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CVE-2026-43279— ALSA: usb-audio: Add sanity check for OOB writes at silencing

CVSS 7.8 · High EPSS 0.01% · P2

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxc75a8a7ae565d7cd9baa87a504ba9162e355b4b0< fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1faffected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< 780dc57794a217b49994fa1d0b42465fb10a00aaaffected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< 8995fc0e00b3fee9bf7ecb3d836b635b730c1049affected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< fc9e5af60dc199051dc202ae78e1fe76a9977a5eaffected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< 6af16f1b8649df4c00d6ced924bdd8b72c885b6aaffected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< ccaf9296763be4f76b59e2cac377006016c34435affected
c75a8a7ae565d7cd9baa87a504ba9162e355b4b0< fba2105a157fffcf19825e4eea498346738c9948affected
3.5affected
… +8 more rows
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I. Basic Information for CVE-2026-43279

Vulnerability Information
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Vulnerability Title
ALSA: usb-audio: Add sanity check for OOB writes at silencing
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode before the actual playback, we blindly assume that the received packets fit with the buffer size. But when the setup in the capture stream differs from the playback stream (e.g. due to the USB core limitation of max packet size), such an inconsistency may lead to OOB writes to the buffer, resulting in a crash. For addressing it, add a sanity check of the transfer buffer size at prepare_silent_urb(), and stop the data copy if the received data overflows. Also, report back the transfer error properly from there, too. Note that this doesn't fix the root cause of the playback error itself, but this merely covers the kernel Oops.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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ALSA usb-audio中prepare_silent_urb函数未验证传输缓冲区大小，可能导致越界写入。
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 c75a8a7ae565d7cd9baa87a504ba9162e355b4b0 ~ fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1f -
LinuxLinux 3.5 -

II. Public POCs for CVE-2026-43279

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III. Intelligence Information for CVE-2026-43279

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Patch · 7

Same Patch Batch · Linux · 2026-05-06 · 225 CVEs total

CVE-2026-431859.8 CRITICALksmbd: fix signededness bug in smb_direct_prepare_negotiation()
CVE-2026-431869.8 CRITICALipv6: ioam: fix heap buffer overflow in __ioam6_fill_trace_data()
CVE-2026-431989.8 CRITICALtcp: fix potential race in tcp_v6_syn_recv_sock()
CVE-2026-432089.8 CRITICALnet: do not pass flow_id to set_rps_cpu()
CVE-2026-431259.8 CRITICALdlm: validate length in dlm_search_rsb_tree
CVE-2026-431149.4 CRITICALnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
CVE-2026-431979.1 CRITICALnetconsole: avoid OOB reads, msg is not nul-terminated
CVE-2026-430839.1 CRITICALnet: ioam6: fix OOB and missing lock
CVE-2026-431179.1 CRITICALbtrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
CVE-2026-431128.8 HIGHfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
CVE-2026-431588.8 HIGHxfs: fix freemap adjustments when adding xattrs to leaf blocks
CVE-2026-432158.8 HIGHcifs: Fix locking usage for tcon fields
CVE-2026-431768.8 HIGHwifi: rtw89: pci: validate release report content before using for RTL8922DE
CVE-2026-431878.8 HIGHxfs: delete attr leaf freemap entries when empty
CVE-2026-432328.8 HIGHnet: wan: farsync: Fix use-after-free bugs caused by unfinished tasklets
CVE-2026-432838.8 HIGHnet: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
CVE-2026-431728.8 HIGHwifi: iwlwifi: fix 22000 series SMEM parsing
CVE-2026-432398.8 HIGHsmb: client: prevent races in ->query_interfaces()
CVE-2026-432498.8 HIGH9p/xen: protect xen_9pfs_front_free against concurrent calls
CVE-2026-431138.8 HIGHwifi: wl1251: validate packet IDs before indexing tx_frames

Showing top 20 of 225 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43279

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