fbdev: fbcon: release buffer when fbcon_do_set_font() failed
Priority LOW 24CWE-401Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-401.
Summary
In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: release buffer when fbcon_do_set_font() failed syzbot is reporting memory leak at fbcon_do_set_font() [1], for commit a5a923038d70 ("fbdev: fbcon: Properly revert changes when vc_resize() failed") missed that the buffer might be newly allocated by fbcon_set_font().
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00163 5th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.86, 5.20, 6.0.16 +2
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15.64 to before 5.15.86; 5.19.6 to before 5.20 | 5.15.86, 5.20 | Patch available | CNA |
| Linux | Linux | 6.0 and later | 5.15.86, 6.0.16, 6.1.2, 6.2 | Patch available | CNA |
- Linux VendorLinux Affected 5.15.64 to before 5.15.86; 5.19.6 to before 5.20 Fixed in 5.15.86, 5.20 Patch available CNA
- Linux VendorLinux Affected 6.0 and later Fixed in 5.15.86, 6.0.16, 6.1.2, 6.2 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.64 to before 5.15.86; 5.19.6 to before 6.0; 6.0.1 to before 6.0.16; 6.1 to before 6.1.2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:-:*:*:*:*:*:* | 6.0 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:* | 6.0 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:* | 6.0 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:rc5:*:*:*:*:*:* | 6.0 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:rc6:*:*:*:*:*:* | 6.0 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.0:rc7:*:*:*:*:*:* | 6.0 rc7 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.64 to before 5.15.86; 5.19.6 to before 6.0; 6.0.1 to before 6.0.16; 6.1 to before 6.1.2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:-:*:*:*:*:*:* Versions 6.0 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:* Versions 6.0 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:* Versions 6.0 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:rc5:*:*:*:*:*:* Versions 6.0 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:rc6:*:*:*:*:*:* Versions 6.0 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.0:rc7:*:*:*:*:*:* Versions 6.0 rc7 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.86, 5.20
- Fix · CNA Linux (Linux) Fixed in 5.15.86, 6.0.16, 6.1.2, 6.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
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-2022-50404
- 2026-10-03 Alias added: GHSA-mj94-g7gv-r97m
References
Patch 5
- https://git.kernel.org/stable/c/5a341810a22e51c3a7a108f7896b5fd58d44d127
- https://git.kernel.org/stable/c/88ec6d11052da527eb9268831e7a9bc5bbad02f6
- https://git.kernel.org/stable/c/06926607b9fddf7ce8017493899ce6eb7e79a123
- https://git.kernel.org/stable/c/a609bfc1e644a8467cb31945ed1488374ebdc013
- https://git.kernel.org/stable/c/3c3bfb8586f848317ceba5d777e11204ba3e5758
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable 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
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-50404 · CVE Program
- CVE-2022-50404 · NVD
- FIRST EPSS
- GHSA-mj94-g7gv-r97m · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50404 · Red Hat security data · CC BY 4.0
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