x86/entry_32: Clear CPU buffers after register restore in NMI return
Priority LOW 31Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/entry_32: Clear CPU buffers after register restore in NMI return CPU buffers are currently cleared after call to exc_nmi, but before register state is restored. This may be okay for MDS mitigation but not for RDFS. Because RDFS mitigation requires CPU buffers to be cleared when registers don't have any sensitive data. Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00215 11th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.228, 5.15.169, 6.1.114 +4
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 | 5.10.215 to before 5.10.228; 5.15.154 to before 5.15.169; 6.1.81 to before 6.1.114; 6.6.21 to before 6.6.58; 6.7.9 to before 6.8 | 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.8 | Patch available | CNA |
| Linux | Linux | 6.8 and later | 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.11.5, 6.12 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.215 to before 5.10.228; 5.15.154 to before 5.15.169; 6.1.81 to before 6.1.114; 6.6.21 to before 6.6.58; 6.7.9 to before 6.8 Fixed in 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.8 Patch available CNA
- Linux VendorLinux Affected 6.8 and later Fixed in 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.11.5, 6.12 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 5.10.228; 5.11 to before 5.15.169; 5.16 to before 6.1.114; 6.2 to before 6.6.58; 6.8 to before 6.11.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* | 6.12 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:* | 6.12 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:* | 6.12 rc3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.10.228; 5.11 to before 5.15.169; 5.16 to before 6.1.114; 6.2 to before 6.6.58; 6.8 to before 6.11.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* Versions 6.12 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:* Versions 6.12 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:* Versions 6.12 rc3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.8
- Fix · CNA Linux (Linux) Fixed in 5.10.228, 5.15.169, 6.1.114, 6.6.58, 6.11.5, 6.12
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 4 products
- 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-2024-50193
- 2026-10-03 Alias added: GHSA-vw34-j5vp-r98r
References
Patch 6
- https://git.kernel.org/stable/c/6f44a5fc15b5cece0785bc07453db77d99b0a6de
- https://git.kernel.org/stable/c/b6400eb0b347821efc57760221f8fb6d63b9548a
- https://git.kernel.org/stable/c/43778de19d2ef129636815274644b9c16e78c66b
- https://git.kernel.org/stable/c/227358e89703c344008119be7e8ffa3fdb5b92de
- https://git.kernel.org/stable/c/64adf22c4bc73ede920baca5defefb70f190cdbc
- https://git.kernel.org/stable/c/48a2440d0f20c826b884e04377ccc1e4696c84e9
More Linux Kernel vulnerabilities
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- 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-2024-50193 · CVE Program
- CVE-2024-50193 · NVD
- FIRST EPSS
- GHSA-vw34-j5vp-r98r · GitHub Advisory Database · CC BY 4.0
- CVE-2024-50193 · Red Hat security data · CC BY 4.0
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