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CVE-2026-80949— wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()

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 3.8版本存在安全漏洞，该漏洞源于brcmf_sdio_read_control()函数中为buf分配的内存在部分错误路径中未被释放，可能导致内存泄漏。

AI Predicted 3.7 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1560 · Archive Collected Data

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< b1d0a90a844abccdfed9fe141b5d0d654a821485 affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< 86b57fa3172e287bc083113507a965e6d9a46a45 affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< a732c4f36a4cd79f3702391f88ebb56f2e43b0ee affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< 7704f6ba2a8c492b07a3eaa1e311b4b30d389246 affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< fdb880a7d575efe8b5c7b5b819b96d9251a3937f affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< 261d7c7610b4b2f476382c88a2d1ae0cc5e07add affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< ba04715ee672c336272be3ceb43bda9ffc33eb75 affected
dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969< 0d10db8e94fcb23a799789aaa696b4d8f937e207 affected
… +10 more rows
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I. Basic Information for CVE-2026-80949

Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control() The memory allocated for buf is not freed in some of the error paths in brcmf_sdio_read_control(). Fix that by adding vfree() calls. [arend: rework as suggested by Johannes]
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 3.8版本存在安全漏洞，该漏洞源于brcmf_sdio_read_control()函数中为buf分配的内存在部分错误路径中未被释放，可能导致内存泄漏。
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 dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 ~ b1d0a90a844abccdfed9fe141b5d0d654a821485 -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-80949

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III. Intelligence Information for CVE-2026-80949

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Patches & Fixes for CVE-2026-80949 (7)

Vendor Advisories for CVE-2026-80949 (1)

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-2026-80949

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