btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots()
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 1 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix root leak if its reloc root is unexpected in merge_reloc_roots() If we have an unexpected reloc_root for our root, we jump to the out label but never drop the reference we obtained for root, resulting in a leak. Add a missing btrfs_put_root() call.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00215 11th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.216, 6.1.183, 6.6.148 +4Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
Not affected: 7 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux for NVIDIA 26
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-68422
- 2026-10-03 Alias added: GHSA-v7mh-g6gq-fvrq
- 2026-11-06 CISA SSVC decision points changed
- 2026-11-07 Affected versions changed · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/f89df93e8aefa4c1c813f835559f2ac727f79766
- https://git.kernel.org/stable/c/3f586b4c92e4272fcd01bf0db0590b63acf3e85b
- https://git.kernel.org/stable/c/b3d39b03799600c76c33486e2d29b73a771023db
- https://git.kernel.org/stable/c/72f673d1c1deb819554d3e7e154f6d84301eb735
- https://git.kernel.org/stable/c/60a23d4ea169e27403f3bb023bb98036797c0206
- https://git.kernel.org/stable/c/7591d1727067d6063247901ad25c4bdc4e5695c4
- https://git.kernel.org/stable/c/ce6050bafb4e33377dc17fcc357736bfc351180c
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- TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2026-68422 · CVE Program
- CVE-2026-68422 · NVD
- FIRST EPSS
- GHSA-v7mh-g6gq-fvrq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-68422 · Red Hat security data · CC BY 4.0
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