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CVE-2026-98611

Unknown

Last modified

CVE-2026-98611 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: bpf: Check params size before reading reserved fields bpf_crypto_ctx_create() is a kfunc whose second argument is declared with the __sz annotation, so the verifier only guarantees that params__sz bytes of params are valid. The function nevertheless reads params->reserved[0] and params->reserved[1] (offsets 14 and 15) before comparing params__sz against the size of struct bpf_crypto_params, so a BPF program can pass a shorter buffer and have the kernel read past the region that was validated for it. Move the size check in front of the reserved field reads..

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Check params size before reading reserved fields bpf_crypto_ctx_create() is a kfunc whose second argument is declared with the __sz annotation, so the verifier only guarantees that params__sz bytes of params are valid. The function nevertheless reads params->reserved[0] and params->reserved[1] (offsets 14 and 15) before comparing params__sz against the size of struct bpf_crypto_params, so a BPF program can pass a shorter buffer and have the kernel read past the region that was validated for it. Move the size check in front of the reserved field reads.

Affected Software

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

VendorProductVersions
LinuxLinux>= 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a; >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < cd12d3e08620257fbcaa262785d7f4b9473afc7a; >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < 86a0e945fb645ea90233fde239cd2de79f01974c; >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78, < a11212910cf09b2fe8db9afa41ef60c4f81879c5
LinuxLinux6.10

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98611?
In the Linux kernel, the following vulnerability has been resolved: bpf: Check params size before reading reserved fields bpf_crypto_ctx_create() is a kfunc whose second argument is declared with the __sz annotation, so the verifier only guarantees that params__sz bytes of params are valid. The function nevertheless reads params->reserved[0] and params->reserved[1] (offsets 14 and 15) before comparing params__sz against the size of struct bpf_crypto_params, so a BPF program can pass a shorter buffer and have the kernel read past the region that was validated for it. Move the size check in front of the reserved field reads.
How severe is CVE-2026-98611?
Severity scoring for CVE-2026-98611 is pending analysis.
How do I fix CVE-2026-98611?
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