux2.6.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-93803?
In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: fix key index receive bound checks libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in both the software-decrypt key selection path and the hardware-decrypted IV/ICV strip path. In both places the existing guard only checks skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the byte at hdrlen + 3. Require hdrlen + 4 bytes before reading that item in both paths. This is a local source-boundary check only; it does not change the key index semantics.
How severe is CVE-2026-93803?
Severity scoring for CVE-2026-93803 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-93803?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST