CVE-2024-45016
Sept. 13, 2024, 4:36 p.m.
Tags
CVSS Score
Products Impacted
Vendor | Product | Versions |
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linux |
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Description
In the Linux kernel, the following vulnerability has been resolved: netem: fix return value if duplicate enqueue fails There is a bug in netem_enqueue() introduced by commit 5845f706388a ("net: netem: fix skb length BUG_ON in __skb_to_sgvec") that can lead to a use-after-free. This commit made netem_enqueue() always return NET_XMIT_SUCCESS when a packet is duplicated, which can cause the parent qdisc's q.qlen to be mistakenly incremented. When this happens qlen_notify() may be skipped on the parent during destruction, leaving a dangling pointer for some classful qdiscs like DRR. There are two ways for the bug happen: - If the duplicated packet is dropped by rootq->enqueue() and then the original packet is also dropped. - If rootq->enqueue() sends the duplicated packet to a different qdisc and the original packet is dropped. In both cases NET_XMIT_SUCCESS is returned even though no packets are enqueued at the netem qdisc. The fix is to defer the enqueue of the duplicate packet until after the original packet has been guaranteed to return NET_XMIT_SUCCESS.
Weaknesses
CWE-416
Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CWE ID: 416Date
Published: Sept. 11, 2024, 4:15 p.m.
Last Modified: Sept. 13, 2024, 4:36 p.m.
Status : Analyzed
CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.
More infoSource
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CPEs
Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
---|---|---|---|---|---|---|---|---|---|---|
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | / | / | / | / | / | / | / | / |
o | linux | linux_kernel | 6.11 | rc1 | / | / | / | / | / | / |
o | linux | linux_kernel | 6.11 | rc2 | / | / | / | / | / | / |
o | linux | linux_kernel | 6.11 | rc3 | / | / | / | / | / | / |
o | linux | linux_kernel | 6.11 | rc4 | / | / | / | / | / | / |
CVSS Data
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Base Score
Exploitability Score
Impact Score
Base Severity
MEDIUMCVSS Vector String
The CVSS vector string provides an in-depth view of the vulnerability metrics.
View Vector StringCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H