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CVE-2025-38078— ALSA: pcm: Fix race of buffer access at PCM OSS layer

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PCM OSS层的缓冲区访问竞争条件，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c0e05a76fc727929524ef24a19c302e6dd40233f affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8170d8ec4efd0be352c14cb61f374e30fb0c2a25 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 10217da9644ae75cea7330f902c35fc5ba78bbbf affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f3e14d706ec18faf19f5a6e75060e140fea05d4a affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 74d90875f3d43f3eff0e9861c4701418795d3455 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< bf85e49aaf3a3c5775ea87369ea5f159c2148db4 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< afa56c960fcb4db37f2e3399f28e9402e4e1f470 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 93a81ca0657758b607c3f4ba889ae806be9beb73 affected
… +10 more rows
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I. Basic Information for CVE-2025-38078

Vulnerability Information
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Vulnerability Title
ALSA: pcm: Fix race of buffer access at PCM OSS layer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix race of buffer access at PCM OSS layer The PCM OSS layer tries to clear the buffer with the silence data at initialization (or reconfiguration) of a stream with the explicit call of snd_pcm_format_set_silence() with runtime->dma_area. But this may lead to a UAF because the accessed runtime->dma_area might be freed concurrently, as it's performed outside the PCM ops. For avoiding it, move the code into the PCM core and perform it inside the buffer access lock, so that it won't be changed during the operation.
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PCM OSS层的缓冲区访问竞争条件，可能导致释放后重用。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ c0e05a76fc727929524ef24a19c302e6dd40233f -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2025-38078

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III. Intelligence Information for CVE-2025-38078

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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075 9.8 CRITICAL scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-50028 7.8 HIGH gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-50101 7.8 HIGH video: fbdev: vt8623fb: Check the size of screen before memset_io()
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2022-49950 7.8 HIGH misc: fastrpc: fix memory corruption on open
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2022-50182 7.8 HIGH media: imx-jpeg: Align upwards buffer size
CVE-2025-38058 7.8 HIGH __legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38065 7.8 HIGH orangefs: Do not truncate file size
CVE-2025-38068 7.8 HIGH crypto: lzo - Fix compression buffer overrun

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38078

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