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Review reviewHigh

CVE-2026-53036

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix off-by-one in check_imm signed range check check_imm(bits, imm) is used in the arm64 BPF JIT to verify that a branch displacement (in arm64 instruction units) fits into the signed N-bit immediate field of a B, B.cond or CBZ/CBNZ encoding before it is handed to the encoder. The macro currently tests for (imm > 0 && imm >> bits) || (imm < 0 && ~imm >> bits) which admits values in [-2^N, 2^N) — effectively a signed (N+1)-bit range. A signed N-bit field only holds [-2^(N-1), 2^(N-1)), so the check admits one ext...

CVSS
7.8
EPSS
0.14%
3.68% percentile
CISA KEV
Not listed
Published
2026.06.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.14%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix off-by-one in check_imm signed range check check_imm(bits, imm) is used in the arm64 BPF JIT to verify that a branch displacement (in arm64 instruction units) fits into the signed N-bit immediate field of a B, B.cond or CBZ/CBNZ encoding before it is handed to the encoder. The macro currently tests for (imm > 0 && imm >> bits) || (imm < 0 && ~imm >> bits) which admits values in [-2^N, 2^N) — effectively a signed (N+1)-bit range. A signed N-bit field only holds [-2^(N-1), 2^(N-1)), so the check admits one ext...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= e54bcde3d69d40023ae77727213d14f920eb264a < a5dfeb3b61065039488342d43ae06d4729d955d4, >= e54bcde3d69d40023ae77727213d14f920eb264a < 7fd3b41260c6120e7b60164afea5d961af6224f9, >= e54bcde3d69d40023ae77727213d14f920eb264a < 6927f0d6794aa73318bbfa929f1ff6065b0620df, >= e54bcde3d69d40023ae77727213d14f920eb264a < 1a113b5497297871699cd498b1b83542e0db7f15, >= e54bcde3d69d40023ae77727213d14f920eb264a < fb74defa1cca1a73177c0c761e641332e4f979a3, >= e54bcde3d69d40023ae77727213d14f920eb264a < 1dd8be4ec722ce54e4cace59f3a4ba658111b3ec, >= 3.18, >= 3.18 < 6.1.175, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10
Fixed versions
6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-193