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CVE-2026-98709

UnknownEPSS 0.17%

Last modified

CVE-2026-98709 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. 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: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. If another link finalizes first, the function can free the WILL_BE_REPLACED chanctx while the unmatched link and driver still use it, leading to a use-after-free in later beacon generation. Require an in-place reservation to point at the current replacement context, and require the reserved and assigned contexts to be the matching replacement pair, before counting or moving the link.

Metrics

EPSS Probability
0.17%

6.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 4c4671a706d2d85442a30850abfada5377ffbbc8; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 183cc72ae9467717afba8b8d194a558a6666cb53; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < b3d9f582f98e06070d5233b177b2899b693a01ec; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < d31f655e44631891788ca67018ec5e1ed1c7de86; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 03525b632908b049f4d04cc8a71cdff2329589cf; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 5cc54a000960bc88f8c58940164dca0e601ab39c; >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 437f3727b4fd715266c296435c116288f82666fd
LinuxLinux3.17

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98709?
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. If another link finalizes first, the function can free the WILL_BE_REPLACED chanctx while the unmatched link and driver still use it, leading to a use-after-free in later beacon generation. Require an in-place reservation to point at the current replacement context, and require the reserved and assigned contexts to be the matching replacement pair, before counting or moving the link.
How severe is CVE-2026-98709?
Severity scoring for CVE-2026-98709 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98709?
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