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CVE-2026-89861
scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition()
Published 2026-09-16 (33 days ago) by the Linux kernel CNA. Subsystem drivers/scsi. Debian urgency: not yet assigned.
What to do, per Debian release
Debian's own status for CVE-2026-89861 in every release this site tracks, and what each one means in practice. Every status below is the one the Debian Security Team publishes for this CVE. source
| Release | Status | Version | What this means |
|---|---|---|---|
| Debian 12bookworm | fixedDLA-4841-1 · 2026-10-17 · text | 6.1.190-1 | Update the kernel and reboot. DLA-4841-1 shipped the fix on 2026-10-17, in 6.1.190-1. A running kernel keeps the old code until the machine restarts. |
| Debian 13trixie | fixedDSA-6528-1 · 2026-09-29 · text | 6.12.111-1 | Update the kernel and reboot. DSA-6528-1 shipped the fix on 2026-09-29, in 6.12.111-1. A running kernel keeps the old code until the machine restarts. |
| Debian 14forky | fixed | 7.2.6-1 | Update the kernel and reboot. Fixed in 7.2.6-1. A running kernel keeps the old code until the machine restarts. |
| Debian unstablesid | fixed | 7.2.6-1 | Update the kernel and reboot. Fixed in 7.2.6-1. A running kernel keeps the old code until the machine restarts. |
| Debian 12bookworm · linux-6.12 | fixedDLA-4817-1 · 2026-10-04 · text | 6.12.111-1~deb12u1 | Update the kernel and reboot. DLA-4817-1 shipped the fix on 2026-10-04, in 6.12.111-1~deb12u1. A running kernel keeps the old code until the machine restarts. |
The vulnerability
What the bug is
In the format 1 path, the virtual port is located on ha->vp_list while holding vport_slock, but the lock is dropped before vp is used: qla_update_host_map() is called and VP_IDX_ACQUIRED/REGISTER_FC4_NEEDED/ REGISTER_FDMI_NEEDED are set on vp. No reference is taken across that window, so a concurrent qla24xx_deallocate_vp_id() can tear the vport down and free it, leading to a use-after-free. Take a vport reference (vref_count) under vport_slock when the matching vp is found, and drop it after the last use of vp. qla24xx_deallocate_vp_id() waits for vref_count to reach zero before unlinking and freeing the vport, so the pointer stays valid. This matches the reference idiom already used by the other ha->vp_list traversals.
Where it lives
The fix touches these files. If the subsystem is one you do not use, the practical exposure is lower, though the package is still the vulnerable one.
drivers/scsi/qla2xxx/qla_mbx.c
- What this is
- QLOGIC QLA2XXX FC-SCSI DRIVERMAINTAINERS section matched on drivers/scsi/qla2xxx/ · linux-scsi@vger.kernel.org · Supported
- Kernel module
- qla2xxx
Check it on the machine
grep -w CONFIG_SCSI_QLA_FC /boot/config-$(uname -r)Reads the booted kernel's own configuration, on the machine and nowhere else. =y is built in, =m is a module, and an is not set line means the code is not there.
lsmod | grep -w qla2xxxPrints a line if that module is loaded right now, and nothing if it is not. One that is not loaded can still be loaded later by anything that needs it.
Show whether Debian builds this, per release
Debian builds this, but not on every flavour. At least one release below builds the code on some of its kernel flavours and not on others, so the answer depends on the architecture and flavour installed.
