CVE-2025-22033

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

arm64: Don't call NULL in do_compat_alignment_fixup()

do_alignment_t32_to_handler() only fixes up alignment faults for

specific instructions; it returns NULL otherwise (e.g. LDREX). When

that's the case, signal to the caller that it needs to proceed with the

regular alignment fault handling (i.e. SIGBUS). Without this patch, the

kernel panics:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000

Mem abort info:

ESR = 0x0000000086000006

EC = 0x21: IABT (current EL), IL = 32 bits

SET = 0, FnV = 0

EA = 0, S1PTW = 0

FSC = 0x06: level 2 translation fault

user pgtable: 4k pages, 48-bit VAs, pgdp=00000800164aa000

[0000000000000000] pgd=0800081fdbd22003, p4d=0800081fdbd22003, pud=08000815d51c6003, pmd=0000000000000000

Internal error: Oops: 0000000086000006 [#1] SMP

Modules linked in: cfg80211 rfkill xt_nat xt_tcpudp xt_conntrack nft_chain_nat xt_MASQUERADE nf_n

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References