CVE-2022-49234

Linux kernel: out-of-bounds read can lead to denial of service

Risk score: 61/100
CVSS: 7.1 v3.1
Exploit chance (30 days): 0.2%
Published: 26 Feb 2025

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What to know

What it is: In the Linux kernel, the following vulnerability has been resolved: net: dsa: Avoid cross-chip syncing of VLAN filtering Changes to VLAN filtering are not applicable to cross-chip notifications. On a system like this: .-----. .-----. .-----. '-1-2-' '-1-2-' '-1-2-' Before this change, upon sw1p1 leaving a bridge, a ca…
Affected: Linux kernel
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Story map

Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Linux kernel: Amber, patch this week. In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: restore network header before routing and forwarding ipv6_srh_rcv() runs with skb->data at the Segment Routing Header (SRH) while skb_network_header() points at the IPv6 header. When segments_left > 0, ipv6_srh_rcv() previously restored the …

The flaws

CVE-2022-49234: Out-of-bounds read can lead to denial of service (CVSS 7.1 · EPSS 0%)
CVE-2026-98096: Out-of-bounds write (CVSS 7.4 · EPSS 1%)
CVE-2026-98115: Race condition (CVSS 8.8 · EPSS 0%)
CVE-2026-98117: Use-after-free (CVSS 7.8 · EPSS 0%)

The fix

Fix: Apply the vendor's security update; see the linked advisory.

Who is exposed: Linux kernel

Where it stands

No known exploitation

How it unfolded

3 Nov, Ubuntu security notices (official): USN-8962-1: Linux kernel (Azure CVM) vulnerabilities
3 Nov, Ubuntu security notices (official): USN-8963-1: Linux kernel (NVIDIA Tegra) vulnerabilities
3 Nov, Ubuntu security notices (official): USN-8961-1: Linux kernel vulnerabilities

Connects to

Same weakness: Out-of-bounds read (CWE-125). 399 other warnings in 30 days
Same product: Earlier Linux kernel warnings. 105 in the last 90 days

Why it is Amber

CVSS 7.1 high
On your watchlist: linux kernel
Named in a government or vendor bulletin

Government and vendor bulletins

References

Original description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: Avoid cross-chip syncing of VLAN filtering Changes to VLAN filtering are not applicable to cross-chip notifications. On a system like this: .-----. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-' '-1-2-' '-1-2-' Before this change, upon sw1p1 leaving a bridge, a call to dsa_port_vlan_filtering would also be made to sw2p1 and sw3p1. In this scenario: .---------. .-----. .-----. | sw1 +---+ sw2 +---+ sw3 | '-1-2-3-4-' '-1-2-' '-1-2-' When sw1p4 would leave a bridge, dsa_port_vlan_filtering would be called for sw2 and sw3 with a non-existing port - leading to array out-of-bounds accesses and crashes on mv88e6xxx.

Last activity 3 Nov 2026. Patch Forecast updates every hour.