CVE-2022-43945
Description
The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | 5.19.17 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
AlmaLinux Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | kernel-debug-devel-5.14.0-162.12.1.el9_1.aarch64.rpm |
| 8 | Fixed | kernel-rt-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 6.2-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.0.3-1 |
| sid | Fixed | 6.0.3-1 |
| forky | Fixed | 6.0.3-1 |
| bullseye | Fixed | 5.10.221-1 |
| bookworm | Fixed | 6.0.3-1 |
Red Hat Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Rocky Linux Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| netapp | active_iq_unified_manager | - | |
References
- https://access.redhat.com/errata/RHSA-2023:0300
- https://access.redhat.com/errata/RHSA-2023:0334
- https://access.redhat.com/errata/RHSA-2023:0348
- http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8
- https://security.netapp.com/advisory/ntap-20221215-0006/
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://errata.rockylinux.org/RXSA-2023:0832
- https://errata.rockylinux.org/RLSA-2023:0854
- https://errata.rockylinux.org/RLSA-2023:0832
- https://www.suse.com/security/cve/CVE-2022-43945.html
- https://security-tracker.debian.org/tracker/CVE-2022-43945
- https://errata.rockylinux.org/RLSA-2023:0334
- https://errata.rockylinux.org/RXSA-2023:0334
- https://errata.rockylinux.org/RLSA-2023:0300
- https://access.redhat.com/errata/RHSA-2023:0832
- https://bugzilla.redhat.com/2119048
- https://bugzilla.redhat.com/2138818
- https://bugzilla.redhat.com/2141752
- https://errata.almalinux.org/8/ALSA-2023-0832.html
- https://access.redhat.com/errata/RHSA-2023:0854
- https://errata.almalinux.org/8/ALSA-2023-0854.html
- https://bugzilla.redhat.com/2067482
- https://bugzilla.redhat.com/2085300
- https://bugzilla.redhat.com/2103681
CWEs
CWE-131 CWE-770
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.