CVE-2020-29374: debian debian_linux
Vulnerability summary
CVE-2020-29374 is a low (CVSS 3.6) vulnerability in debian debian_linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.6% of scored vulnerabilities. 2 public exploits are recorded.
Not severe (CVSS 3.6, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 16 · Related 12Timeline
- 28-11-2020PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated3.6LowCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated3.6LowCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.41% 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 (bugs.chromium.org)
Maturity: unknown
Exploit Reference (packetstormsecurity.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-362Concurrent Execution using Shared Resource with Improper SynchronizationThe product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu46 products
- linuxAll versions (No fix recorded) | < 4.4.0-203.235 | < 4.15.0-136.140 | < 5.4.0-45.49
- linux-aws< 4.4.0-1086.90 | < 4.4.0-1122.136 | < 4.15.0-1094.101 | < 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
Netapp6 products
Debian2 products
- linux< 5.7.6-1
- debian_linuxEOL9.0 | 10.0
Linux1 product
- linux_kernel< 5.7.3
4 vendors · 55 products
References
16 links- bugs.chromium.org/p/project-zero/issues/detail?id=2045X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3X Refsource MISCREPORTRelease NotesThird Party AdvisoryVendor Advisory
- packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlX Refsource MISCExploitThird Party AdvisoryVDB Entry
lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListX Refsource MLISTThird Party Advisory
