Strix
26.1K

CVE-2022-49921

HIGHCVSS 7.8/10EPSS 0.15%

Last modified

CVE-2022-49921 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.15%

4.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
LinuxLinux Kernel>= 4.4.163, < 4.5—
LinuxLinux Kernel>= 4.7, < 4.9.333—
LinuxLinux Kernel>= 4.10, < 4.14.299—
LinuxLinux Kernel>= 4.15, < 4.19.265—
LinuxLinux Kernel>= 4.20, < 5.4.224—
LinuxLinux Kernel>= 5.5, < 5.10.154—
LinuxLinux Kernel>= 5.11, < 5.15.78—
LinuxLinux Kernel>= 5.16, < 6.0.8—
LinuxLinux Kernel6.1Rc1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-49921?
In the Linux kernel, the following vulnerability has been resolved: net: sched: Fix use after free in red_enqueue() We can't use "skb" again after passing it to qdisc_enqueue(). This is basically identical to commit 2f09707d0c97 ("sch_sfb: Also store skb len before calling child enqueue").
How severe is CVE-2022-49921?
CVE-2022-49921 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2022-49921?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-49921?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST