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CVE-2026-31583— media: em28xx: fix use-after-free in em28xx_v4l2_open()

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media em28xx中em28xx_v4l2_open释放后重用，可能导致访问已释放内存或空指针取消引用。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 8139a4d583abad45eb987b5a99b3281b6d435b7e< 3c0283a59e36e3707c4a81f4952e362d31f876b8 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< 2cbf81f76842e46bdf25823c70e1db4044a65678 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< 38a327221f7f765e7d853b7bafe47e342441ec85 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< b5d141ea15f173f15b9f0a72965902f3428c0d92 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< 5fb2940327722b4684d2f964b54c1c90aa277324 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< 871b8ea8ef39a6c253594649f4339378fad3d0dd affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< 6b9e66437cc6123ddedac141e1b8b6fcf57d2972 affected
8139a4d583abad45eb987b5a99b3281b6d435b7e< dd2b888e08d3b3d6aacd65d76cd44fac11da750f affected
… +12 more rows
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I. Basic Information for CVE-2026-31583

Vulnerability Information
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Vulnerability Title
media: em28xx: fix use-after-free in em28xx_v4l2_open()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: em28xx: fix use-after-free in em28xx_v4l2_open() em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock, creating a race with em28xx_v4l2_init()'s error path and em28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct and set dev->v4l2 to NULL under dev->lock. This race leads to two issues: - use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler, since the video_device is embedded in the freed em28xx_v4l2 struct. - NULL pointer dereference in em28xx_resolution_set() when accessing v4l2->norm, since dev->v4l2 has been set to NULL. Fix this by moving the mutex_lock() before the dev->v4l2 read and adding a NULL check for dev->v4l2 under the lock.
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media em28xx中em28xx_v4l2_open释放后重用，可能导致访问已释放内存或空指针取消引用。
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 8139a4d583abad45eb987b5a99b3281b6d435b7e ~ 3c0283a59e36e3707c4a81f4952e362d31f876b8 -
Linux Linux 3.16 -

II. Public POCs for CVE-2026-31583

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III. Intelligence Information for CVE-2026-31583

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Patches & Fixes for CVE-2026-31583 (5)

Same Patch Batch · Linux · 2026-04-24 · 138 CVEs total

CVE-2026-31608 9.8 CRITICAL smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list
CVE-2026-31609 9.8 CRITICAL smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
CVE-2026-31657 9.8 CRITICAL batman-adv: hold claim backbone gateways by reference
CVE-2026-31633 9.8 CRITICAL rxrpc: Fix integer overflow in rxgk_verify_response()
CVE-2026-31607 9.8 CRITICAL usbip: validate number_of_packets in usbip_pack_ret_submit()
CVE-2026-31669 9.8 CRITICAL mptcp: fix slab-use-after-free in __inet_lookup_established
CVE-2026-31668 9.8 CRITICAL seg6: separate dst_cache for input and output paths in seg6 lwtunnel
CVE-2026-31659 9.8 CRITICAL batman-adv: reject oversized global TT response buffers
CVE-2026-31589 9.8 CRITICAL mm: call ->free_folio() directly in folio_unmap_invalidate()
CVE-2026-31536 9.8 CRITICAL smb: server: let send_done handle a completion without IB_SEND_SIGNALED
CVE-2026-31637 9.8 CRITICAL rxrpc: reject undecryptable rxkad response tickets
CVE-2026-31649 9.8 CRITICAL net: stmmac: fix integer underflow in chain mode
CVE-2026-31636 9.1 CRITICAL rxrpc: fix RESPONSE authenticator parser OOB read
CVE-2026-31570 8.8 HIGH can: gw: fix OOB heap access in cgw_csum_crc8_rel()
CVE-2026-31558 8.8 HIGH LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust
CVE-2026-31629 8.8 HIGH nfc: llcp: add missing return after LLCP_CLOSED checks
CVE-2026-31588 8.8 HIGH KVM: x86: Use scratch field in MMIO fragment to hold small write values
CVE-2026-31553 8.8 HIGH KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()
CVE-2026-31622 8.8 HIGH NFC: digital: Bounds check NFC-A cascade depth in SDD response handler
CVE-2026-31611 8.6 HIGH ksmbd: require 3 sub-authorities before reading sub_auth[2]

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31583

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