227 lines
11 KiB
JSON
227 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-2026-99133",
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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": "2026-09-25T10:25:14.394Z",
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"datePublished": "2026-10-28T10:34:46.398Z",
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"dateUpdated": "2026-10-30T12:42:06.467Z"
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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": "2026-10-30T12:42:06.467Z"
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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/iucv: fix the recvmsg window update\n\niucv_sock_recvmsg() sends the HiperSockets-only AF_IUCV_FLAG_WIN without\ntesting the transport, so on a classic z/VM socket iucv_send_ctrl() sizes\nthe skb through a NULL iucv->hs_dev. SO_MSGLIMIT accepts 1, so msglimit / 2\nis zero and one recvmsg() on its own socket is enough for an unprivileged\nprocess to take a spurious disconnect.\n\nIt also calls iucv_send_ctrl() under spin_lock_bh(&message_q.lock), which\nallocates GFP_KERNEL inside a section the code treats as atomic. Sending\noutside that lock lets two recvmsg() reach afiucv_hs_send() at once, where\nmsg_recv is sampled for the advertised window and subtracted after\ndev_queue_xmit() -- and sendmsg reaches that counter under lock_sock()\nwhile recvmsg holds no socket lock, so both can subtract the same value,\nthe counter goes negative and the credit reaches the peer twice.\n\nTest the transport, claim the credit with atomic_xchg() after the last\nerror exit and hand it back if the transmit fails, and send once the lock\nis dropped."
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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/iucv/af_iucv.c"
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],
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"versions": [
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{
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"version": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "01123990f59ce32a1a5e690a4aeee002e932bb07",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "1ebe68bbf8e75eeccaca0c7bc9694f5bc0c3f00a",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "23e7fbbdca5aaba2a9a7bb9e4f2dc179c290ee76",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "ce8aac3eb57f5366fa082b7cb8a1ac5652274f37",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "8f2efa742f4cfe7dd756154f8bc07350dbe3ec92",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "fe7393a627db2d093e8c0cae69d619b30fefae5f",
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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": "3881ac441f642d56503818123446f7298442236b",
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"lessThan": "fa5acd038ea657ad5033713d6916214cbd349151",
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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/iucv/af_iucv.c"
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],
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"versions": [
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{
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"version": "3.2",
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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": "3.2",
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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": "5.15.224",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.161",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.115",
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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": "6.18.59",
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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": "7.2.13",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "3.2",
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"versionEndExcluding": "5.15.224"
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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": "3.2",
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"versionEndExcluding": "6.1.191"
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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": "3.2",
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"versionEndExcluding": "6.6.161"
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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": "3.2",
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"versionEndExcluding": "6.12.115"
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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": "3.2",
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"versionEndExcluding": "6.18.59"
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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": "3.2",
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"versionEndExcluding": "7.2.13"
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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": "3.2",
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"versionEndExcluding": "7.3"
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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/01123990f59ce32a1a5e690a4aeee002e932bb07"
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},
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{
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"url": "https://git.kernel.org/stable/c/1ebe68bbf8e75eeccaca0c7bc9694f5bc0c3f00a"
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},
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{
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"url": "https://git.kernel.org/stable/c/23e7fbbdca5aaba2a9a7bb9e4f2dc179c290ee76"
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},
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{
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"url": "https://git.kernel.org/stable/c/ce8aac3eb57f5366fa082b7cb8a1ac5652274f37"
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},
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{
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"url": "https://git.kernel.org/stable/c/8f2efa742f4cfe7dd756154f8bc07350dbe3ec92"
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},
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{
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"url": "https://git.kernel.org/stable/c/fe7393a627db2d093e8c0cae69d619b30fefae5f"
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},
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{
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"url": "https://git.kernel.org/stable/c/fa5acd038ea657ad5033713d6916214cbd349151"
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}
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],
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"title": "net/iucv: fix the recvmsg window update",
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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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} |