CVE-2021-27364: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2021-27364 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.7% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 49 · Related 26Timeline
- 07-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.
CVSS metrics
4 scores · 3 sources · 2 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
0.97%
Chance of exploitation in the next 30 days
Percentile
62%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.97% 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
1 foundExploit Reference (blog.grimm-co.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.
Ubuntu51 products
- linux< 3.13.0-185.236 | < 4.4.0-206.238 | < 4.15.0-139.143 | < 5.4.0-70.78
- linux-aws< 4.4.0-1088.92 | < 4.4.0-1124.138 | < 4.15.0-1096.103 | < 5.4.0-1041.43
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3All versions (No fix recorded)
- linux-aws-5.4< 5.4.0-1041.43~18.04.1
Debian2 products
- linux< 5.10.24-1
- debian_linuxEOL9.0
Netapp2 products
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 20.04
Linux1 product
- linux_kernel< 4.4.260 | ≥ 4.5, < 4.9.260 | ≥ 4.10, < 4.14.224 | ≥ 4.15, < 4.19.179 | ≥ 4.20, < 5.4.103 | ≥ 5.5, < 5.10.21 | ≥ 5.11, < 5.11.4
Oracle1 product
- tekelec_platform_distribution≥ 7.4.0, ≤ 7.7.1
6 vendors · 58 products
References
19 links
lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlMailing ListX Refsource MLISTThird Party Advisory
- www.openwall.com/lists/oss-security/2021/03/06/1X Refsource MISCREPORTMailing ListThird Party Advisory
- blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlX Refsource MISCExploitThird Party Advisory
- packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlX Refsource MISCThird Party AdvisoryVDB Entry
