CVE-2019-3896: linux linux_kernel Use After Free
CVSS: 7.8v3.0HighModified
AliasesUBUNTU-CVE-2019-3896DEBIAN-CVE-2019-3896
Published 18-06-2019Last modified 04-08-2024
Vulnerability summary
CVE-2019-3896 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.5% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.0 (NVD)EPSS score
0.42%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 4 · Related 1Timeline
- 18-06-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSources4 sources · 7.0–7.8
- CVE.orgCNA7.0HighCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
High 7.2Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
0.00 pp
From 0.42% on 19-09-2026
19-09-202619-10-2026
EPSS score0.42%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
- CWE-415Double FreeThe product calls free() twice on the same memory address.
Affected systems
Redhat4 products
Ubuntu4 products
- linuxAll versions (No fix recorded)
- linux-awsAll versions (No fix recorded)
- linux-azureAll versions (No fix recorded)
- linux-lts-xenialAll versions (No fix recorded)
Debian1 product
- linux< 3.2.41-1
Linux1 product
- linux_kernel≥ 2.6.0, ≤ 2.6.39.4
The linux foundation1 product
- kernel2.6.32
5 vendors · 11 products
References
7 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3896X Refsource CONFIRMIssue TrackingThird Party Advisory
- support.f5.com/csp/article/K04327111X Refsource CONFIRM
- security.netapp.com/advisory/ntap-20190710-0002/X Refsource CONFIRM
