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CVE-2026-68157— libceph: guard missing CRUSH type name lookup

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libceph在CRUSH类型名称查找时缺少防护，get_immediate_parent()解引用空指针并传递给strcmp函数，可能导致空指针取消引用。

CVSS 7.5 · High EPSS 0.69% · P50

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 117d96a04f007ce8fc2e292369056c3bd09f6f63< cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0 affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< 8ff579ac03d6e9d17d6d9c8443110167c14a382d affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< 6a4b75d90f0cfbf22c14742ab35a803bc13f36ec affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< c46d82c47afc968d6ee8ef4470fa2dd35b765c21 affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< 3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50 affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< 4716a64b7cc2797741f7be4e283ace78a9dff37d affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64d affected
117d96a04f007ce8fc2e292369056c3bd09f6f63< bbeae12fda3384a90fbebc8a19ba9d33f85b5361 affected
… +10 more rows
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I. Basic Information for CVE-2026-68157

Vulnerability Information
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Vulnerability Title
libceph: guard missing CRUSH type name lookup
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: libceph: guard missing CRUSH type name lookup Localized read selection can walk a parent bucket whose name exists in the CRUSH map while its type has no matching entry in type_names. get_immediate_parent() then dereferences a NULL type_cn and passes an invalid pointer into strcmp(), causing a null-ptr-deref. Skip such malformed parent buckets unless both the bucket name and type name metadata are present. This keeps malformed hierarchy data from crashing locality lookup and safely falls back to "not local". [ idryomov: add WARN_ON_ONCE ]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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libceph在CRUSH类型名称查找时缺少防护，get_immediate_parent()解引用空指针并传递给strcmp函数，可能导致空指针取消引用。
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 117d96a04f007ce8fc2e292369056c3bd09f6f63 ~ cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0 -
Linux Linux 5.8 -

II. Public POCs for CVE-2026-68157

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III. Intelligence Information for CVE-2026-68157

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Patches & Fixes for CVE-2026-68157 (7)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68157

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