CVE-2026-98248arm64: percpu: Fix LSE operations on {8,16}-bit types
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 959bf2fd03b59fc107584c21425f3dc73c49f762 before d69ab4480e49bf925f4781afcc9f284affcb96b6; from 959bf2fd03b59fc107584c21425f3dc73c49f762 before 390742871a723b52de9b92a94c0d1c85a2531e3e; 959bf2fd03b59fc107584c21425f3dc73c49f762 builds before 843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003; 959bf2fd03b59fc107584c21425f3dc73c49f762 builds before 8cf2093f5372952a9ebc805c418d45df7112cd14 | CNA record |
References
- https://git.kernel.org/stable/c/d69ab4480e49bf925f4781afcc9f284affcb96b6
- https://git.kernel.org/stable/c/390742871a723b52de9b92a94c0d1c85a2531e3e
- https://git.kernel.org/stable/c/843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003
- https://git.kernel.org/stable/c/8cf2093f5372952a9ebc805c418d45df7112cd14
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.