CVE-2026-89798

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89798", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.767Z", "datePublished": "2026-09-16T10:30:29.930Z", "dateUpdated": "2026-10-19T08:52:52.994Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:52:52.994Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpcrdma: arm rn_done before publishing the notification\n\nrpcrdma_rn_register() inserts @rn into rd_xa with xa_alloc() before\nstoring the caller's callback in rn->rn_done. The xarray makes @rn\nreachable to rpcrdma_remove_one(), which walks rd_xa and invokes\nrn->rn_done(rn) for every registered notification. A device removal\nthat races a fresh registration can therefore observe @rn with\nrn_done still NULL, because the notification objects are zero\nallocated by their owners, and call through a NULL function pointer.\n\nStore rn->rn_done before xa_alloc() publishes @rn. The xarray's\nstore-side and load-side ordering then guarantees that any CPU which\nfinds @rn in rd_xa also observes the armed callback.\n\nrpcrdma_rn_unregister() treats a non-NULL rn_done as the sentinel\nfor a completed registration, so the early store must not survive a\nfailed registration. Clear rn_done again when xa_alloc() fails.\nWere it left set, the failed-accept cleanup path would call\nrpcrdma_rn_unregister() on an @rn that was never inserted, erasing\nan unrelated rd_xa slot and underflowing rd_kref."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/xprtrdma/ib_client.c"], "versions": [{"version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "lessThan": "f9fe3cad43c42d874a388583552b39b411d886eb", "status": "affected", "versionType": "git"}, {"version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "lessThan": "3c97b8e76ca2bba9e8770571413aed694068e78e", "status": "affected", "versionType": "git"}, {"version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "lessThan": "ea0408273ccf5df1fb52d9a1b9db4d31600dcb36", "status": "affected", "versionType": "git"}, {"version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "lessThan": "5b06f706374c37375bdff9d21cc10e61df925a92", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/xprtrdma/ib_client.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f9fe3cad43c42d874a388583552b39b411d886eb"}, {"url": "https://git.kernel.org/stable/c/3c97b8e76ca2bba9e8770571413aed694068e78e"}, {"url": "https://git.kernel.org/stable/c/ea0408273ccf5df1fb52d9a1b9db4d31600dcb36"}, {"url": "https://git.kernel.org/stable/c/5b06f706374c37375bdff9d21cc10e61df925a92"}], "title": "rpcrdma: arm rn_done before publishing the notification", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/ib_client.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f9fe3cad43c42d874a388583552b39b411d886eb", "status": "affected", "version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "versionType": "git"}, {"lessThan": "3c97b8e76ca2bba9e8770571413aed694068e78e", "status": "affected", "version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "versionType": "git"}, {"lessThan": "ea0408273ccf5df1fb52d9a1b9db4d31600dcb36", "status": "affected", "version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "versionType": "git"}, {"lessThan": "5b06f706374c37375bdff9d21cc10e61df925a92", "status": "affected", "version": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/ib_client.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpcrdma: arm rn_done before publishing the notification\n\nrpcrdma_rn_register() inserts @rn into rd_xa with xa_alloc() before\nstoring the caller's callback in rn->rn_done. The xarray makes @rn\nreachable to rpcrdma_remove_one(), which walks rd_xa and invokes\nrn->rn_done(rn) for every registered notification. A device removal\nthat races a fresh registration can therefore observe @rn with\nrn_done still NULL, because the notification objects are zero\nallocated by their owners, and call through a NULL function pointer.\n\nStore rn->rn_done before xa_alloc() publishes @rn. The xarray's\nstore-side and load-side ordering then guarantees that any CPU which\nfinds @rn in rd_xa also observes the armed callback.\n\nrpcrdma_rn_unregister() treats a non-NULL rn_done as the sentinel\nfor a completed registration, so the early store must not survive a\nfailed registration. Clear rn_done again when xa_alloc() fails.\nWere it left set, the failed-accept cleanup path would call\nrpcrdma_rn_unregister() on an @rn that was never inserted, erasing\nan unrelated rd_xa slot and underflowing rd_kref."}], "id": "CVE-2026-89798", "lastModified": "2026-10-19T09:18:23.583", "metrics": {}, "published": "2026-09-16T11:16:44.660", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c97b8e76ca2bba9e8770571413aed694068e78e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b06f706374c37375bdff9d21cc10e61df925a92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea0408273ccf5df1fb52d9a1b9db4d31600dcb36"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9fe3cad43c42d874a388583552b39b411d886eb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7e86845a0346efc95fddaa97ce5cd6a8bda8c71c,3c97b8e76ca2bba9e8770571413aed694068e78e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7e86845a0346efc95fddaa97ce5cd6a8bda8c71c,ea0408273ccf5df1fb52d9a1b9db4d31600dcb36)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7e86845a0346efc95fddaa97ce5cd6a8bda8c71c,5b06f706374c37375bdff9d21cc10e61df925a92)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-17T14:15:07.172619+00:00", "title": "Null Pointer Dereference in RPCRDMA Notification Registration", "updated": "2026-09-17T23:30:17.219993+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476", "CWE-832"]}