CVE-2026-53354 arm64: errata: Mitigate TLBI errata on various Arm CPUs
Attackers can exploit a race condition in Arm CPU TLB invalidation to read or modify stale memory data, requiring kernel patches.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53354?
CVE-2026-53354 is a high-severity vulnerability in Linux kernel, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
arm64: errata: Mitigate TLBI errata on various Arm CPUs
A number of CPUs developed by Arm suffer from errata whereby a broadcast TLBI;DSB sequence may complete before the global observation of writes which are translated by an affected TLB entry.
These errata ONLY affect the completion of memory accesses which have been translated by an invalidated TLB entry, and these errata DO NOT affect the actual invalidation of TLB entries. TLB entries are removed correctly.
This issue has been assigned CVE ID CVE-2025-10263.
To mitigate this issue, Arm recommends that software follows any affected TLBI;DSB sequence with an additional TLBI;DSB, which will ensure that all memory write effects affected by the first TLBI have been globally observed. The additional TLBI can use any operation that is broadcast to affected CPUs, and the additional DSB can use any option that is sufficient to complete the additional TLBI.
The ARM64_WORKAROUND_REPEAT_TLBI workaround is sufficient to mitigate the issue. Enable this workaround for affected CPUs, and update the silicon errata documentation accordingly.
Note that due to the manner in which Arm develops IP and tracks errata, some CPUs share a common erratum number.
Weakness: CWE-362
Which versions are affected by CVE-2026-53354?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53354?
Apply the vendor's patch.
Is CVE-2026-53354 being exploited?
There is no known exploitation of CVE-2026-53354 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-91613, BELL-CVE-2026-53354, DEBIAN-CVE-2026-53354, GHSA-j98r-r99h-p736, ROOT-OS-DEBIAN-11-CVE-2026-53354, ROOT-OS-DEBIAN-12-CVE-2026-53354 and 3 more.