VulnerabilityPublished 4 Feb 2026Updated 5 Nov 2026

CVE-2026-23087: Linux kernel · scsi: xen: scsiback: Fix potential memory leak in scsiback_remove()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f86264ec0e2b102fcd49bf3e4f32fee669d482fc : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

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, 2026-11-05.

Patch

Available – fixed in f86264ec0e2b102fcd49bf3e4f32fee669d482fc, a8bb3ec8d85951a56af0a72d93ccbc2aee42eef9, 901a5f309daba412e2a30364d7ec1492fa11c32c +4

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < f86264ec0e2b102fcd49bf3e4f32fee669d482fc	Fixed in f86264ec0e2b102fcd49bf3e4f32fee669d482fc
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < a8bb3ec8d85951a56af0a72d93ccbc2aee42eef9	Fixed in a8bb3ec8d85951a56af0a72d93ccbc2aee42eef9
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < 901a5f309daba412e2a30364d7ec1492fa11c32c	Fixed in 901a5f309daba412e2a30364d7ec1492fa11c32c
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < 427b0fb30ddec3bad05dcd73b00718f98c7026d2	Fixed in 427b0fb30ddec3bad05dcd73b00718f98c7026d2
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < 32e52b56056daf0f0881fd9254706acf25b4be97	Fixed in 32e52b56056daf0f0881fd9254706acf25b4be97
LinuxLinux	Affected ≥ d9d660f6e562a47b4065eeb7e538910b0471b988, < 24c441f0e24da175d7912095663f526ac480dc4f	Fixed in 24c441f0e24da175d7912095663f526ac480dc4f

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: xen: scsiback: Fix potential memory leak in scsiback_remove() Memory allocated for struct vscsiblk_info in scsiback_probe() is not freed in scsiback_remove() leading to potential memory leaks on remove, as well as in the scsiback_probe() error paths. Fix that by freeing it in scsiback_remove().

References

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