{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.091Z", "datePublished": "2026-05-27T12:55:52.756Z", "dateUpdated": "2026-05-27T12:55:52.756Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:55:52.756Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix potential UAF after skb_unshare() failure\n\nIf skb_unshare() fails to unshare a packet due to allocation failure in\nrxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread())\nwill be NULL'd out. This will likely cause the call to\ntrace_rxrpc_rx_done() to oops.\n\nFix this by moving the unsharing down to where rxrpc_input_call_event()\ncalls rxrpc_input_call_packet(). There are a number of places prior to\nthat where we ignore DATA packets for a variety of reasons (such as the\ncall already being complete) for which an unshare is then avoided.\n\nAnd with that, rxrpc_input_packet() doesn't need to take a pointer to the\npointer to the packet, so change that to just a pointer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/rxrpc.h", "net/rxrpc/ar-internal.h", "net/rxrpc/call_event.c", "net/rxrpc/io_thread.c", "net/rxrpc/skbuff.c"], "versions": [{"version": "2d1faf7a0ca3c0b327cf064c80e4e775532c9319", "lessThan": "e3bf143b1e98fb3d6d9e6825bcd683974d478e8c", "status": "affected", "versionType": "git"}, {"version": "2d1faf7a0ca3c0b327cf064c80e4e775532c9319", "lessThan": "bf20f46d94f1db38e6ffc0ca204a5fe0de01b495", "status": "affected", "versionType": "git"}, {"version": "2d1faf7a0ca3c0b327cf064c80e4e775532c9319", "lessThan": "996b0487b3cdda4c91811dbb1c9564626bc840bd", "status": "affected", "versionType": "git"}, {"version": "2d1faf7a0ca3c0b327cf064c80e4e775532c9319", "lessThan": "8fde6296c4d4da2be7ab761305ab7f232b94eefd", "status": "affected", "versionType": "git"}, {"version": "2d1faf7a0ca3c0b327cf064c80e4e775532c9319", "lessThan": "1f2740150f904bfa60e4bad74d65add3ccb5e7f8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/rxrpc.h", "net/rxrpc/ar-internal.h", "net/rxrpc/call_event.c", "net/rxrpc/io_thread.c", "net/rxrpc/skbuff.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "6.2", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c"}, {"url": "https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495"}, {"url": "https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd"}, {"url": "https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd"}, {"url": "https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8"}], "title": "rxrpc: Fix potential UAF after skb_unshare() failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix potential UAF after skb_unshare() failure\n\nIf skb_unshare() fails to unshare a packet due to allocation failure in\nrxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread())\nwill be NULL'd out. This will likely cause the call to\ntrace_rxrpc_rx_done() to oops.\n\nFix this by moving the unsharing down to where rxrpc_input_call_event()\ncalls rxrpc_input_call_packet(). There are a number of places prior to\nthat where we ignore DATA packets for a variety of reasons (such as the\ncall already being complete) for which an unshare is then avoided.\n\nAnd with that, rxrpc_input_packet() doesn't need to take a pointer to the\npointer to the packet, so change that to just a pointer."}], "id": "CVE-2026-45998", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:17.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: rxrpc: Fix potential UAF after skb_unshare() failure", "id": "2482024", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482024"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's `rxrpc` subsystem. This vulnerability arises when the system attempts to unshare a packet buffer, and the operation fails due to an allocation issue. This failure can lead to a Use-After-Free (UAF) condition, where the system attempts to access memory that has been freed, potentially causing a system crash."], "name": "CVE-2026-45998", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45998\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45998\nhttps://lore.kernel.org/linux-cve-announce/2026052741-CVE-2026-45998-6b5d@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2d1faf7a0ca3c0b327cf064c80e4e775532c9319,e3bf143b1e98fb3d6d9e6825bcd683974d478e8c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2d1faf7a0ca3c0b327cf064c80e4e775532c9319,bf20f46d94f1db38e6ffc0ca204a5fe0de01b495)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2d1faf7a0ca3c0b327cf064c80e4e775532c9319,996b0487b3cdda4c91811dbb1c9564626bc840bd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2d1faf7a0ca3c0b327cf064c80e4e775532c9319,8fde6296c4d4da2be7ab761305ab7f232b94eefd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2d1faf7a0ca3c0b327cf064c80e4e775532c9319,1f2740150f904bfa60e4bad74d65add3ccb5e7f8)"}}], "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": "6.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.27,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-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": "2026-05-27T18:45:39.823778+00:00", "updated": "2026-05-28T05:30:06.699212+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}