CVE-2026-64103scsi: isci: Fix use-after-free in device removal path
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: isci: Fix use-after-free in device removal path The ISCI completion tasklet is initialized in isci_host_alloc() (drivers/scsi/isci/init.c:496) and scheduled from both MSI-X and legacy interrupt handlers (drivers/scsi/isci/host.c:223,613). isci_host_deinit() stops the controller and waits for stop completion, but it never kills completion_tasklet before teardown continues. A top-of-function tasklet_kill() is not sufficient here: interrupts are only disabled when isci_host_stop_complete() runs, so until wait_for_stop() returns the IRQ handlers can still requeue the tasklet. The tasklet callback also re-enables interrupts after draining completions, so killing the tasklet before the source is quiesced leaves the same race open. Once wait_for_stop() returns, no further IRQ-driven scheduling can occur. Kill completion_tasklet there so teardown cannot race a queued tasklet running on a dead ihost. On remove or unload, the stale callback can otherwise dereference ihost and touch ihost->smu_registers after the host lifetime ends. A UML + KASAN analogue reproduced the failure class both with no tasklet_kill() and with tasklet_kill() placed before source quiesce, and stayed clean once the kill happened after quiescing the scheduling source. This mirrors commit f6ab594672d4 ("scsi: aic94xx: fix use-after-free in device removal path"), but ISCI needs the kill after wait_for_stop().
Timeline
ID reserved
By Linux
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < 1412995e10c74644b47f242aea6e4f3d4180e806
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < a83d3e4daba40d49324cec1c51ed261e1ea48cf1
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < ab2266601a875982f2d2033f41e070a6d5e615e2
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < 309c6058622d080fe8c2fab87c30da82d834d989
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < cb9e72c50e6c81a5903f27e0b397ce8525d7539b
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < b9ff8631006233ba246828ac70409d2cb2da38d3
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < 6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c
- affected 6f231dda68080759f1aed3769896e94c73099f0f – < b52a8d52c3125ec9a93106ed816582368de34426
- affected 3.0
- unaffected < 3.0
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/1412995e10c74644b47f242aea6e4f3d4180e806 (opens in a new tab)
- https://git.kernel.org/stable/c/a83d3e4daba40d49324cec1c51ed261e1ea48cf1 (opens in a new tab)
- https://git.kernel.org/stable/c/ab2266601a875982f2d2033f41e070a6d5e615e2 (opens in a new tab)
- https://git.kernel.org/stable/c/309c6058622d080fe8c2fab87c30da82d834d989 (opens in a new tab)
- https://git.kernel.org/stable/c/cb9e72c50e6c81a5903f27e0b397ce8525d7539b (opens in a new tab)
- https://git.kernel.org/stable/c/b9ff8631006233ba246828ac70409d2cb2da38d3 (opens in a new tab)
- https://git.kernel.org/stable/c/6d40f2f103bb30f52f3dbadbe2c3fdf274a9763c (opens in a new tab)
- https://git.kernel.org/stable/c/b52a8d52c3125ec9a93106ed816582368de34426 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45788 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64103)Record last updated .