Linux vulnerability

What happened

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.

Affected versions

Linux: 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before b767a5d7c6cb595f9feb00b5af96191a59efca26 (git); 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before 6181239115e19cda4b483a2604193a9379cbd28f (git); 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before c727b3d50ecb0f4992a964360771040a84026914 (git); 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before b96cb1235fcaa687291b1e1d910f0930d1939919 (git); 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before 1c53d16b174dd9e02243fc0e85089e2aa6a0d21a (git); 4976b718c3551faba2c0616ef55ebeb74db1c5ca through before 72a85e9464a5332fb2cd7efd26d9295275ceda2d (git); 5.10 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.