CVE-2021-35039
HIGHCVSS 7.8/10EPSS 0.25%
Last modified
CVE-2021-35039 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.
Description
kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.15, < 4.19.196 |
| Linux | Linux Kernel | >= 4.20, < 5.4.129 |
| Linux | Linux Kernel | >= 5.5, < 5.10.47 |
| Linux | Linux Kernel | >= 5.11, < 5.12.14 |
| Debian | Debian Linux | 9.0 |
References
- http://www.openwall.com/lists/oss-security/2021/07/06/3Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c18f29aae7ce3dadd26d8ee3505d07cc982df75Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210813-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/07/06/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/06/3Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c18f29aae7ce3dadd26d8ee3505d07cc982df75Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210813-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/07/06/3Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-35039?
kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.
How severe is CVE-2021-35039?
CVE-2021-35039 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2021-35039?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
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Are you affected by CVE-2021-35039?
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Scan your code nowSource: NVD / NIST