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CVE-2022-49985 is an out-of-bounds read vulnerability in the Linux kernel eBPF subsystem's array range checking for poke descriptors. The affected logic used tnum_range(0, map->max_entries - 1) and tnum_in() to validate an array index. Because tnum_range() can represent a superset of the intended concrete range, the validation could accept an index outside the map's valid entries. A BPF runtime fuzzer triggered a KASAN slab-out-of-bounds read in bpf_int_jit_compile. The correction uses the concrete reg->var_off.value for the upper-index check when the register is a known constant scalar.
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No public exploit code observed for this vulnerability.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Referenced by the TuxCare CentOS 8.5 security advisory; no vulnerability details are provided.
A Linux kernel eBPF flaw involving use of tnum_range during array range checking for poke descriptors. Red Hat addressed it in a Moderate-severity kernel update.
A Linux kernel BPF array-range checking flaw involving use of tnum_range for poke descriptors. Red Hat addressed it in its kernel-rt security update.
Linux kernel BPF array range-checking flaw.
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.