In the Linux kernel, the following vulnerability has been resolved:
net: add more sanity checks to qdisc_pkt_len_init()
One path takes care of SKB_GSO_DODGY, assuming
skb->len is bigger than hdr_len.
virtio_net_hdr_to_skb() does not fully dissect TCP headers,
it only make sure it is at least 20 bytes.
It is possible for an user to provide a malicious 'GSO' packet,
total length of 80 bytes.
- 20 bytes of IPv4 header
- 60 bytes TCP header
- a small gso_size like 8
virtio_net_hdr_to_skb() would declare this packet as a normal
GSO packet, because it would see 40 bytes of payload,
bigger than gso_size.
We need to make detect this case to not underflow
qdisc_skb_cb(skb)->pkt_len.
Metrics
Affected Vendors & Products
References
History
Thu, 13 Feb 2025 00:45:00 +0000
Type | Values Removed | Values Added |
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Weaknesses | CWE-20 |
Fri, 20 Dec 2024 20:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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Tue, 12 Nov 2024 21:45:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Linux
Linux linux Kernel |
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Weaknesses | NVD-CWE-noinfo | |
CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:* |
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Vendors & Products |
Linux
Linux linux Kernel |
Fri, 08 Nov 2024 16:00:00 +0000
Type | Values Removed | Values Added |
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References |
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Wed, 23 Oct 2024 01:30:00 +0000
Type | Values Removed | Values Added |
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References |
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Metrics |
threat_severity
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cvssV3_1
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Mon, 21 Oct 2024 18:15:00 +0000
Type | Values Removed | Values Added |
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Description | In the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to qdisc_pkt_len_init() One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len. virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes. It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes. - 20 bytes of IPv4 header - 60 bytes TCP header - a small gso_size like 8 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size. We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len. | |
Title | net: add more sanity checks to qdisc_pkt_len_init() | |
References |
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Status: PUBLISHED
Assigner: Linux
Published: 2024-10-21T18:02:05.121Z
Updated: 2025-05-04T09:42:06.708Z
Reserved: 2024-10-21T12:17:06.045Z
Link: CVE-2024-49948

Updated: 2024-10-22T13:36:51.289Z

Status : Analyzed
Published: 2024-10-21T18:15:16.260
Modified: 2024-11-12T21:19:24.440
Link: CVE-2024-49948
