apparmor: fix reference count leak in aa_pivotroot()
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix reference count leak in aa_pivotroot() The aa_pivotroot() function has a reference counting bug in a specific path. When aa_replace_current_label() returns on success, the function forgets to decrement the reference count of “target”, which is increased earlier by build_pivotroot(), causing a reference leak. Fix it by decreasing the refcount of “target” in that path.
Why it matters now
EPSS 0.00194 9th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.14.291, 4.19.256, 5.4.211 +4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.14 and later | 4.14.291, 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0 | Patch available | CNA |
- Linux VendorLinux Affected 4.14 and later Fixed in 4.14.291, 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0 Patch available CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.14.1 to before 4.14.291; 4.15 to before 4.19.256; 4.20 to before 5.4.211; 5.5 to before 5.10.138; 5.11 to before 5.15.63; 5.16 to before 5.19.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:-:*:*:*:*:*:* | 4.14 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc2:*:*:*:*:*:* | 4.14 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc3:*:*:*:*:*:* | 4.14 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc4:*:*:*:*:*:* | 4.14 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc5:*:*:*:*:*:* | 4.14 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc6:*:*:*:*:*:* | 4.14 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc7:*:*:*:*:*:* | 4.14 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:4.14:rc8:*:*:*:*:*:* | 4.14 rc8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14.1 to before 4.14.291; 4.15 to before 4.19.256; 4.20 to before 5.4.211; 5.5 to before 5.10.138; 5.11 to before 5.15.63; 5.16 to before 5.19.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:-:*:*:*:*:*:* Versions 4.14 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc2:*:*:*:*:*:* Versions 4.14 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc3:*:*:*:*:*:* Versions 4.14 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc4:*:*:*:*:*:* Versions 4.14 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc5:*:*:*:*:*:* Versions 4.14 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc6:*:*:*:*:*:* Versions 4.14 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc7:*:*:*:*:*:* Versions 4.14 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:4.14:rc8:*:*:*:*:*:* Versions 4.14 rc8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.291, 4.19.256, 5.4.211, 5.10.138, 5.15.63, 5.19.4, 6.0
Vendor assessments
Red Hat
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2022-50077
- 2026-10-03 Alias added: GHSA-6q7v-49c4-hj5m
References
Patch 7
- https://git.kernel.org/stable/c/d53194707d2a1851be027cd74266b96ceff799d3
- https://git.kernel.org/stable/c/f4d5c7796571624e3f380b447ada52834270a287
- https://git.kernel.org/stable/c/ef6fb6f0d0d8440595b45a7e53c6162c737177f4
- https://git.kernel.org/stable/c/2ceeb3296e9dde1d5772348046affcefdea605e2
- https://git.kernel.org/stable/c/64103ea357734b82384c925cba4758fdb909be0c
- https://git.kernel.org/stable/c/3ca40ad7afae144169a43988ef1a3f16182faf0a
- https://git.kernel.org/stable/c/11c3627ec6b56c1525013f336f41b79a983b4d46
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- 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
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-50077 · CVE Program
- CVE-2022-50077 · NVD
- FIRST EPSS
- GHSA-6q7v-49c4-hj5m · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50077 · Red Hat security data · CC BY 4.0
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