CVE-2022-1516: debian debian_linux Use After Free
Vulnerability summary
CVE-2022-1516 is a medium (CVSS 5.5) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 27% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 25 · Related 22Timeline
- 05-05-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
A NULL pointer dereference flaw was found in the Linux kernel’s X.25 set of standardized network protocols functionality in the way a user terminates their session using a simulated Ethernet card and continued usage of this connection. This flaw allows a local user to crash the system.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.34% 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
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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-476NULL Pointer DereferenceThe product dereferences a pointer that it expects to be valid but is NULL.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu76 products
- linux< 4.4.0-239.273 | < 4.15.0-189.200 | < 5.4.0-117.132 | < 5.15.0-37.39
- linux-aws< 4.4.0-1117.123 | < 4.4.0-1155.170 | < 4.15.0-1137.148 | < 5.4.0-1078.84 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13All versions (No fix recorded)
Debian2 products
- linux< 5.17.3-1
- debian_linuxEOL9.0 | 10.0
Linux1 product
- linux_kernel5.18:rc1
3 vendors · 79 products
References
15 links- git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7781607938c8X Refsource MISCMailing ListPatchVendor Advisory
lists.debian.org/debian-lts-announce/2022/07/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory