Vulnerability · Published Nov 2, 2021 · Assigned by mitre
CVE-2021-43267
Critical 9.8
In plain English
A critical-severity security flaw in the kernel-tools-libs-devel package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 57.9% (higher than 99.1% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)57.9%top 0.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official description
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-348.2.1.el8_5 | ALSA-2021:4647 |
| Debian:12 | linux | 5.14.16-1 | DEBIAN-CVE-2021-43267 |
| Debian:13 | linux | 5.14.16-1 | DEBIAN-CVE-2021-43267 |
| Debian:14 | linux | 5.14.16-1 | DEBIAN-CVE-2021-43267 |
| Rocky Linux:8 | kernel | 0:4.18.0-348.2.1.el8_5 | RLSA-2021:4647 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-348.2.1.rt7.132.el8_5 | RLSA-2021:4646 |
Affected products (as reported)
References
- https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0 x_refsource_MISC
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16 x_refsource_MISC
- FEDORA-2021-a093973910 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-bdd146e463 vendor-advisory, x_refsource_FEDORA
- https://security.netapp.com/advisory/ntap-20211125-0002/ x_refsource_CONFIRM
- [oss-security] 20220210 CVE-2022-0435: Remote Stack Overflow in Linux Kernel TIPC Module since 4.8 (net/tipc) mailing-list, x_refsource_MLIST