CVE-2021-3743: fedoraproject fedora Out-of-bounds Read
Vulnerability summary
CVE-2021-3743 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in fedoraproject fedora. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.9% of scored vulnerabilities. 2 public exploits are recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 20Timeline
- 04-03-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An out-of-bounds (OOB) memory read flaw was found in the Qualcomm IPC router protocol in the Linux kernel. A missing sanity check allows a local attacker to gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.72%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.72% 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
2 foundExploit Reference (lists.openwall.net)
Maturity: unknown
Exploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu63 products
- linuxAll versions (No fix recorded) | < 4.15.0-162.170 | < 5.4.0-90.101
- linux-awsAll versions (No fix recorded) | < 4.15.0-1115.122 | < 5.4.0-1059.62
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11< 5.11.0-1020.21~20.04.2
- linux-aws-5.3All versions (No fix recorded)
Oracle3 products
Debian1 product
- linux< 5.14.6-1
Fedoraproject1 product
- fedoraEOL34
Linux1 product
- linux_kernelEOL> 5.14.1, < 5.17 | 5.14:rc6 | 5.17 | 5.17:rc1 | 5.17:rc2 | 5.17:rc3 | 5.17:rc4 | 5.17:rc5 | 5.17:rc6
6 vendors · 77 products
References
20 links- www.openwall.com/lists/oss-security/2021/08/27/2X Refsource MISCREPORTExploitMailing ListPatchThird Party Advisory
- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e78c597c3ebX Refsource MISCPatchVendor Advisory
- github.com/torvalds/linux/commit/7e78c597c3ebfd0cb329aa09a838734147e4f117X Refsource MISCPatchThird Party Advisory
- git.kernel.org/pub/…REPORT
Show all 20 references
- git.kernel.org/pub/…REPORT
