via_wdt: fix critical boot hang due to unnamed resource allocation

Summary

In the Linux kernel, the following vulnerability has been resolved: via_wdt: fix critical boot hang due to unnamed resource allocation The VIA watchdog driver uses allocate_resource() to reserve a MMIO region for the watchdog control register. However, the allocated resource was not given a name, which causes the kernel resource tree to contain an entry marked as "<BAD>" under /proc/iomem on x86 platforms. During boot, this unnamed resource can lead to a critical hang because subsequent resource lookups and conflict checks fail to handle the invalid entry properly.

Timeline

1. Jan 14, 2026, 3:06 PM UTCCVE published
2. Jun 10, 2026, 8:41 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 19, 2026, 6:15 PM UTCRecord last updated

Affected versions

• Linux Linux

  From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in 1d56025a3af50db0f3da2792f41eb9943eee5324; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in c7b986adc9e9336066350542ac5a2005d305ae78; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in 47c910965c936724070d2a8094a4c3ed8f452856; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in d2c7c90aca7b37f60f16b2bedcfeb16204f2f35d; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in f7b6370d0fbee06a867037d675797a606cb62e57; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in c6a2dd4f2e4e6cbdfe7a1618160281af897b75db; From dc3c56b703dad4aec8a9b3dd86f03a90d0c26a2d · fixed in 7aa31ee9ec92915926e74731378c009c9cc04928

• Linux Linux

  3.3

• KernelLinux

  From 3.3.0 · fixed in 5.10.248; From 5.11.0 · fixed in 5.15.198; From 5.16.0 · fixed in 6.1.160; From 6.2.0 · fixed in 6.6.120; From 6.7.0 · fixed in 6.12.64; From 6.13.0 · fixed in 6.18.3

References 7