CVE-2024-49948

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Source
https://cve.org/CVERecord?id=CVE-2024-49948
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49948.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-49948
Downstream
Related
Published
2024-10-21T18:02:05.121Z
Modified
2026-03-20T12:38:11.025475Z
Summary
net: add more sanity checks to qdisc_pkt_len_init()
Details

In the Linux kernel, the following vulnerability has been resolved:

net: add more sanity checks to qdiscpktlen_init()

One path takes care of SKBGSODODGY, assuming skb->len is bigger than hdr_len.

virtionethdrtoskb() 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

virtionethdrtoskb() 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 qdiscskbcb(skb)->pkt_len.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49948.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1def9238d4aa2146924994aa4b7dc861f03b9362
Fixed
d7d1a28f5dd57b4d83def876f8d7b4403bd37df9
Fixed
473426a1d53a68dd1e718e6cd00d57936993fa6c
Fixed
566a931a1436d0e0ad13708ea55479b95426213c
Fixed
2415f465730e48b6e38da1c7c097317bf5dd2d20
Fixed
27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4
Fixed
9b0ee571d20a238a22722126abdfde61f1b2bdd0
Fixed
ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2
Fixed
1eebe602a8d8264a12e35e39d0645fa88dbbacdd
Fixed
ab9a9a9e9647392a19e7a885b08000e89c86b535

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49948.json"