CVE-2021-22555
Description
Important: kernel security, bug fix, and enhancement update
CISA KEV
- Vendor
- Linux
- Product
- Kernel
- Due date
- 2025-10-27
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2021-3057.html
Vendor advisory: cisa-kev — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21 ; https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d ; https://security.netapp.com/advisory/ntap-20210805-0010/ ; https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528 ; https://nvd.nist.gov/vuln/detail/CVE-2021-22555
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-22555
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:3057
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:3088
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-22555.html
Exploits
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.10.31-1 | |
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 5.10.38-1 |
| debian | bullseye | fixed | 5.10.38-1 |
| debian | forky | fixed | 5.10.38-1 |
| debian | sid | fixed | 5.10.38-1 |
| debian | trixie | fixed | 5.10.38-1 |
References
- https://www.suse.com/security/cve/CVE-2021-22555.html
- https://errata.rockylinux.org/RLSA-2021:3088
- https://errata.rockylinux.org/RLSA-2021:3057
- https://security-tracker.debian.org/tracker/CVE-2021-22555
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21 ; https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d ; https://security.netapp.com/advisory/ntap-20210805-0010/ ; https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528 ; https://nvd.nist.gov/vuln/detail/CVE-2021-22555
- https://errata.almalinux.org/8/ALSA-2021-3057.html
Verify integrity in audit chain (admin only). AS-IS.