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CVE-2026-63930— iio: buffer: hw-consumer: fix use-after-free in error path

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在iio_hw_consumer_alloc()的err_put_buffers清理路径中使用list_for_each_entry()遍历缓冲区时，调用iio_buffer_put()可能导致当前缓冲区被释放，从而在后续迭代中访问已释放缓冲区。

CVSS 7.8 · High EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 48b66f8f936f369bb1a43c12aedbfeb2975baf4c< b71893c57730809c222766e5718bb33610f11963 affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< 2ff615fc455acda5425c4900160cbe11cfea4449 affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< d2759d49860b9a39b5cde2fb88e4b822ddf5f58f affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< 29783e6b6ec0b7152a15e53a063f17537e81177d affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< e965627f0d442bfcae3f496c90cb653fb0917a61 affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< a3763ae33476328cf8d661742deb9daec78eac96 affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< 9319c94f63ed10723afd738d79f5617daba87cc8 affected
48b66f8f936f369bb1a43c12aedbfeb2975baf4c< 6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4 affected
… +10 more rows
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I. Basic Information for CVE-2026-63930

Vulnerability Information
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Vulnerability Title
iio: buffer: hw-consumer: fix use-after-free in error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: hw-consumer: fix use-after-free in error path In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code was using list_for_each_entry() to iterate through buffers while calling iio_buffer_put() which can free the current buffer if refcount drops to 0. The list_for_each_entry() loop macro then evaluates buf->head.next to continue iteration, accessing the freed buffer. Fix this by using list_for_each_entry_safe().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于在iio_hw_consumer_alloc()的err_put_buffers清理路径中使用list_for_each_entry()遍历缓冲区时，调用iio_buffer_put()可能导致当前缓冲区被释放，从而在后续迭代中访问已释放缓冲区。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 48b66f8f936f369bb1a43c12aedbfeb2975baf4c ~ b71893c57730809c222766e5718bb33610f11963 -
Linux Linux 4.16 -

II. Public POCs for CVE-2026-63930

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III. Intelligence Information for CVE-2026-63930

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Patches & Fixes for CVE-2026-63930 (7)

Same Patch Batch · Linux · 2026-07-19 · 429 CVEs total

CVE-2026-63795 10.0 CRITICAL 9p: avoid putting oldfid in p9_client_walk() error path
CVE-2026-64089 9.8 CRITICAL batman-adv: tt: fix negative last_changeset_len
CVE-2026-53398 9.8 CRITICAL NFSD: Fix SECINFO_NO_NAME decode error cleanup
CVE-2026-64142 9.8 CRITICAL ksmbd: close durable scavenger races against m_fp_list lookups
CVE-2026-64037 9.8 CRITICAL wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled
CVE-2026-63888 9.8 CRITICAL scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()
CVE-2026-63887 9.8 CRITICAL scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf
CVE-2026-64035 9.8 CRITICAL igc: set tx buffer type for SMD frames
CVE-2026-63800 9.8 CRITICAL pNFS: Fix use-after-free in pnfs_update_layout()
CVE-2026-63886 9.8 CRITICAL scsi: target: iscsi: Validate CHAP_R length before base64 decode
CVE-2026-64033 9.8 CRITICAL RDMA/rtrs: Fix use-after-free in path file creation cleanup
CVE-2026-64122 9.8 CRITICAL net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover
CVE-2026-64150 9.8 CRITICAL netfilter: nft_inner: release local_lock before re-enabling softirqs
CVE-2026-63808 9.8 CRITICAL exfat: fix potential use-after-free in exfat_find_dir_entry()
CVE-2026-64113 9.8 CRITICAL ixgbevf: fix use-after-free in VEPA multicast source pruning
CVE-2026-64025 9.8 CRITICAL bpf, skmsg: fix verdict sk_data_ready racing with ktls rx
CVE-2026-64102 9.8 CRITICAL RDMA/siw: Reject MPA FPDU length underflow before signed receive math
CVE-2026-63993 9.8 CRITICAL vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
CVE-2026-64007 9.8 CRITICAL netfilter: synproxy: refresh tcphdr after skb_ensure_writable
CVE-2026-63984 9.8 CRITICAL ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()

Showing top 20 of 429 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-63930

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