CVE-2026-46234High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
0.2% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
vsock: fix buffer size clamping order
In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint.
This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size.
Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.
linux_kernel >= 5.5, < 5.10.258linux_kernel >= 5.11, < 5.15.209linux_kernel >= 5.16, < 6.1.175linux_kernel >= 6.2, < 6.6.140linux_kernel >= 6.7, < 6.12.90linux_kernel >= 6.13, < 6.18.32linux_kernel >= 6.19, < 7.0.9Upgrade past the affected range:
linux_kernel 7.0.9Connected by shared product, vendor, weakness, or advisory.
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