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CVE-2026-46119— libceph: Fix slab-out-of-bounds access in auth message processing

CVSS 9.1 · Critical EPSS 0.05% · P15

Possible ATT&CK Techniques 1AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc< 2ae0afd98432536562fa8261538ae795446f0589affected
4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc< 408e85ee708b6aa03eeb0220ffa0915f4d407181affected
4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc< b7df9fbd4869fdfe09a3f501ffd228486521e062affected
4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc< 8517b6c8d2c759918ba0058cb6c7e14d59643202affected
4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc< 1c439de70b1c3eb3c6bffa8245c16b9fc318f114affected
2.6.34affected
< 2.6.34unaffected
6.6.140≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-46119

Vulnerability Information
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Vulnerability Title
libceph: Fix slab-out-of-bounds access in auth message processing
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix slab-out-of-bounds access in auth message processing If a (potentially corrupted) message of type CEPH_MSG_AUTH_REPLY contains a positive value in its result field, it is treated as an error code by ceph_handle_auth_reply() and returned to handle_auth_reply(). Thereafter, an attempt is made to send the preallocated message of type CEPH_MSG_AUTH, where the returned value is interpreted as the size of the front segment to send. If the result value in the message is greater than the size of the memory buffer allocated for the front segment, an out-of-bounds access occurs, and the content of the memory region beyond this buffer is sent out. This patch fixes the issue by treating only negative values in the result field as errors. Positive values are therefore treated as success in the same way as a zero value. Additionally, a BUG_ON is added to __send_prepared_auth_request() comparing the len parameter to front_alloc_len to prevent sending the message if it exceeds the bounds of the allocation and to make it easier to catch any logic flaws leading to this.
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libceph认证消息处理中存在越界访问，可能导致发送超出缓冲区的内容。
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 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc ~ 2ae0afd98432536562fa8261538ae795446f0589 -
LinuxLinux 2.6.34 -

II. Public POCs for CVE-2026-46119

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III. Intelligence Information for CVE-2026-46119

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Patches & Fixes for CVE-2026-46119 (5)

Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total

CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461388.1 HIGHBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-461977.8 HIGHdrm/amdkfd: validate SVM ioctl nattr against buffer size
CVE-2026-461457.8 HIGHRDMA/mana: Validate rx_hash_key_len
CVE-2026-461767.8 HIGHRDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
CVE-2026-461577.8 HIGHALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46119

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