Kernel: marvin vulnerability side-channel leakage in the rsa decryption operation
Priority MEDIUM 62CWE-203Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Partial Red Hat: 19 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-203.
Summary
A Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00969 62nd percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 19 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.0-553.5.1.rt7.346.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 4.18.0-553.5.1.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 5.14.0-427.16.1.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 5.14.0-427.16.1.el9_4 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — | 5.14.0-70.101.1.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — | 5.14.0-70.101.1.rt21.173.el9_0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 5.14.0-284.62.1.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | 5.14.0-284.62.1.rt14.347.el9_2 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.0-553.5.1.rt7.346.el8_10 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 4.18.0-553.5.1.el8_10 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-427.16.1.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 5.14.0-427.16.1.el9_4 Patch available CNA
- Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.101.1.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-70.101.1.rt21.173.el9_0 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-284.62.1.el9_2 Patch available CNA
- Red Hat Enterprise Linux 9.2 Extended Update Support VendorRed Hat Affected — Fixed in 5.14.0-284.62.1.rt14.347.el9_2 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Linux |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Linux
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
Remediation
Red Hat 7 advisories
- RHSA-2024:3627 Released 2024-06-05 · Red Hat rating Moderatekernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-4.18.0-553.5.1.rt7.346.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-core-4.18.0-553.5.1.rt7.346.el8_10, kernel-rt-debug-4.18.0-553.5.1.rt7.346.el8_10 +7
- RHSA-2024:3618 Released 2024-06-05 · Red Hat rating Moderatekernel update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.5.1.el8_10, kernel-4.18.0-553.5.1.el8_10, kernel-abi-stablelists-4.18.0-553.5.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.5.1.el8_10
- RHSA-2024:3421 Released 2024-05-28 · Red Hat rating Importantkernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.101.1.el9_0
- Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.101.1.el9_0, kernel-debug-devel-matched-5.14.0-70.101.1.el9_0, kernel-devel-5.14.0-70.101.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.101.1.el9_0, kernel-5.14.0-70.101.1.el9_0, kernel-abi-stablelists-5.14.0-70.101.1.el9_0 +14
Show 4 more Red Hat advisories
- RHSA-2024:3414 Released 2024-05-28 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-5.14.0-70.101.1.rt21.173.el9_0 +7
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-core-5.14.0-70.101.1.rt21.173.el9_0, kernel-rt-debug-5.14.0-70.101.1.rt21.173.el9_0 +9
- RHSA-2024:2758 Released 2024-05-08 · Red Hat rating Moderatekernel security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.16.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.16.1.el9_4, kernel-64k-devel-5.14.0-427.16.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.16.1.el9_4, kernel-5.14.0-427.16.1.el9_4, kernel-64k-5.14.0-427.16.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.16.1.el9_4, libperf-5.14.0-427.16.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.16.1.el9_4, kernel-rt-core-5.14.0-427.16.1.el9_4, kernel-rt-debug-5.14.0-427.16.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.16.1.el9_4, kernel-rt-core-5.14.0-427.16.1.el9_4, kernel-rt-debug-5.14.0-427.16.1.el9_4 +9
- RHSA-2024:1881 Released 2024-04-18 · Red Hat rating Moderatekernel security and bug fix update
- Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.62.1.el9_2
- Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.62.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.62.1.el9_2, kernel-64k-devel-5.14.0-284.62.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.62.1.el9_2, kernel-5.14.0-284.62.1.el9_2, kernel-64k-5.14.0-284.62.1.el9_2 +29
- RHSA-2024:1882 Released 2024-04-18 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.62.1.rt14.347.el9_2, kernel-rt-core-5.14.0-284.62.1.rt14.347.el9_2, kernel-rt-debug-5.14.0-284.62.1.rt14.347.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.62.1.rt14.347.el9_2, kernel-rt-core-5.14.0-284.62.1.rt14.347.el9_2, kernel-rt-debug-5.14.0-284.62.1.rt14.347.el9_2 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.0) | Fixed | RHSA-2024:3421 |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2024:1881 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:2758 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2024:3421 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:1881 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:3618 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:2758 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.0) | Fixed | RHSA-2024:3421 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:1881 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:3618 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:2758 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:3627 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:2758 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:3627 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:2758 |
| Red Hat Enterprise Linux Real Time EUS (v.9.0) | Fixed | RHSA-2024:3414 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2024:1882 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) | Fixed | RHSA-2024:3414 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2024:1882 |
Not affected: 1 product
- Red Hat Enterprise Linux AppStream EUS (v.9.2)
Timeline
- 2026-10-02 Threatist record created from CVE-2023-6240
- 2026-10-03 Alias added: GHSA-5gvr-285q-pwc3
References
Advisory 9
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Sources
- CVE-2023-6240 · CVE Program
- CVE-2023-6240 · NVD
- FIRST EPSS
- GHSA-5gvr-285q-pwc3 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-6240 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences