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CVE-2026-80966— ALSA: portman2x4: Check card index validity at probe

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存在安全漏洞，该漏洞源于portman2x4驱动未检查负的卡索引，通过sysfs绑定时常传入“none”等值，可能导致对index[]及其他参数的越界访问。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 757e119bf52b014b3181eed97b01f87a245b8ff9< 45ea0707298798678a60ff861b695aea049a5469 affected
757e119bf52b014b3181eed97b01f87a245b8ff9< 5d7ac5e9ee5ba76b567ace13b46075caf79dcca0 affected
757e119bf52b014b3181eed97b01f87a245b8ff9< 0048994854f3e9c57b7a754de43ef8da5818d140 affected
757e119bf52b014b3181eed97b01f87a245b8ff9< 64898e9bd8b7b229efa8642b85b56b326a6ec3dc affected
757e119bf52b014b3181eed97b01f87a245b8ff9< 0ce391090809d610647f424b9b1dc24aa2c546fd affected
757e119bf52b014b3181eed97b01f87a245b8ff9< d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8 affected
757e119bf52b014b3181eed97b01f87a245b8ff9< e1ce8ad1009b1736b3044b3324350dcfdd516f42 affected
757e119bf52b014b3181eed97b01f87a245b8ff9< 3690ef20469d5959378260e2752f2314a2572913 affected
… +10 more rows
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I. Basic Information for CVE-2026-80966

Vulnerability Information
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Vulnerability Title
ALSA: portman2x4: Check card index validity at probe
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: portman2x4: Check card index validity at probe Although portman2x4 driver has a check of the given devptr->id value, it doesn't check for a negative id, which is often given as "none" or such value when bound via sysfs. This may lead to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range.
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存在安全漏洞，该漏洞源于portman2x4驱动未检查负的卡索引，通过sysfs绑定时常传入“none”等值，可能导致对index[]及其他参数的越界访问。
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 757e119bf52b014b3181eed97b01f87a245b8ff9 ~ 45ea0707298798678a60ff861b695aea049a5469 -
Linux Linux 2.6.21 -

II. Public POCs for CVE-2026-80966

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III. Intelligence Information for CVE-2026-80966

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Patches & Fixes for CVE-2026-80966 (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-2026-80966

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