CVE-2026-46149
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.14% probability · 4th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/00d91bfdce5033f5d9b4915638ae9b0553848b5dPatch
- https://git.kernel.org/stable/c/12f2201a56957ba020392223a7393a5eba080c1bPatch
- https://git.kernel.org/stable/c/1f678d13e939f91840cb1ebe9b88544923539d3cPatch
- https://git.kernel.org/stable/c/72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89ePatch
- https://git.kernel.org/stable/c/772a896a56e0e3ef9424a025cec9176f9d8f4552Patch
- https://git.kernel.org/stable/c/d3cc9d490c207d57a289054397349f6f8c90354ePatch
- https://git.kernel.org/stable/c/db0a4759d62cad4ff891e2d81ae4be73bb57f4a4Patch
- https://git.kernel.org/stable/c/e501154f9d82c95d2719bcbbaf679d8fd3226ef7Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.