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CVE-2025-40169— bpf: Reject negative offsets for ALU ops

EPSS 0.03% · P8
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I. Basic Information for CVE-2025-40169

Vulnerability Information
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Vulnerability Title
bpf: Reject negative offsets for ALU ops
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject negative offsets for ALU ops When verifying BPF programs, the check_alu_op() function validates instructions with ALU operations. The 'offset' field in these instructions is a signed 16-bit integer. The existing check 'insn->off > 1' was intended to ensure the offset is either 0, or 1 for BPF_MOD/BPF_DIV. However, because 'insn->off' is signed, this check incorrectly accepts all negative values (e.g., -1). This commit tightens the validation by changing the condition to '(insn->off != 0 && insn->off != 1)'. This ensures that any value other than the explicitly permitted 0 and 1 is rejected, hardening the verifier against malformed BPF programs.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于BPF验证器未正确拒绝ALU操作中的负偏移量，可能导致恶意BPF程序执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ec0e2da95f72d4a46050a4d994e4fe471474fd80 ~ 3bce44b344040e5eef3d64d38b157c15304c0aab -
LinuxLinux 6.6 -

II. Public POCs for CVE-2025-40169

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III. Intelligence Information for CVE-2025-40169

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Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total

CVE-2025-40176tls: wait for pending async decryptions if tls_strp_msg_hold fails
CVE-2025-40172accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
CVE-2025-40171nvmet-fc: move lsop put work to nvmet_fc_ls_req_op
CVE-2025-40167ext4: detect invalid INLINE_DATA + EXTENTS flag combination
CVE-2025-40164usbnet: Fix using smp_processor_id() in preemptible code warnings
CVE-2025-40162ASoC: amd/sdw_utils: avoid NULL deref when devm_kasprintf() fails
CVE-2025-40163sched/deadline: Stop dl_server before CPU goes offline
CVE-2025-40161mailbox: zynqmp-ipi: Fix SGI cleanup on unbind
CVE-2025-40166drm/xe/guc: Check GuC running state before deregistering exec queue
CVE-2025-40175idpf: cleanup remaining SKBs in PTP flows
CVE-2025-40174x86/mm: Fix SMP ordering in switch_mm_irqs_off()
CVE-2025-40173net/ip6_tunnel: Prevent perpetual tunnel growth
CVE-2025-40177accel/qaic: Fix bootlog initialization ordering
CVE-2025-40178pid: Add a judgment for ns null in pid_nr_ns
CVE-2025-40179ext4: verify orphan file size is not too big
CVE-2025-40180mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loop
CVE-2025-40181x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP
CVE-2025-40183bpf: Fix metadata_dst leak __bpf_redirect_neigh_v{4,6}
CVE-2025-40182crypto: skcipher - Fix reqsize handling
CVE-2025-40184KVM: arm64: Fix debug checking for np-guests using huge mappings

Showing top 20 of 96 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40169

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