--- id: CVE-2026-46149 title: |- 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 buffe… summary: |- 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 buffe… severity: high cvss: 7.1 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H' cwe: - CWE-674 - CWE-120 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 2.6.38, < 5.10.258' - 'linux_kernel >= 5.11, < 5.15.209' - 'linux_kernel >= 5.16, < 6.1.175' - 'linux_kernel >= 6.2, < 6.6.140' - 'linux_kernel >= 6.7, < 6.12.88' - 'linux_kernel >= 6.13, < 6.18.30' - 'linux_kernel >= 6.19, < 7.0.7' - linux_kernel = 7.1 patched: - linux_kernel 7.0.7 published: '2026-05-28' updated: '2026-10-15' sourceUpdated: '2026-10-15T02:19:46.597' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46149' references: - url: 'https://git.kernel.org/stable/c/00d91bfdce5033f5d9b4915638ae9b0553848b5d' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/12f2201a56957ba020392223a7393a5eba080c1b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/1f678d13e939f91840cb1ebe9b88544923539d3c' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/772a896a56e0e3ef9424a025cec9176f9d8f4552' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d3cc9d490c207d57a289054397349f6f8c90354e' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/db0a4759d62cad4ff891e2d81ae4be73bb57f4a4' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/e501154f9d82c95d2719bcbbaf679d8fd3226ef7' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46149.json - url: 'https://access.redhat.com/security/cve/CVE-2026-46149' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2482566' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-46149' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46149' - url: >- https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46149-ad2e@gregkh/T - url: 'https://access.redhat.com/errata/RHSA-2026:83707' - url: 'https://access.redhat.com/errata/RHSA-2026:67471' - url: 'https://access.redhat.com/errata/RHSA-2026:66180' - url: 'https://access.redhat.com/errata/RHSA-2026:66325' - url: 'https://access.redhat.com/errata/RHSA-2026:79783' - url: 'https://access.redhat.com/errata/RHSA-2026:66324' - url: 'https://access.redhat.com/errata/RHSA-2026:84677' - url: 'https://access.redhat.com/errata/RHSA-2026:84793' tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00142 epssPercentile: 0.03445 ingestedAt: '2026-10-15T03:30:12.891Z' ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-10-16T15:20:25.998388Z' scores: nvd: 7.1 vendor: 7 cna: 7.1 --- ## Overview 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. ## Affected - `linux_kernel >= 2.6.38, < 5.10.258` - `linux_kernel >= 5.11, < 5.15.209` - `linux_kernel >= 5.16, < 6.1.175` - `linux_kernel >= 6.2, < 6.6.140` - `linux_kernel >= 6.7, < 6.12.88` - `linux_kernel >= 6.13, < 6.18.30` - `linux_kernel >= 6.19, < 7.0.7` - `linux_kernel = 7.1` ## Remediation Upgrade past the affected range: - `linux_kernel 7.0.7` ## Vendor advisories - **RHSA-2026:83707** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0) · released 2026-10-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:83707) - **RHSA-2026:67471** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67471) - **RHSA-2026:66180** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66180) - **RHSA-2026:66325** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66325) - **RHSA-2026:79783** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) · released 2026-10-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:79783) - **RHSA-2026:66324** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:66324) - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46149.json) - **RHSA-2026:84677** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84677) - **RHSA-2026:84793** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8) · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84793)