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CVE-2026-46149— scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()

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scsi target configfs中tg_pt_gp_members_show()函数snprintf()返回值未绑定，可能导致栈缓冲区读取越界。

CVSS 7.1 · High EPSS 0.14% · P4

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< d3cc9d490c207d57a289054397349f6f8c90354e affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< db0a4759d62cad4ff891e2d81ae4be73bb57f4a4 affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< 12f2201a56957ba020392223a7393a5eba080c1b affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< 1f678d13e939f91840cb1ebe9b88544923539d3c affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< 72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< 00d91bfdce5033f5d9b4915638ae9b0553848b5d affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< e501154f9d82c95d2719bcbbaf679d8fd3226ef7 affected
c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5< 772a896a56e0e3ef9424a025cec9176f9d8f4552 affected
… +10 more rows
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I. Basic Information for CVE-2026-46149

Vulnerability Information
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Vulnerability Title
scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() target_tg_pt_gp_members_show() formats LUN paths with snprintf() into a 256-byte stack buffer, then will memcpy() cur_len bytes from that buffer. snprintf() returns the length the output would have had, which can exceed the buffer size when the fabric WWN is long because iSCSI IQN names can be up to 223 bytes. The check at the memcpy() site only guards the destination page write, not the source read, so memcpy() will read past the stack buffer and copy adjacent stack contents to the sysfs reader, which when CONFIG_FORTIFY_SOURCE is enabled, fortify_panic() will be triggered. Commit 27e06650a5ea ("scsi: target: target_core_configfs: Add length check to avoid buffer overflow") added the same bound to the target_lu_gp_members_show() but the tg_pt_gp variant was missed so resolve that here.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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scsi target configfs中tg_pt_gp_members_show()函数snprintf()返回值未绑定，可能导致栈缓冲区读取越界。
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 c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 ~ d3cc9d490c207d57a289054397349f6f8c90354e -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2026-46149

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III. Intelligence Information for CVE-2026-46149

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Patches & Fixes for CVE-2026-46149 (7)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger
CVE-2026-46173 7.8 HIGH exit: prevent preemption of oopsing TASK_DEAD task
CVE-2026-46210 7.8 HIGH media: iris: fix use-after-free of fmt_src during MBPF check

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46149

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