CVE-2024-49948Medium· 5.5▾ SunlitIn 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 f…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
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.
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.
linux_kernel >= 3.9, < 4.19.323linux_kernel >= 4.20, < 5.4.285linux_kernel >= 5.5, < 5.10.227linux_kernel >= 5.11, < 5.15.168linux_kernel >= 5.16, < 6.1.113linux_kernel >= 6.2, < 6.6.55linux_kernel >= 6.7, < 6.10.14linux_kernel >= 6.11, < 6.11.3linux_kernel = 6.12Upgrade past the affected range:
linux_kernel 6.11.3Connected by shared product, vendor, weakness, or advisory.
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