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CVE-2024-50099 affects the ARM64 Linux kernel probe decoder's handling of uprobes placed on LDR (literal) and LDRSW (literal) instructions. The uprobe paths reused simulate_ldr_literal() and simulate_ldrsw_literal(), which were designed for kprobes and perform plain C accesses while executing in kernel context. These accesses lack exception-table entries required to safely handle faults on user-memory access. A fault is consequently treated as an unintended kernel access to user memory and triggers a BUG(). Hardware or software Privileged Access Never also causes these simulated user-memory accesses to fault. The simulation was additionally privileged and theoretically could address a limited kernel virtual-address range through address wrapping, although contemporary kernels reserve the reachable region. The correction rejects uprobes on these instruction classes through arm_probe_decode_insn(), while preserving the simulation functions for kprobes.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A flaw in broken ARM64 LDR-literal uprobe support in the Linux kernel.
Linux kernel ARM64 probes vulnerability caused by broken LDR literal uprobe support.
A Linux kernel ARM64 probes vulnerability involving broken LDR literal uprobe support.
A Linux kernel ARM64 probes issue involving broken LDR literal uprobe support, addressed by removing that support in the updated RHEL 8 go-toolset container image.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.