138 lines
7.3 KiB
JSON
138 lines
7.3 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-2026-68440",
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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": "2026-07-30T09:28:09.394Z",
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"datePublished": "2026-08-12T00:07:29.605Z",
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"dateUpdated": "2026-08-17T05:05:37.444Z"
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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": "2026-08-17T05:05:37.444Z"
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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: txgbe: fix heap overflow when reading module EEPROM\n\ntxgbe_read_eeprom_hostif() always copies round_up(length, 4) bytes\ninto the caller buffer, which ethtool allocates with exactly 'length'\nbytes. A non-4-aligned length therefore causes an out-of-bounds write.\nCopy only the remaining bytes on the final dword instead."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The bug is triggered through the ethtool genetlink interface (ETHTOOL_MSG_MODULE_EEPROM_GET) from a local socket; no network packet or remote peer data reaches the vulnerable copy loop.\nAC:L - The attacker fully controls the request length attribute (policy allows 1..128 with no alignment constraint), so any non-4-aligned value deterministically triggers the over-copy on every call, repeatably and without racing.\nPR:L - The ethtool op is gated by GENL_UNS_ADMIN_PERM, i.e. ns-capable CAP_NET_ADMIN in the user namespace owning the netdev's netns, which an unprivileged user can obtain via unshare -Urn rather than real root.\nUI:N - The attacker issues the ethtool netlink request directly; no victim action, module plug event, or administrator step is needed.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The overflow is a heap memory-corruption primitive adjacent to attacker-groomable slab objects, and corrupting neighbouring object metadata (lengths, pointers) can be leveraged to disclose arbitrary kernel memory back through the same ethtool reply.\nI:H - This is an out-of-bounds heap write with firmware/module-supplied bytes past the end of a caller-sized kmalloc buffer, giving an attacker-triggerable corruption of adjacent kernel data that can be steered toward control-flow hijacking.\nA:H - Corrupting adjacent slab objects or allocator metadata leads to kernel oops/panic, and on KASAN or hardened configurations the slab-out-of-bounds write itself aborts the kernel, so a repeatable denial of service is available."
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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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"drivers/net/ethernet/wangxun/txgbe/txgbe_aml.c"
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],
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"versions": [
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{
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"version": "9b97b6b5635b3de18debd07a3adcf25198ec8299",
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"lessThan": "febcced6958158e7e90a55a8567b3f5c3639c0b9",
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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": "9b97b6b5635b3de18debd07a3adcf25198ec8299",
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"lessThan": "6a905a71fd43ce8b45f05044b11491337f232c9d",
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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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"drivers/net/ethernet/wangxun/txgbe/txgbe_aml.c"
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],
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"versions": [
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{
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"version": "6.19",
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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": "6.19",
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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": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.19",
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"versionEndExcluding": "7.1.6"
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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": "6.19",
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"versionEndExcluding": "7.2"
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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/febcced6958158e7e90a55a8567b3f5c3639c0b9"
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},
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{
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"url": "https://git.kernel.org/stable/c/6a905a71fd43ce8b45f05044b11491337f232c9d"
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}
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],
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"title": "net: txgbe: fix heap overflow when reading module EEPROM",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |