Medium [CVE-2026-63876] Convert to use a platform device
This medium-severity Red Hat Linux advisory covers CVE-2026-63876.
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Summary
In the Linux kernel, the following vulnerability has been resolved: serial: zs: Convert to use a platform device Prevent a crash from happening as the first serial port is initialised: Console: switching to mono frame buffer device 160x64 fb0: PMAG-AA frame buffer device at tc0 DECstation Z85C30 serial driver version 0.10 CPU 0 Unable to handle kernel paging request at virtual address 0000002c, epc == 803ab00c, ra == 803aafe0 Oops[#1]: CPU: 0 PID: 1 Comm: swapper Not tainted 6.4.0-rc3-00031-g84a9582fd203-dirty #57 $ 0: 00000000 10012c00 803aaeb0 00000000 $ 4: 80e12f60 80e12f50 80e12f58 81000030 $ 8: 00000000 805ff37c 00000000 33433538 $12: 65732030 00000006 80c2915d 6c616972 $16: 80e12f00 807b7630 00000000 00000000 $20: 00000004 00000348 000001a0 807623b8 $24: 00000018 00000000 $28: 80c24000 80c25d60 8078b148 803aafe0 Hi: 00000000 Lo: 00000000 epc: 803ab00c serial_base_ctrl_add+0x78/0xf4 ra: 803aafe0 serial_base_ctrl_add+0x4c/0xf4 Status: 10012c03KERNEL EXL IE Cause: 00000008 (ExcCode 02) BadVA: 0000002c PrId: 00000440 (R4400SC) Modules linked in: Process swapper (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=00000000) Stack: 80760000 00000cc0 00400044 00400040 803aa02c 80d61ab8 00000000 807b7630 80760000 807623b8 807b7628 803aa644 80386998 00000000 80e17780 80220f68 80e17780 80d61ab8 80c17d80 80e17780 80e17780 8063c798 80e17780 80383fa0 00000010 80e17780 00000000 80386998…
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
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