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8.4 High

CVE-2026-53091 In the Linux kernel, the following vulnerability has been resolved: net: pull headers in qdisc_pkt_len_segs_init()…

Description

In the Linux kernel, the following vulnerability has been resolved: net: pull headers in qdisc_pkt_len_segs_init() Most ndo_start_xmit() methods expects headers of gso packets to be already in skb->head. net/core/tso.c users are particularly at risk, because tso_build_hdr() does a memcpy(hdr, skb->data, hdr_len); qdisc_pkt_len_segs_init() already does a dissection of gso packets. Use pskb_may_pull() instead of skb_header_pointer() to make sure drivers do not have to reimplement this. Some malicious packets could be fed, detect them so that we can drop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason.

Affected products and versions

Product Affected versions Fixed in
Linux 7.1 earliest → < 7.1 7.1
Linux 7.0 earliest → < 7.0.10 7.0.10
Linux 6.12 earliest → < 6.12.114 6.12.114
Linux 6.6 earliest → < 6.6.160 6.6.160
Linux 3.16 No fix stated
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
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Product Affected versions Fixed in
Red Hat Enterprise Linux 6 Versions not published

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