161 lines
8.4 KiB
JSON
161 lines
8.4 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-2026-68379",
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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": "2026-07-30T09:28:09.387Z",
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"datePublished": "2026-08-10T12:03:57.537Z",
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"dateUpdated": "2026-08-17T05:04:25.324Z"
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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": "2026-08-17T05:04:25.324Z"
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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\ntcp: fix TIME_WAIT socket reference leak on PSP policy failure\n\nRelease the TIME_WAIT socket reference and jump to discard_it\nupon PSP policy failure in both IPv4 and IPv6 receive paths.\nThis prevents a memory leak of tcp_tw_bucket structures."
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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 leak is triggered entirely by a received TCP segment processed in tcp_v4_rcv()/tcp_v6_rcv() do_time_wait path; a remote peer sending a crafted SYN to a socket in TIME_WAIT reaches the faulty code with no local access.\nAC:L - The attacker fully controls the trigger: send a plain non-PSP-encapsulated SYN with a sequence number above tw_rcv_nxt on the known 4-tuple of a just-closed PSP connection, which deterministically yields TCP_TW_SYN plus a PSP policy failure and leaks the reference every time.\nPR:N - No authentication or privileges are needed; the packet is handled in the TCP input path before any socket-level authorization, and the sender need only be the remote endpoint of a previously established connection.\nUI:N - Processing happens in softirq context on packet receive with no involvement from any local user or administrator.\nS:U - The leaked tcp_timewait_sock and psp_assoc objects are kernel memory managed by the same security authority as the vulnerable TCP receive path; no privilege or virtualization boundary is crossed.\nC:N - The missing inet_twsk_put() only omits a refcount decrement; no memory is read out of bounds, no freed object is accessed, and no data is returned to the attacker.\nI:N - No kernel data is modified or corrupted; the refcount simply never reaches zero, and refcount_t saturates rather than wrapping, so no use-after-free or write primitive arises.\nA:H - Each triggering packet permanently leaks a tcp_timewait_sock slab object plus its pinned psp_assoc, never reclaimed for the life of the boot; an unauthenticated peer can repeat this across arbitrarily many connections to exhaust kernel memory and drive the system to OOM."
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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_ipv4.c",
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"net/ipv6/tcp_ipv6.c"
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],
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"versions": [
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{
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"version": "659a2899a57da59f433182eba571881884d6323e",
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"lessThan": "e666af5dcc905ba694745963174d232deb478c55",
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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": "659a2899a57da59f433182eba571881884d6323e",
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"lessThan": "374742a961becbbfc7fbfd1382d978a05e492741",
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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": "659a2899a57da59f433182eba571881884d6323e",
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"lessThan": "2c1931a81122c3cdc4c89448fe0442c69e21c0d5",
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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_ipv4.c",
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"net/ipv6/tcp_ipv6.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.42",
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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": "7.1.6",
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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": "6.18",
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"versionEndExcluding": "6.18.42"
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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": "6.18",
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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": "6.18",
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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/e666af5dcc905ba694745963174d232deb478c55"
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},
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{
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"url": "https://git.kernel.org/stable/c/374742a961becbbfc7fbfd1382d978a05e492741"
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},
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{
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"url": "https://git.kernel.org/stable/c/2c1931a81122c3cdc4c89448fe0442c69e21c0d5"
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}
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],
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"title": "tcp: fix TIME_WAIT socket reference leak on PSP policy failure",
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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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}
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} |