scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()

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Summary

CVECVE-2026-46149
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:30 UTC
Updated2026-05-30 11:17:23 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.000180000 probability, percentile 0.051640000 (date 2026-05-29)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 1f678d13e939f91840cb1ebe9b88544923539d3c git Not specified
CNA Linux Linux affected c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e git Not specified
CNA Linux Linux affected c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 00d91bfdce5033f5d9b4915638ae9b0553848b5d git Not specified
CNA Linux Linux affected c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 e501154f9d82c95d2719bcbbaf679d8fd3226ef7 git Not specified
CNA Linux Linux affected c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 772a896a56e0e3ef9424a025cec9176f9d8f4552 git Not specified
CNA Linux Linux affected 2.6.38 Not specified
CNA Linux Linux unaffected 2.6.38 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/772a896a56e0e3ef9424a025cec9176f9d8f4552 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1f678d13e939f91840cb1ebe9b88544923539d3c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/00d91bfdce5033f5d9b4915638ae9b0553848b5d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e501154f9d82c95d2719bcbbaf679d8fd3226ef7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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