161 lines
9.0 KiB
JSON
161 lines
9.0 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-2026-97589",
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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": "2026-09-24T16:01:01.157Z",
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"datePublished": "2026-09-25T10:22:07.441Z",
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"dateUpdated": "2026-10-19T09:09:53.140Z"
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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": "2026-10-19T09:09:53.140Z"
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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\ns390/crypto: Fix wrong return code to engine in asynch callbacks\n\nWhen crypto_finalize_hash_request() or\ncrypto_finalize_skcipher_request() explicitly completes a request, the\ndo_one_request callback must return 0 to indicate successful\nhandling. Returning a negative error code causes the crypto engine to\nassume the driver failed to take ownership and triggers a second\ncompletion via crypto_request_complete(), resulting in a double\ncompletion. This pattern occurs in paes_s390.c 4 times and once in\nphmac_s390.c.\n\nFixed in phmac_do_one_request() and all four paes do_one_request\ncallbacks (ecb, cbc, ctr, xts) by returning 0 after explicit\nfinalization instead of propagating the error code."
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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:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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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 faulty return is in ecb/cbc/ctr/xts_paes_do_one_request() and phmac_do_one_request(), which run in the crypto engine worker. They are reached through local crypto API users: AF_ALG sockets binding \"ecb(paes)\" etc. (algif_skcipher recvmsg -> ecb_paes_crypt -> engine) or dm-crypt. No remote peer supplies the data that causes the failure.\nAC:H - The double completion fires only when the engine path returns an error. That needs the protected key to be invalidated (-EKEYEXPIRED, e.g. the wrapping key changed) and then re-conversion to fail in paes_convert_key() because the card is busy or offline. AF_ALG blocks setkey while op sockets exist, so the attacker cannot force this state.\nPR:L - AF_ALG socket creation and binding the paes/phmac algorithms need no capability, so a local unprivileged user holding usable key material can push requests through the paes engine path.\nUI:N - No victim action is needed. Once the engine-side failure condition exists, the attacker's own AF_ALG requests (or ordinary dm-crypt I/O) hit the double completion.\nS:U - The corruption stays within the kernel's own security authority. There is no guest-to-host or other boundary crossing.\nC:H - crypto_pump_requests() calls crypto_request_complete() a second time after crypto_finalize_skcipher_request(). In AF_ALG the extra complete of ctx->wait lets a later request's areq be freed while the engine still processes it, so the engine keeps reading freed memory (use-after-free).\nI:H - The engine's skcipher walk and cpacf output keep writing into the freed request and scatterlist memory. For dm-crypt, the same bio completes twice. Both are use-after-free writes that can be used for heap corruption.\nA:H - The double completion corrupts request/bio lifetime (double bio end or a use-after-free on the areq), which can crash the kernel or corrupt dm-crypt I/O."
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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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"arch/s390/crypto/paes_s390.c",
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"arch/s390/crypto/phmac_s390.c"
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],
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"versions": [
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{
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"version": "6cd87cb5ef6ca50ae17c371482ceaab1d635e232",
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"lessThan": "972e0d9b7d1d112240ccde1f1be85bf9ffaa1720",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "5480291aa848e19e61175abfd457933516db70c6",
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"status": "affected",
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{
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"lessThan": "ac1481320110b803ab9b79ab4d2ca11a74fc05f2",
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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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"arch/s390/crypto/paes_s390.c",
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"arch/s390/crypto/phmac_s390.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.53",
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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": "7.2.7",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.53"
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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": "6.16",
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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/972e0d9b7d1d112240ccde1f1be85bf9ffaa1720"
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},
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{
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"url": "https://git.kernel.org/stable/c/5480291aa848e19e61175abfd457933516db70c6"
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},
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{
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"url": "https://git.kernel.org/stable/c/ac1481320110b803ab9b79ab4d2ca11a74fc05f2"
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}
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],
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"title": "s390/crypto: Fix wrong return code to engine in asynch callbacks",
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