CVE-2026-72402 bpf: Mask pseudo pointer values in verifier logs
A local attacker can leak kernel pointer addresses via BPF verifier logs, bypassing KASLR protections.
- 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-2026-72402?
CVE-2026-72402 is a vulnerability in Linux, published on 15 Aug 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:
bpf: Mask pseudo pointer values in verifier logs
print_bpf_insn() masks ldimm64 immediates for pointer-bearing pseudo sources when pointer leaks are not allowed, but the mask only covers BPF_PSEUDO_MAP_FD and BPF_PSEUDO_MAP_VALUE.
BPF_PSEUDO_MAP_IDX, BPF_PSEUDO_MAP_IDX_VALUE, and BPF_PSEUDO_BTF_ID can also be resolved to kernel pointer values before the verifier log prints the instruction. Include them in the existing pointer classification so the log prints 0x0 instead of the rewritten address.
Which versions are affected by CVE-2026-72402?
How do I fix CVE-2026-72402?
Apply the vendor's patch.
Is CVE-2026-72402 being exploited?
There is no known exploitation of CVE-2026-72402 in the wild and no public exploit code.
Sources
Also known as AZL-96581, BELL-CVE-2026-72402, DEBIAN-CVE-2026-72402, GHSA-759v-33rj-5hjh, UBUNTU-CVE-2026-72402.