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CVE-2026-43406— libceph: prevent potential out-of-bounds reads in process_message_header()

CVSS 9.1 · Critical EPSS 0.02% · P7
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I. Basic Information for CVE-2026-43406

Vulnerability Information
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Vulnerability Title
libceph: prevent potential out-of-bounds reads in process_message_header()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds reads in process_message_header() If the message frame is (maliciously) corrupted in a way that the length of the control segment ends up being less than the size of the message header or a different frame is made to look like a message frame, out-of-bounds reads may ensue in process_message_header(). Perform an explicit bounds check before decoding the message header.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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process_message_header()中未对消息帧进行边界检查，可能导致越界读取。
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 cd1a677cad994021b19665ed476aea63f5d54f31 ~ 76ccf21a12c5f6d6790bc32c7da82446d877b2f4 -
LinuxLinux 5.11 -

II. Public POCs for CVE-2026-43406

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III. Intelligence Information for CVE-2026-43406

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Same Patch Batch · Linux · 2026-05-08 · 199 CVEs total

CVE-2026-434029.8 CRITICALkthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-433769.8 CRITICALksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-433799.8 CRITICALksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-433849.8 CRITICALnet/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-433419.8 CRITICALnet/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-434659.8 CRITICALnet/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-433049.8 CRITICALlibceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-434149.8 CRITICALscsi: qla2xxx: Completely fix fcport double free
CVE-2026-433839.4 CRITICALnet/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-434079.1 CRITICALlibceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-433348.8 HIGHBluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-432848.8 HIGHxfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-433918.8 HIGHnsfs: tighten permission checks for handle opening
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-2026-432918.3 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
CVE-2026-434528.2 HIGHnetfilter: x_tables: guard option walkers against 1-byte tail reads
CVE-2026-433778.1 HIGHksmbd: Don't log keys in SMB3 signing and encryption key generation

Showing top 20 of 199 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43406

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