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CVE-2024-49948 In the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to…

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.

Affected products and versions

Product	Affected versions	Fixed in
Linux 6.12	earliest → < 6.12	6.12
Linux 6.11	earliest → < 6.11.3	6.11.3
Linux 6.10	earliest → < 6.10.14	6.10.14
Linux 6.6	earliest → < 6.6.55	6.6.55
Linux 6.1	earliest → < 6.1.113	6.1.113
Linux 5.15	earliest → < 5.15.168	5.15.168
Linux 5.10	earliest → < 5.10.227	5.10.227
Linux 5.4	earliest → < 5.4.285	5.4.285
Linux 4.19	earliest → < 4.19.323	4.19.323

Show the 8 other branches

Product	Affected versions	Fixed in
Linux	3.9	No fix stated
RUGGEDCOM RST2428P 3.2	earliest → < 3.2	3.2
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family 3.2	earliest → < 3.2	3.2
SCALANCE XCM-/XRM-/XCH-/XRH-300 family 3.2	earliest → < 3.2	3.2
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1	earliest → < 1.1.1	1.1.1
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.0 → < 3.1.5	3.1.5