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CVE-2026-98912— ALSA: seq: oss: Reject reads that cannot fit the next event

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.

在 Linux 内核中，以下漏洞已得到修复： ALSA: 序列器（seq）: OSS：拒绝无法放入下一个事件的读取操作 函数会在从读取队列中移除下一个已排队的 OSS 序列器事件之前，检查该事件是否能容纳在剩余的用户空间缓冲区中。 然而，该检查逻辑被写反了。当前实现会在事件大小小于剩余缓冲区时停止，导致正常的 4 字节事件在 8 字节的读取缓冲区中未被复制。相反，8 字节的事件却可能被复制到更小的读取计数中。 正确的做法是：仅当剩余的用户空间缓冲区小于下一个事件时才中断读取，并且如果未能复制任何完整的事件，则返回

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-98912

Vulnerability Information
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Vulnerability Title
ALSA: seq: oss: Reject reads that cannot fit the next event
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: oss: Reject reads that cannot fit the next event snd_seq_oss_read() checks whether the next queued OSS sequencer event fits in the remaining userspace buffer before removing it from the read queue. The check is inverted. It currently stops when the event is smaller than the remaining buffer, so a normal 4-byte event is not copied for an 8-byte read buffer. Conversely, an 8-byte event can be copied for a smaller read count. Break only when the remaining userspace buffer is smaller than the next event, and report -EINVAL if no complete event has been copied. This prevents an undersized read from looking like end-of-file while leaving the event queued for a later read with a large enough buffer.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ b3b4b647313757a275be7f7f9d0415d0a90acf73 -
Linux Linux 5.10.271 ~ 5.10.* -

II. Public POCs for CVE-2026-98912

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III. Intelligence Information for CVE-2026-98912

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Other References for CVE-2026-98912 (7)

Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total

CVE-2026-98938 rust: irq: pass RegistrationInner as cookie to request_irq
CVE-2026-98951 riscv: ptrace: Zero-initialize regset buffers before copyin
CVE-2026-98950 flow_dissector: avoid u16 truncation of hlen in bpf_flow_dissect()
CVE-2026-98949 drm/imagination: Fix reference and vm_bo handling in remap()
CVE-2026-98948 mlxsw: spectrum_flower: Fix port range register leak in tmplt_create()
CVE-2026-98947 vsock: Fix memory leak in vmci_transport_recv_dgram_cb()
CVE-2026-98946 drm/vc4: Disable the V3D interrupt across runtime suspend
CVE-2026-98945 HID: steam: Rearrange teardown sequence
CVE-2026-98944 HID: steam: Refactor registration
CVE-2026-98943 HID: steam: Clean up locking
CVE-2026-98942 sched_ext: Build the cid tables privately and publish them with RCU
CVE-2026-98941 ext4: don't enable large folios on encrypted inodes
CVE-2026-98940 ASoC: qcom: lpass-cpu: use DAI table index for playback constraints
CVE-2026-98939 x86/mm: Drop unnecessary PMD page copy when freeing
CVE-2026-98927 KVM: arm64: nv: Fix life cycle of the nested_mmus array
CVE-2026-98930 KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
CVE-2026-98929 macsec: initialize SecY before registering the netdevice
CVE-2026-98928 KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2
CVE-2026-98931 mtd: spinand: fix NULL pointer dereference with no ECC engine
CVE-2026-98926 drm/amd/display: Remove sink usage from DPMS

Showing top 20 of 218 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98912

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