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CVE-2022-3643

MEDIUM
6.5
CVSS Score
Published: December 7, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:59 AM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux· also runs on 1 platform

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%

Description

Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol headers are all contained within the linear section of the SKB and some NICs behave badly if this is not the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x) though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with split headers, netback will forward those violating above mentioned assumption to the networking core, resulting in said misbehavior.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Linux Kernel· Linux
95%
3.19 ≤ v < 4.9.3364.10 ≤ v < 4.14.3024.15 ≤ v < 4.19.2694.20 ≤ v < 5.4.2275.11 ≤ v < 5.15.835.16 ≤ v < 6.0.135.5 ≤ v < 5.10.159
Affected range stops below 4.14.302, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.269, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.336, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.159, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.83, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.227, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.0.13, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in consult Xen advisory XSA-423 (unknown)
broadcom-bcm5780 (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

Source: [email protected]
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2022/12/07/2
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html
Vendor Advisory
Source: [email protected]
https://xenbits.xenproject.org/xsa/advisory-423.txt

CVSS

6.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-74

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