ACPICA: Refuse to evaluate a method if arguments are missing

Summary

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Refuse to evaluate a method if arguments are missing As reported in [1], a platform firmware update that increased the number of method parameters and forgot to update a least one of its callers, caused ACPICA to crash due to use-after-free. Since this a result of a clear AML issue that arguably cannot be fixed up by the interpreter (it cannot produce missing data out of thin air), address it by making ACPICA refuse to evaluate a method if the caller attempts to pass fewer arguments than expected to it.

Timeline

1. Jul 25, 2025, 12:53 PM UTCCVE published
2. Oct 15, 2026, 9:49 PM UTCCISA SSVC assessment

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

3. Oct 15, 2026, 9:52 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in b49d224d1830c46e20adce2a239c454cdab426f1; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 2219e49857ffd6aea1b1ca5214d3270f84623a16; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in ab1e8491c19eb2ea0fda81ef28e841c7cb6399f5; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 4305d936abde795c2ef6ba916de8f00a50f64d2d; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in d547779e72cea9865b732cd45393c4cd02b3598e; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 18ff4ed6a33a7e3f2097710eacc96bea7696e803; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in c9e4da550ae196132b990bd77ed3d8f2d9747f87; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 6fcab2791543924d438e7fa49276d0998b0a069f

• Linux Linux

  2.6.12

• KernelLinux

  From 2.6.12 · fixed in 5.4.296; From 5.5.0 · fixed in 5.10.240; From 5.11.0 · fixed in 5.15.187; From 5.16.0 · fixed in 6.1.144; From 6.2.0 · fixed in 6.6.97; From 6.7.0 · fixed in 6.12.37; From 6.13.0 · fixed in 6.15.6

References 8