Medium [CVE-2026-68444] Fix NULL dereference in ffa_partition_info_get
This medium-severity Red Hat Linux advisory covers CVE-2026-68444 affecting Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get() ffa_partition_info_get() passes uuid_str directly to uuid_parse() without a NULL check.
When a caller passes NULL, uuid_parse() -> __uuid_parse() -> uuid_is_valid() dereferences the pointer, causing a kernel panic: | Unable to handle kernel NULL pointer dereference at virtual address | 0000000000000040 | pc: uuid_parse+0x40/0xac | lr: ffa_partition_info_get+0x1c/0x94 [arm_ffa] Add a NULL guard before uuid_parse() so a NULL argument returns -ENODEV instead of crashing.
Callers are expected to always supply a valid partition UUID, so NULL is not a supported input. A local attacker or malicious process could exploit this vulnerability by providing a NULL argument to the `ffa_partition_info_get()` function.
This missing NULL check leads to a NULL pointer dereference, causing a kernel panic and resulting in a Denial of Service (DoS) for the affected system. This issue affects ARM systems using FF-A (Firmware Framework for Arm). ffa_partition_info_get() passes a NULL uuid_str to uuid_parse() without validation, causing kernel panic.
Callers must pass valid UUID strings; systems without FF-A are not affected. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-476.
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 2 hours 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 2 hours ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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