What’s Vulnerable › Vulnerabilities

CVE-2026-98363: firmware: arm_scpi: reject DVFS OPP count above MAX_DVFS_OPPS

• 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: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scpi: reject DVFS OPP count above MAX_DVFS_OPPS scpi_dvfs_get_info() already rejected a zero opp_count, but still trusted any larger value from the SCP firmware. The shared-memory reply only holds MAX_DVFS_OPPS entries in buf.opps[]; a bigger count over-reads that array and then sizes the allocated OPP table incorrectly (garbage OPPs / OOB). The missing upper bound dates back to the original SCPI DVFS support. Reject zero and out-of-range counts in one check and return -EINVAL.

Affected products

• Linux kernel: 4.4 — 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/0130f9ad3974a5b2ad0fa03d0b300a9fb83ed901
• https://git.kernel.org/stable/c/1aadbef648e92ca642125f188f99b0a26628e3ba
• https://git.kernel.org/stable/c/32471d84a487c7fd74532bc96be56f8028cf4a3f
• https://git.kernel.org/stable/c/69ec03cd481973e4be44a7158ed6c0fa06a9a5f9
• https://git.kernel.org/stable/c/7daaa684097377b66b98a832de307688a7f3bbc7
• https://git.kernel.org/stable/c/cc563a59aded6f3b02d75dcc3c0bc5e90755d99e
• https://git.kernel.org/stable/c/e9887eeaa138c6b5697af3d2f7c71dc82407b154
• https://git.kernel.org/stable/c/f17865332cc4ceaac846bcd7c28badbaedfabeff

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