- bookwormMnot built on amd64/cloud-amd64, arm64/cloud-arm64, armhf/armmp, armhf/armmp-lpae, armhf/rt/armmp
- trixieMnot built on amd64/cloud-amd64, arm64/cloud-arm64, armel/rpi, armhf/armmp, armhf/armmp-lpae, armhf/rt/armmp, s390x/s390x
- forky, sidMnot built on amd64/cloud-amd64, arm64/cloud-arm64, armhf/armmp, armhf/armmp-lpae, s390x/s390x
- bookworm · linux-6.12Mnot built on amd64/cloud-amd64, arm64/cloud-arm64, armhf/armmp, armhf/armmp-lpae, armhf/rt/armmp
- M
- a module where it is built at all; some flavours do not build it
- Build switch
- CONFIG_SCSI_QLA_FC
From the configuration Debian publishes for every kernel flavour it builds. It covers only the architectures Debian ships a linux-config package for, and nothing about a kernel you built yourself. Debian's own status above stays authoritative about the source package.MAINTAINERS kbuild Makefiles Debian linux-config packages
Signals
- Published
- 2026-09-16 (33 days ago)source
- CVSS
- 8.1 high
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsource recompute it - Attack vector
- network (AV:N)source
- EPSS
- 0.57%, higher than 46.1% of all CVEssource
- CISA KEV
- not listedthe KEV catalogue
- Debian urgency
- not yet assignedsource
- Subsystem
- drivers/scsi
Upstream fixes
The versions the CNA records as introducing and fixing this, and the commit for each. source
| Introduced | Fixed in | Commit |
|---|---|---|
| 2.6.23 | 5.10.270 | d09ef32af1e0 |
| 2.6.23 | 5.15.221 | 4b7f0a95bfeb |
| 2.6.23 | 6.1.188 | 267533b28ddf |
| 2.6.23 | 6.6.157 | f8d2eb510c06 |
| 2.6.23 | 6.12.110 | f6b3bcc7cb2f |
| 2.6.23 | 6.18.51 | 47272152a13d |
| 2.6.23 | 7.2.5 | d556f899964d |
| 2.6.23 | 7.3 | 793cedee296f |
Debian advisories
| Advisory | Date | Shipped to | Debian |
|---|---|---|---|
| DLA-4841-1 | 2026-10-17 | bookworm 6.1.190-1 | tracker |
| DLA-4817-1 | 2026-10-04 | bookworm 6.12.111-1~deb12u1 | tracker |
| DSA-6528-1 | 2026-09-29 | trixie 6.12.111-1 | tracker |
Why the CNA scored it this way
Quoted from the kernel CNA's own scoring file, word for word. A highlighted metric carries the most severe value CVSS v3.1 defines for it, which is what pushes the score up. source
- AV:NAttack vector, network
- qla24xx_report_id_acquisition() runs from qla24xx_process_response_queue() and the ATIO MSI-X path on firmware VP_RPT_ID IOCBs after fabric FDISC or VP_STAT_ID_CHG. QLogic CNAs speak FCoE and SANs are stretched via FCIP, so a remote SAN peer drives this without a local syscall, matching sibling CVE-2026-89848.
- AC:HAttack complexity, high
- The use-after-free requires qla24xx_deallocate_vp_id() to unlink the vport and scsi_host_put() it after the ISR drops vport_slock, which occurs only during NPIV vport deletion or failed vport create, a victim state a fabric attacker cannot initiate.
- PR:NPrivileges required, none
- Report-ID IOCBs are firmware completions of unauthenticated Fibre Channel fabric login and N_Port ID assignment. The interrupt path performs no Linux credential or capability check, so a fabric peer needs no account on the victim host.
- UI:NUser interaction, none
- VP_RPT_ID handling runs automatically from the HBA interrupt and qla_do_work paths when the fabric assigns or changes an NPIV port ID. Concurrent vport teardown occurs during routine NPIV delete or driver remove, without a mount, open, or other interactive victim step.
- S:UScope, unchanged
- The use-after-free is of scsi_qla_host inside the host kernel qla2xxx driver and does not cross a VM, IOMMU, or other separate security-authority boundary.
- C:HConfidentiality impact, high
- After scsi_host_put() frees the vport, the ISR still calls qla_update_host_map() and set_bit() on the dangling scsi_qla_host. That kernel heap use-after-free enables disclosure of reused object contents.
- I:HIntegrity impact, high
- qla_update_host_map() writes the freed vport's d_id and inserts the dangling vha pointer into ha->host_map, and set_bit() writes vp_flags/dpc_flags on the freed object, yielding a kernel write and control-flow hijack primitive.
- A:HAvailability impact, high
- Use-after-free of scsi_qla_host from interrupt or qla_do_work context produces a kernel oops or panic even when not fully exploited, taking down storage served by the adapter.