CVE-2026-98248
In the Linux kernel, the following vulnerability has been resolved: arm64: percpu: Fix LSE operations on {8,16}-bit types The assembly for __percpu_##name##_case_##sz() and __percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro argument to form the LSE instruction. Without 'sfx', a W register argument will imply a 32-bit memory location, and consequently {8,16}-bit ops will erroneously read and write 32 bits of memory when the LSE instruction is used. Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is a register-register operation which does not access memory (and does not take a size suffix).
Affected versions
Linux kernel versions
5.0
and later are affected. Fixed in
6.12.112,
6.18.54,
7.2.8,
7.3-rc4
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-98248?
CVE-2026-98248 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.0 onward and has been patched in 6.12.112, 6.18.54, 7.2.8 and others. CVE-2026-98248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98248?
Yes. CVE-2026-98248 has been patched. Fixed versions include 6.12.112, 6.18.54, 7.2.8 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98248 actively exploited?
No. CVE-2026-98248 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.