efi: ssdt: Don't free memory if ACPI table was loaded successfully
Published Oct 1, 2025
7.8
HIGHCVSS 3.1
EPSS 0.15%
Description
Amadeusz reports KASAN use-after-free errors introduced by commit 3881ee0b1edc ("efi: avoid efivars layer when loading SSDTs from variables"). The problem appears to be that the memory that holds the new ACPI table is now freed unconditionally, instead of only when the ACPI core reported a failure to load the table.
So let's fix this, by omitting the kfree() on success.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.0StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.0
- Version 6.0.4StatusunaffectedConstraints<=6.0.*
- Version 6.1StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
- ≥ 6.0 · < 6.0.4
- 6.1
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (8)
- https://access.redhat.com/security/cve/CVE-2022-50433 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2400757 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-32848 Advisory
- https://git.kernel.org/stable/c/11497fd69cd2282538ec6eb4cda1d16fc061233d Patch
- https://git.kernel.org/stable/c/4b017e59f01097f19b938f6dc4dc2c4720701610 Patch
- https://lore.kernel.org/linux-cve-announce/2025100158-CVE-2022-50433-440b@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2022-50433
- https://www.cve.org/CVERecord?id=CVE-2022-50433
Change history (0)
No recorded changes yet.