CVE-2021-35039: debian debian_linux
Vulnerability summary
CVE-2021-35039 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.7% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Related 9Timeline
- 07-07-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.25%
Chance of exploitation in the next 30 days
Percentile
17%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.25% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu11 products
- linux-aws-5.11< 5.11.0-1017.18~20.04.1
- linux-aws-fipsAll versions (No fix recorded) | < 5.4.0-1069.73+fips2
- linux-azure-5.11< 5.11.0-1015.16~20.04.1
- linux-azure-fipsAll versions (No fix recorded) | < 5.4.0-1073.76+fips1
- linux-fipsAll versions (No fix recorded) | < 5.4.0-1033.38
Debian2 products
- linux< 5.14.6-1
- debian_linuxEOL9.0
Linux1 product
- linux_kernel≥ 4.15, < 4.19.196 | ≥ 4.20, < 5.4.129 | ≥ 5.5, < 5.10.47 | ≥ 5.11, < 5.12.14
3 vendors · 14 products
References
12 links- github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75X Refsource CONFIRMPatchThird Party Advisory
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14X Refsource CONFIRMMailing ListPatchVendor Advisory
lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory
