CVE-2020-29369: linux linux_kernel Race Condition
CVSS: 7.0v3.1HighModified
AliasesSUSE-SU-2020:3843-1UBUNTU-CVE-2020-29369DEBIAN-CVE-2020-29369
Published 28-11-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-29369 is a high (CVSS 7.0) Race Condition vulnerability in linux linux_kernel. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.0/10
010
High · v3.1 (NVD)EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 7 · Related 7Timeline
- 28-11-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.0Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Medium 6.9Preferred score · NVD (NIST)
AV:L/AC:M/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
0.00 pp
From 0.46% on 18-09-2026
18-09-202618-10-2026
EPSS score0.46%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Ubuntu32 products
- linux< 5.4.0-45.49
- linux-aws< 5.4.0-1022.22
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3All versions (No fix recorded)
- linux-aws-5.4< 5.4.0-1022.22~18.04.1
Netapp4 products
Debian1 product
- linux< 5.7.17-1
Linux1 product
- linux_kernel≥ 4.20, < 5.4.54 | ≥ 5.5, < 5.7.11
Suse1 product
- kernel-livepatch-SLE15-SP2_Update_0&distro=SUSE Linux Enterprise Live Patching 15 SP2< 6-5.2
5 vendors · 39 products
References
15 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11X Refsource MISCREPORTRelease NotesVendor Advisory
- bugs.chromium.org/p/project-zero/issues/detail?id=2056X Refsource MISCREPORTExploitIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/02/10/6Mailing ListX Refsource MLISTPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/02/19/8Mailing ListX Refsource MLISTPatchThird Party Advisory
