213 lines
11 KiB
JSON
213 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-49979",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-10-21T12:17:06.052Z",
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"datePublished": "2024-10-21T18:02:25.819Z",
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"dateUpdated": "2026-08-05T11:40:49.381Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:40:49.381Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gso: fix tcp fraglist segmentation after pull from frag_list\n\nDetect tcp gso fraglist skbs with corrupted geometry (see below) and\npass these to skb_segment instead of skb_segment_list, as the first\ncan segment them correctly.\n\nValid SKB_GSO_FRAGLIST skbs\n- consist of two or more segments\n- the head_skb holds the protocol headers plus first gso_size\n- one or more frag_list skbs hold exactly one segment\n- all but the last must be gso_size\n\nOptional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can\nmodify these skbs, breaking these invariants.\n\nIn extreme cases they pull all data into skb linear. For TCP, this\ncauses a NULL ptr deref in __tcpv4_gso_segment_list_csum at\ntcp_hdr(seg->next).\n\nDetect invalid geometry due to pull, by checking head_skb size.\nDon't just drop, as this may blackhole a destination. Convert to be\nable to pass to regular skb_segment.\n\nApproach and description based on a patch by Willem de Bruijn."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable geometry is built by GRO from TCP packets received off the wire and destroyed on the egress GSO path of a forwarding host, so a remote attacker anywhere on the internet triggers it purely by sending a back-to-back TCP stream through the router/NAT box or container host. No local access or shared link segment is needed.\nAC:L - Once the (real-world, vendor-shipped) rx-gro-list + NAT/conntrack-helper/BPF datapath is in place, the attacker deterministically creates the condition by sending a burst of TCP segments on a helper-tracked port; there is no race, no memory-layout dependency, and nothing outside the attacker's control beyond ordinary target configuration.\nPR:N - The code path is reached from raw forwarded TCP packets with no authentication, credential, or capability check anywhere between NAPI receive and the NULL dereference in the segmentation routine.\nUI:N - Packet reception, GRO coalescing, helper linearization, and egress segmentation all occur in softirq context with no action from any local user or administrator.\nS:U - The fault occurs in kernel network code and its impact is confined to the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The defect is a NULL pointer read of `seg->next->head`/`ip_hdr(seg->next)` that faults immediately; no attacker-controlled memory is read back and no data is returned to the attacker.\nI:N - The `while ((seg = seg->next))` mangling loop terminates before any write occurs, so the checksum/address rewrites never execute on invalid memory — there is no out-of-bounds or use-after-free write primitive.\nA:H - The NULL dereference oopses inside the NET_RX softirq on the forwarding path, killing the CPU/interface and typically panicking the router, and it can be re-triggered at will by simply resending traffic."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv4/tcp_offload.c",
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"net/ipv6/tcpv6_offload.c"
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],
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"versions": [
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{
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"version": "c2ea8cab368b9f25b5937a7f07ab1a66e90b8064",
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"lessThan": "75733986fcb0725c0033cde94764389e287b331e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1f2b859225eb8d1ec974214ce4a581f8c528ae57",
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"lessThan": "e19201b0c67da5146eaac06fd3d44bd7945c3448",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bee88cd5bd83d40b8aec4d6cb729378f707f6197",
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"lessThan": "3fdd8c83e83fa5e82f1b5585245c51e0355c9f46",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bee88cd5bd83d40b8aec4d6cb729378f707f6197",
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"lessThan": "2d4a83a44428de45bfe9dccb0192a3711d1097e0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bee88cd5bd83d40b8aec4d6cb729378f707f6197",
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"lessThan": "17bd3bd82f9f79f3feba15476c2b2c95a9b11ff8",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv4/tcp_offload.c",
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"net/ipv6/tcpv6_offload.c"
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],
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"versions": [
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{
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"version": "6.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.10",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.14",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11.3",
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"lessThanOrEqual": "6.11.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.10.14"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.11.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.12"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/75733986fcb0725c0033cde94764389e287b331e"
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},
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{
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"url": "https://git.kernel.org/stable/c/e19201b0c67da5146eaac06fd3d44bd7945c3448"
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},
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{
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"url": "https://git.kernel.org/stable/c/3fdd8c83e83fa5e82f1b5585245c51e0355c9f46"
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},
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{
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"url": "https://git.kernel.org/stable/c/2d4a83a44428de45bfe9dccb0192a3711d1097e0"
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},
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{
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"url": "https://git.kernel.org/stable/c/17bd3bd82f9f79f3feba15476c2b2c95a9b11ff8"
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}
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],
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"title": "net: gso: fix tcp fraglist segmentation after pull from frag_list",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-49979",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-10-22T13:32:45.687666Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-10-22T13:38:44.690Z"
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}
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}
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]
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}
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} |