01 Record

CVE-2026-63887

scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.78% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 53.1% of scored records. A rank, not a probability.
NVD base score: 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Awaiting Analysis. NVD last modified this record on 2026-07-27.
Red Hat severity: Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-19 14:55Z1 MO AGO

Last updated

2026-08-05 12:36Z1 MO AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

2e6bfced7e3b5534dc0cb1656120209cbf93bb69dc3df16e64be2da3dfa76840

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxe48354ce078c079996f89d715dfa44814b4eba01 to < cb84e974fb172bc71386289f37b78ea679410b39, e48354ce078c079996f89d715dfa44814b4eba01 to < b19382dfc6e7dee6d3859ba44b6ca29e97a51627, e48354ce078c079996f89d715dfa44814b4eba01 to < efe633e600a0ac68357206fede21b1ac8178f3b8, e48354ce078c079996f89d715dfa44814b4eba01 to < 4e9f0c4a645c995bc75c06c7b3644254ffb4c76b, e48354ce078c079996f89d715dfa44814b4eba01 to < 30bf335e8fe170322080ee001f05ca29c50680b3, e48354ce078c079996f89d715dfa44814b4eba01 to < 594a40360012ce5f94c715d5e3b20fa3af7d525a, e48354ce078c079996f89d715dfa44814b4eba01 to < 26e4a304b7e6f1338c675d527608d32549c091db, e48354ce078c079996f89d715dfa44814b4eba01 to < bf33e01f88388c43e285492a63e539df6ffed64c, 3.1—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/cb84e974fb172bc71386289f37b78ea679410b39
git.kernel.orghttps://git.kernel.org/stable/c/b19382dfc6e7dee6d3859ba44b6ca29e97a51627
git.kernel.orghttps://git.kernel.org/stable/c/efe633e600a0ac68357206fede21b1ac8178f3b8
git.kernel.orghttps://git.kernel.org/stable/c/4e9f0c4a645c995bc75c06c7b3644254ffb4c76b
git.kernel.orghttps://git.kernel.org/stable/c/30bf335e8fe170322080ee001f05ca29c50680b3
git.kernel.orghttps://git.kernel.org/stable/c/594a40360012ce5f94c715d5e3b20fa3af7d525a
git.kernel.orghttps://git.kernel.org/stable/c/26e4a304b7e6f1338c675d527608d32549c091db
git.kernel.orghttps://git.kernel.org/stable/c/bf33e01f88388c43e285492a63e539df6ffed64c

01 Record index

CVE-2026-63887

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-63887

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References