Vulnerability in Linux Kernel
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Linux Kernel
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2021/07/06/3 (Mailing List, Third Party Advisory)
- github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75 (Patch, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14 (Patch, Mailing List, Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/07/06/3 (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210813-0004/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/10/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-35039?
- CVE-2021-35039 is a high-severity vulnerability in Linux Kernel, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2021-07-07.
- How severe is CVE-2021-35039?
- High severity. CVSS v3 base score is 7.8 out of 10.