{"cvss":7.8,"datePublished":"2026-05-27T14:17:17.407","dateUpdated":"2026-09-16T13:17:59.330","description":"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","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e3bf143b1e98fb3d6d9e6825bcd683974d478e8c","status":"affected","version":"2d1faf7a0ca3c0b327cf064c80e4e775532c9319","versionType":"git"},{"lessThan":"bf20f46d94f1db38e6ffc0ca204a5fe0de01b495","status":"affected","version":"2d1faf7a0ca3c0b327cf064c80e4e775532c9319","versionType":"git"},{"lessThan":"996b0487b3cdda4c91811dbb1c9564626bc840bd","status":"affected","version":"2d1faf7a0ca3c0b327cf064c80e4e775532c9319","versionType":"git"},{"lessThan":"8fde6296c4d4da2be7ab761305ab7f232b94eefd","status":"affected","version":"2d1faf7a0ca3c0b327cf064c80e4e775532c9319","versionType":"git"},{"lessThan":"1f2740150f904bfa60e4bad74d65add3ccb5e7f8","status":"affected","version":"2d1faf7a0ca3c0b327cf064c80e4e775532c9319","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","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"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.2"},{"lessThan":"6.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.86","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"affectedData":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"kernel","product":"Red 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Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}],"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"A1A92866-F406-43B5-B2D1-CFC274753E9D","versionEndExcluding":"6.6.140","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"55DA1C62-9991-451E-B8A8-E0004E00F789","versionEndExcluding":"6.12.86","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"A10AC84F-C058-47D5-85B4-E6E51A613B74","versionEndExcluding":"6.18.27","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3","versionEndExcluding":"7.0.4","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":"2026-09-16T13:17:59.330","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":5.9,"source":"nvd@nist.gov","type":"Primary"},{"cvssData":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.0,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":1.0,"impactScore":5.9,"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary"}]},"published":"2026-05-27T14:17:17.407","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:34911"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:55445"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:65708"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:65712"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:67721"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/errata/RHSA-2026:67723"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://access.redhat.com/security/cve/CVE-2026-45998"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482024"},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45998.json"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-416"}],"source":"nvd@nist.gov","type":"Primary"},{"description":[{"lang":"en","value":"CWE-825"}],"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary"}]},"severity":"HIGH","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix potential UAF after skb_unshare() fai..."}