CVE-2026-64512
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ACPI: CPPC: Suppress UBSAN warning caused by field misuse
In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Suppress UBSAN warning caused by field misuse The definition of reg->access_width changes depending on the reg->space_id type. Type ACPI_ADR_SPACE_PLATFORM_COMM uses access_width to indicate the PCC region, which can result in a UBSAN if the value is greater than 4. For example: UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1090:9 shift exponent 32 is too large for 32-bit type 'int' CPU: 61 UID: 0 PID: 1220 Comm: (udev-worker) Not tainted 7.0.10-201.fc44.aarch64 #1 PREEMPT(lazy) Hardware name: To be filled by O.E.M. Call trace: ...(trimming) ubsan_epilogue+0x10/0x48 __ubsan_handle_shift_out_of_bounds+0xdc/0x1e0 cpc_write+0x4d0/0x670 cppc_set_perf+0x18c/0x490 cppc_cpufreq_cpu_init+0x1c8/0x380 [cppc_cpufreq] ... (trimming) Lets fix this by validating the region type, as well as whether access_width has a value. Then since we are returning bit_width directly for ACPI_ADR_SPACE_PLATFORM_COMM, drop the code correcting the size.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4949affd5288b867cdf115f5b08d6166b2027f87 | affected | git | b54c4632946ae42f2b39ed38abd909bbf78cbcc2 | Unavailable | None listed |
| 01fc53be672acae37e611c80cc0b4f3939584de3 | affected | git | e904596ba6dd108534ffa15e3e46b2fe245145e2 | Unavailable | None listed |
| 1b890ae474d19800a6be1696df7fb4d9a41676e4 | affected | git | 2fb80e962029000959f651665baa4838cc92eb99 | Unavailable | None listed |
| 2f4a4d63a193be6fd530d180bb13c3592052904c | affected | git | 37f28bf8f14672dfa395994e41fd778a63f0bf5c | Unavailable | None listed |
| 2f4a4d63a193be6fd530d180bb13c3592052904c | affected | git | f29dc6132d4968e39d8fa575d1a12e2c718ce57b | Unavailable | None listed |
| 2f4a4d63a193be6fd530d180bb13c3592052904c | affected | git | dc066bd13c860bb27d6ace511210e18b8064c1d9 | Unavailable | None listed |
| 2f4a4d63a193be6fd530d180bb13c3592052904c | affected | git | 1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1 | Unavailable | None listed |
| 6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1 | affected | git | Unavailable | Unavailable | None listed |
| 5.15.154 | affected | semver | 5.15.155 | Unavailable | None listed |
| 6.1.90 | affected | semver | 6.1.178 | Unavailable | None listed |
| 6.6.30 | affected | semver | 6.6.145 | Unavailable | None listed |
| 6.8.9 | affected | semver | 6.9 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.9 | Unavailable | None listed |
| 5.15.155 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.96 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.39 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.4 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |