What’s Vulnerable › Vulnerabilities

CVE-2026-89716: zram: validate deflate params

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: zram: validate deflate params We must validate user-supplied deflate winbits before we pass it to zlib_deflate_workspacesize(), which triggers BUG_ON() if winbits value is outside of valid ranges.

Affected products

• Linux kernel: 6.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/923578d0f0d0703c3db61ab35dc37075ae53b0bd
• https://git.kernel.org/stable/c/e23fac4ab2a5728386477b98a402a1042b21bffb
• https://git.kernel.org/stable/c/ec7607ac4717ff521c9c1e9d8271c26293345513

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