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CVE-2026-74673— Input: evdev - fix information leak in evdev_pass_values()

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基金会开源的一个操作系统内核。 Linux kernel 5.10.265之前版本、5.15.216之前版本、6.1.183之前版本、6.6.152之前版本、6.12.104之前版本、6.18.45之前版本和7.1.9之前版本存在安全漏洞，该漏洞源于evdev_pass_values()函数中input_event结构体未完全初始化，填充字节未清除，可能导致内核栈内存信息泄露，暴露敏感信息。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.18% · P7

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6addb1d6de1968b84852f54561cc9a999909b5a9< d2e3839419ac4047835762c4d7712bda1101b57e affected
6addb1d6de1968b84852f54561cc9a999909b5a9< c6d5fa46c1ee25d068fc730fd377f0f54188d290 affected
6addb1d6de1968b84852f54561cc9a999909b5a9< e748811d9b80a3e101110ff4b3c612e5fca54d98 affected
6addb1d6de1968b84852f54561cc9a999909b5a9< 06a286b320236508d02ab2ccc9496352748652a8 affected
6addb1d6de1968b84852f54561cc9a999909b5a9< 7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b affected
6addb1d6de1968b84852f54561cc9a999909b5a9< bd3c4108a56de34380edab670065e86283cb3029 affected
6addb1d6de1968b84852f54561cc9a999909b5a9< 7e55ca1080f09d9f7112c7f20ac31f682c1f2374 affected
6addb1d6de1968b84852f54561cc9a999909b5a9< 90f305f2c7a30257c683e13f4bf7c798eea992a0 affected
… +10 more rows
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I. Basic Information for CVE-2026-74673

Vulnerability Information
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Vulnerability Title
Input: evdev - fix information leak in evdev_pass_values()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Input: evdev - fix information leak in evdev_pass_values() In evdev_pass_values(), the input_event structure is allocated on the kernel stack and populated field-by-field. However, it is never fully initialized. On architectures where struct input_event contains explicit or implicit padding (such as the 32-bit __pad field on SPARC64), these padding bytes are left uninitialized. When this event structure is subsequently passed to the client buffer and later copied to userspace, the uninitialized padding bytes leak kernel stack memory, potentially exposing sensitive information. Similar issues exist in __evdev_queue_syn_dropped and __pass_event. Fix this by explicitly zeroing the entire event structure with memset() before populating its fields. This ensures all padding bytes are cleared before the data crosses the security boundary.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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基金会开源的一个操作系统内核。 Linux kernel 5.10.265之前版本、5.15.216之前版本、6.1.183之前版本、6.6.152之前版本、6.12.104之前版本、6.18.45之前版本和7.1.9之前版本存在安全漏洞，该漏洞源于evdev_pass_values()函数中input_event结构体未完全初始化，填充字节未清除，可能导致内核栈内存信息泄露，暴露敏感信息。
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 6addb1d6de1968b84852f54561cc9a999909b5a9 ~ d2e3839419ac4047835762c4d7712bda1101b57e -
Linux Linux 2.6.24 -

II. Public POCs for CVE-2026-74673

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III. Intelligence Information for CVE-2026-74673

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Patches & Fixes for CVE-2026-74673 (8)

Same Patch Batch · Linux · 2026-08-22 · 149 CVEs total

CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

Showing top 20 of 149 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74673

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