CVE-2026-89501— ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
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，已修复以下漏洞： 环形缓冲区：调整子缓冲区大小时，需持有 因为 可能会清空 ，因此需要持有 ，以避免与 和 之间发生竞态条件。
Affected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 8e7b58c27b3c567316a51079b375b846f9223bba< 8a496aaa3da6e8d545896c2370c7e617cc931ae2 |
affected |
8e7b58c27b3c567316a51079b375b846f9223bba< 6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2 |
affected | ||
8e7b58c27b3c567316a51079b375b846f9223bba< bf242baf58de03467f226c8e29554c9495dca7fc |
affected | ||
8e7b58c27b3c567316a51079b375b846f9223bba< 24974bd0da1b47fd56c975533ead50abf754e74d |
affected | ||
6.8 |
affected | ||
< 6.8 |
unaffected | ||
6.12.109≤ 6.12.* |
unaffected | ||
6.18.50≤ 6.18.* |
unaffected | ||
| … +2 more rows | |||
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-89501
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
Because, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page,
hold cpu_buffer->lock to prevent races with
ring_buffer_alloc_read_page() and ring_buffer_free_read_page().
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
II. Public POCs for CVE-2026-89501
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-89501
请登录查看更多情报信息。
Other References for CVE-2026-89501 (4)
Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total
| CVE-2026-89491 | ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin() | |
| CVE-2026-89477 | sctp: fix NULL deref on untransmitted RECONF completion | |
| CVE-2026-89478 | sctp: drop a chunk if its transport was removed | |
| CVE-2026-89479 | sctp: stop processing a packet once its association is deleted | |
| CVE-2026-89480 | nvme-tcp: reject a read that transferred too few bytes | |
| CVE-2026-89482 | nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone | |
| CVE-2026-89481 | nvme-tcp: fix host memory disclosure on R2T for a read command | |
| CVE-2026-89483 | nvme: zero the discard fallback page | |
| CVE-2026-89484 | lockd: fix NULL dereference on lockowner allocation failure | |
| CVE-2026-89485 | lockd: pin next file across nlm_inspect_file lock-drop | |
| CVE-2026-89486 | ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user() | |
| CVE-2026-89487 | openvswitch: only skb_tx_error() a packet we are about to drop | |
| CVE-2026-89488 | openvswitch: Fix CT limit teardown use-after-free | |
| CVE-2026-89489 | openrisc: fix arbitrary kernel memory access via or1k_atomic syscall | |
| CVE-2026-89500 | ring-buffer: Make cpu_buffer::free_page a buffer_data_read_page | |
| CVE-2026-89497 | orangefs: skip leading spaces before parsing client debug masks | |
| CVE-2026-89498 | orangefs: fix double-free of trailer_buf on readdir copy failure | |
| CVE-2026-89499 | ring-buffer: Stop remote reader update when page swap fails | |
| CVE-2026-89496 | ocfs2: always run deallocs on copy-on-write completion | |
| CVE-2026-89502 | ring-buffer: Free cpu_buffer::free_page with subbuf_order |
Showing top 20 of 431 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-89773
drm/amd/display: Skip Update HDCP Config In Transition State -
CVE-2026-89772
btrfs: write-protect folios during data writeback -
CVE-2026-89771
ring-buffer: Fix subbuf resize race with ring buffer readers -
CVE-2026-89770
iomap: don't free integrity payload that doesn't exist -
CVE-2026-89769
clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_sta
Same vendor: Linux
-
CVE-2026-89773
drm/amd/display: Skip Update HDCP Config In Transition State -
CVE-2026-89772
btrfs: write-protect folios during data writeback -
CVE-2026-89771
ring-buffer: Fix subbuf resize race with ring buffer readers -
CVE-2026-89770
iomap: don't free integrity payload that doesn't exist -
CVE-2026-89769
clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_sta
V. Comments for CVE-2026-89501
No comments yet