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CVE-2026-43330— crypto: caam - fix overflow on long hmac keys

CVSS 7.8 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux199354d7fb6eaa2cc5bb650af0bca624baffee35< 31022cfde5235c45fa765f0aabeff5f0652852f2affected
199354d7fb6eaa2cc5bb650af0bca624baffee35< c2fb4984fe09fc176fe4c12d5e3edf626df6511daffected
199354d7fb6eaa2cc5bb650af0bca624baffee35< aa545df011338df13f0833fc1fabcb15c0521959affected
199354d7fb6eaa2cc5bb650af0bca624baffee35< cebc5ebd958346195b77f42d0cd5141b4e448faeaffected
199354d7fb6eaa2cc5bb650af0bca624baffee35< 80688afb9c35b3934ce2d6be9973758915e2e0efaffected
6.3affected
< 6.3unaffected
6.6.134≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-43330

Vulnerability Information
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Vulnerability Title
crypto: caam - fix overflow on long hmac keys
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: caam - fix overflow on long hmac keys When a key longer than block size is supplied, it is copied and then hashed into the real key. The memory allocated for the copy needs to be rounded to DMA cache alignment, as otherwise the hashed key may corrupt neighbouring memory. The copying is performed using kmemdup, however this leads to an overflow: reading more bytes (aligned_len - keylen) from the keylen source buffer. Fix this by replacing kmemdup with kmalloc, followed by memcpy.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于crypto caam驱动中长hmac密钥处理溢出，kmemdup读取超出源缓冲区。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 199354d7fb6eaa2cc5bb650af0bca624baffee35 ~ 31022cfde5235c45fa765f0aabeff5f0652852f2 -
LinuxLinux 6.3 -

II. Public POCs for CVE-2026-43330

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III. Intelligence Information for CVE-2026-43330

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Patches & Fixes for CVE-2026-43330 (5)

Same Patch Batch · Linux · 2026-05-08 · 197 CVEs total

CVE-2026-433769.8 CRITICALksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-433789.8 CRITICALsmb: server: fix use-after-free in smb2_open()
CVE-2026-434149.8 CRITICALscsi: qla2xxx: Completely fix fcport double free
CVE-2026-433799.8 CRITICALksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-433419.8 CRITICALnet/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-434029.8 CRITICALkthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-433049.8 CRITICALlibceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-433849.8 CRITICALnet/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-434659.8 CRITICALnet/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-433839.4 CRITICALnet/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-434069.1 CRITICALlibceph: prevent potential out-of-bounds reads in process_message_header()
CVE-2026-434079.1 CRITICALlibceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-432848.8 HIGHxfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-433228.8 HIGHBluetooth: hci_sync: Fix UAF in le_read_features_complete
CVE-2026-434038.8 HIGHnsfs: tighten permission checks for ns iteration ioctls
CVE-2026-433918.8 HIGHnsfs: tighten permission checks for handle opening
CVE-2026-433348.8 HIGHBluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-432918.3 HIGHnet: nfc: nci: Fix parameter validation for packet data
CVE-2026-434668.2 HIGHnet/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery
CVE-2026-433658.2 HIGHxfs: fix undersized l_iclog_roundoff values

Showing top 20 of 197 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43330

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