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CVE-2026-89575— dm raid1: reserve space for NUL-terminator in build_constructor_string()

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基金会开源的一个操作系统内核。 Linux kernel 2.6.31版本存在安全漏洞，该漏洞源于dm raid1的build_constructor_string()函数未为终止NUL预留足够空间，可能导致缓冲区溢出。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.23% · P13

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f5db4af466e2dca0fe822019812d586ca910b00c< 35ba81c93fe7392c973af9881640180490e76f34 affected
f5db4af466e2dca0fe822019812d586ca910b00c< 1fcc9f9f35653c5ee1a8b144ec96ff3fc48532f7 affected
f5db4af466e2dca0fe822019812d586ca910b00c< 7b035983b895db3ae01d9855963d42541db42125 affected
f5db4af466e2dca0fe822019812d586ca910b00c< 01a0276706c7b6fb758a8e2ff9cf221a3dfcae97 affected
f5db4af466e2dca0fe822019812d586ca910b00c< 0a3657ebd6b517b60cdc5123894047616974e25b affected
f5db4af466e2dca0fe822019812d586ca910b00c< 644140527ae494cedf3b5c0ecd16287deaea7a66 affected
f5db4af466e2dca0fe822019812d586ca910b00c< f79b53ca3a68a46c6fc3b30b148d1dfb1b33ea8b affected
f5db4af466e2dca0fe822019812d586ca910b00c< 73c37fe54cd056d07461b142ab0b8b81e1ef6ad8 affected
… +10 more rows
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I. Basic Information for CVE-2026-89575

Vulnerability Information
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Vulnerability Title
dm raid1: reserve space for NUL-terminator in build_constructor_string()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dm raid1: reserve space for NUL-terminator in build_constructor_string() Reserve space for the termination NUL after the maximum 20 decimal digits of a long long value to avoid buffer overflow in sprintf().
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基金会开源的一个操作系统内核。 Linux kernel 2.6.31版本存在安全漏洞，该漏洞源于dm raid1的build_constructor_string()函数未为终止NUL预留足够空间，可能导致缓冲区溢出。
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 f5db4af466e2dca0fe822019812d586ca910b00c ~ 35ba81c93fe7392c973af9881640180490e76f34 -
Linux Linux 2.6.31 -

II. Public POCs for CVE-2026-89575

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III. Intelligence Information for CVE-2026-89575

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Patches & Fixes for CVE-2026-89575 (8)

Same Patch Batch · Linux · 2026-09-11 · 431 CVEs total

CVE-2026-89688 9.8 CRITICAL nfsd: drop the stateid, not the stateowner, on seqid_op replay retry
CVE-2026-89656 9.8 CRITICAL libceph: reject buckets with mismatched CRUSH ids
CVE-2026-89655 9.8 CRITICAL ceph: fix UAF in __kick_flushing_caps() on cf entry freed during unlock
CVE-2026-89658 9.8 CRITICAL NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup
CVE-2026-89660 9.8 CRITICAL NFSD: Prevent client use-after-free during admin state revocation
CVE-2026-89659 9.8 CRITICAL NFSD: Prevent client use-after-free during delegation revoke
CVE-2026-89662 9.8 CRITICAL NFSD: Prevent lock owner use-after-free during client teardown
CVE-2026-89669 9.8 CRITICAL nfsd: initialize copy-notify stateid before publishing it
CVE-2026-89674 9.8 CRITICAL nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget
CVE-2026-89675 9.8 CRITICAL nfsd: fix UAF in async copy cancel and shutdown
CVE-2026-89676 9.8 CRITICAL nfsd: fix stale s2s_cp_stateids IDR entry for async COPY
CVE-2026-89677 9.8 CRITICAL nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
CVE-2026-89681 9.8 CRITICAL nfsd: fix layout fence worker double-reference race
CVE-2026-89686 9.8 CRITICAL nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke
CVE-2026-89703 9.8 CRITICAL nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
CVE-2026-89479 9.8 CRITICAL sctp: stop processing a packet once its association is deleted
CVE-2026-89478 9.8 CRITICAL sctp: drop a chunk if its transport was removed
CVE-2026-89702 9.8 CRITICAL nfsd: size fh_verify server sockaddr slot by xpt_locallen
CVE-2026-89482 9.8 CRITICAL nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
CVE-2026-89708 9.8 CRITICAL nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

Showing top 20 of 431 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89575

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