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VulnerabilityPublished Updated

CVE-2026-46149: Linux kernel · scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · CVSS 7.1 High · fixed in e501154f9d82c95d2719bcbbaf679d8fd3226ef7 : patch Linux kernel soon.

Data as of 26 Oct 2026, 13:07 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-10-16.

Patch
Available – fixed in e501154f9d82c95d2719bcbbaf679d8fd3226ef7, db0a4759d62cad4ff891e2d81ae4be73bb57f4a4, d3cc9d490c207d57a289054397349f6f8c90354e +5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < e501154f9d82c95d2719bcbbaf679d8fd3226ef7
Fixed in
  • e501154f9d82c95d2719bcbbaf679d8fd3226ef7
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < db0a4759d62cad4ff891e2d81ae4be73bb57f4a4
Fixed in
  • db0a4759d62cad4ff891e2d81ae4be73bb57f4a4
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < d3cc9d490c207d57a289054397349f6f8c90354e
Fixed in
  • d3cc9d490c207d57a289054397349f6f8c90354e
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < 772a896a56e0e3ef9424a025cec9176f9d8f4552
Fixed in
  • 772a896a56e0e3ef9424a025cec9176f9d8f4552
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < 72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e
Fixed in
  • 72cc5ea7ef32bb5fa38bf0dd2e56fcd73aa8c89e
LinuxLinuxAffected
  • ≥ c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5, < 12f2201a56957ba020392223a7393a5eba080c1b
Fixed in
  • 12f2201a56957ba020392223a7393a5eba080c1b

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.

References

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