# CVE-2024-49978: gso: fix udp gso fraglist segmentation after pull from frag_list CVE-2024-49978 is fixed in 47 products on 1 platform, first by DEBIAN-CVE-2024-49978, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2024-49978 - Priority: Routine - CVSS: 5.5 (Moderate) - EPSS: 0.0066 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 21, 2024 - Weakness: NULL Pointer Dereference - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49978 ## Description In the Linux kernel, the following vulnerability has been resolved: gso: fix udp gso fraglist segmentation after pull from frag_list Detect gso fraglist skbs with corrupted geometry (see below) and pass these to skb_segment instead of skb_segment_list, as the first can segment them correctly. Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants. In extreme cases they pull all data into skb linear. For UDP, this causes a NULL ptr deref in __udpv4_gso_segment_list_csum at udp_hdr(seg->next)->dest. Detect invalid geometry due to pull, by checking head_skb size. Don't just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-coco sles 15.6 | 6.4.0-15061.15.coco15sp6.1 | [SUSE-SU-2025:0564-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0564-1.md) | Feb 17, 2025 | | Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.15.coco15sp6.1 | [SUSE-SU-2025:0564-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0564-1.md) | Feb 17, 2025 | | Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-debuginfo amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-default sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.38.1.150600.12.16.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.38.1.150600.12.16.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-devel amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-headers amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-libbpf amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-livepatch-6.1.115-126.197 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-livepatch-SLE15-SP6-RT_Update_8 sles 15.6 | 1-150600.1.3.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 | | Linux | kernel-livepatch-SLE15-SP6_Update_8 sles 15.6 | 1-150600.13.3.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-modules-extra amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-modules-extra-common amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 | | Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 | | Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-source sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.15.coco15sp6.1 | [SUSE-SU-2025:0564-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0564-1.md) | Feb 17, 2025 | | Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 | | Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 | | Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.15.coco15sp6.1 | [SUSE-SU-2025:0564-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0564-1.md) | Feb 17, 2025 | | Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 | | Linux | kernel-tools amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-tools-devel amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 | | Linux | linux Debian 12.15 (bookworm) | 6.1.115-1 | [DEBIAN-CVE-2024-49978](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49978.md) | Oct 21, 2024 | | Linux | linux Debian 13.5 (trixie) | 6.11.4-1 | [DEBIAN-CVE-2024-49978](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49978.md) | Oct 21, 2024 | | Linux | linux Debian 14 | 6.11.4-1 | [DEBIAN-CVE-2024-49978](https://patchblox.com/security/data/fix/linux/debian-cve-2024-49978.md) | Oct 21, 2024 | | Linux | perf amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | perf-debuginfo amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | python3-perf amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.115-126.197.amzn2023 | [ALAS2023-2025-794](https://patchblox.com/security/data/fix/linux/alas2023-2025-794.md) | Jan 6, 2025 | --- Data as of 2026-11-09T01:18:40Z UTC. 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