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CVE-2025-40078— bpf: Explicitly check accesses to bpf_sock_addr

EPSS 0.06% · P18
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I. Basic Information for CVE-2025-40078

Vulnerability Information
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Vulnerability Title
bpf: Explicitly check accesses to bpf_sock_addr
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.
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，该漏洞源于未正确验证bpf_sock_addr结构体访问，可能导致越界访问。
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 1cedee13d25ab118d325f95588c1a084e9317229 ~ de44cdc50d2dce8718cb57deddf9cf1be9a7759f -
LinuxLinux 4.18 -

II. Public POCs for CVE-2025-40078

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III. Intelligence Information for CVE-2025-40078

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Same Patch Batch · Linux · 2025-10-28 · 58 CVEs total

CVE-2025-40063crypto: comp - Use same definition of context alloc and free ops
CVE-2025-40076PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()
CVE-2025-40079riscv, bpf: Sign extend struct ops return values properly
CVE-2025-40077f2fs: fix to avoid overflow while left shift operation
CVE-2025-40075tcp_metrics: use dst_dev_net_rcu()
CVE-2025-40081perf: arm_spe: Prevent overflow in PERF_IDX2OFF()
CVE-2025-40067fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist
CVE-2025-40066wifi: mt76: mt7996: Check phy before init msta_link in mt7996_mac_sta_add_links()
CVE-2025-40065RISC-V: KVM: Write hgatp register with valid mode bits
CVE-2025-40064smc: Fix use-after-free in __pnet_find_base_ndev().
CVE-2025-40068fs: ntfs3: Fix integer overflow in run_unpack()
CVE-2025-40062crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs
CVE-2025-40061RDMA/rxe: Fix race in do_task() when draining
CVE-2025-40060coresight: trbe: Return NULL pointer for allocation failures
CVE-2025-40058iommu/vt-d: Disallow dirty tracking if incoherent page walk
CVE-2025-40059coresight: Fix incorrect handling for return value of devm_kzalloc
CVE-2025-40057ptp: Add a upper bound on max_vclocks
CVE-2025-40056vhost: vringh: Fix copy_to_iter return value check
CVE-2025-40055ocfs2: fix double free in user_cluster_connect()
CVE-2025-40054f2fs: fix UAF issue in f2fs_merge_page_bio()

Showing top 20 of 58 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40078

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