180 lines
9.9 KiB
JSON
180 lines
9.9 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-2026-53235",
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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": "2026-06-09T07:44:35.393Z",
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"datePublished": "2026-06-25T08:39:32.518Z",
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"dateUpdated": "2026-08-05T12:34:24.581Z"
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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": "2026-08-05T12:34:24.581Z"
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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: add pskb_may_pull() to skb_gro_receive_list()\n\nskb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without\nfirst ensuring the data is in the linear area via pskb_may_pull(). When\nthe skb arrives via napi_gro_frags(), skb_headlen can be 0 (all data in\npage fragments) while skb_gro_offset is non-zero (after IP+TCP header\nparsing). The skb_pull() then decrements skb->len by skb_gro_offset\nbut skb->data_len stays unchanged, hitting BUG_ON(skb->len < skb->data_len)\nin __skb_pull().\n\nThe UDP fraglist GRO path already contains this guard at\nudp_offload.c:749. Adding it to skb_gro_receive_list() itself provides\ncentralized protection for all callers (TCP, UDP, and any future\nprotocols), and ensures the precondition of skb_pull() is satisfied\nbefore it is called.\n\nOn pskb_may_pull() failure, set NAPI_GRO_CB(skb)->flush = 1 so the\nskb is not held as a new GRO head and is instead delivered through the\nnormal receive path, matching the UDP handling."
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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 GRO path processes received IPv4/IPv6 TCP packets in the network stack before socket authentication or routing decisions. A remote peer can send crafted same-flow packets to an exposed interface with fraglist GRO enabled.\nAC:L - Given a vulnerable deployment with rx-gro-list enabled, the attacker controls the packet stream, header layout, checksums, and sequencing needed to reach skb_gro_receive_list(). No race or victim state outside the attacker’s packet timing is required.\nPR:N - The code runs on unauthenticated packet receive before any application or TCP connection authorization. No local account or kernel capability is required for a remote sender.\nUI:N - Exploitation only requires packet delivery to the target network interface. No victim user action is needed.\nS:U - The impact is within the kernel/network stack security authority of the targeted system. There is no VM, IOMMU, or sandbox boundary crossing.\nC:N - The bug triggers an internal skb length invariant failure in __skb_pull() and immediately BUGs. I found no out-of-bounds read, use-after-free, or usable information disclosure primitive before the crash.\nI:N - The vulnerable operation corrupts skb metadata only enough to trip the immediate BUG_ON path. It does not provide an attacker-controlled write or persistent data modification primitive.\nA:H - The reachable failure is BUG() in __skb_pull(), causing a kernel oops/panic or loss of system availability. A remote attacker can repeat the packet sequence to repeatedly crash affected deployments."
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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/core/gro.c"
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],
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"versions": [
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{
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"version": "8d95dc474f85481652a0e422d2f1f079de81f63c",
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"lessThan": "9e636c995b7beeb74ea882968248752821c244c4",
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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": "8d95dc474f85481652a0e422d2f1f079de81f63c",
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"lessThan": "0cde3a004119db637b401c54e77536e4145fc0b4",
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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": "8d95dc474f85481652a0e422d2f1f079de81f63c",
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"lessThan": "848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac",
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"status": "affected",
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"versionType": "git"
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{
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"lessThan": "f2bb3434544454099a5b6dec213567267b05d79d",
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"status": "affected",
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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/core/gro.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": "6.12.94",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.36",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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"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": "6.12.94"
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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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{
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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": "7.0.13"
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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": "7.1"
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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/9e636c995b7beeb74ea882968248752821c244c4"
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},
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{
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"url": "https://git.kernel.org/stable/c/0cde3a004119db637b401c54e77536e4145fc0b4"
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},
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{
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"url": "https://git.kernel.org/stable/c/848571dcbbbea7ba44dd4f7ebe1fbb274afe08ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/f2bb3434544454099a5b6dec213567267b05d79d"
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}
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],
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"title": "net: add pskb_may_pull() to skb_gro_receive_list()",
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