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CVE-2026-98887

UnknownEPSS 0.21%

Last modified

CVE-2026-98887 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.

Metrics

EPSS Probability
0.21%

11.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 3a96bb65b4b820d8b41fa155781ec1c29e3479d4; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 59e1f2a0242232b4a3af144ae317d3913fc09046; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 1ae85bb34fe3510659b86d6a5f8036dd498233f8; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < b5b1234bbfa25537fb9a5c0d62c328ed4547f721; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7; >= 5d44fe7c9808c56e136e59147bd932f5491520f1, < 3dc723ac78a6e4fa0fd49e27e487ed319da40a9f
LinuxLinux5.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98887?
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload. Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.
How severe is CVE-2026-98887?
Severity scoring for CVE-2026-98887 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98887?
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