{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49810", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.226Z", "datePublished": "2025-05-01T14:09:35.470Z", "dateUpdated": "2025-05-04T08:45:49.863Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:45:49.863Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix missing xas_retry() calls in xarray iteration\n\nnetfslib has a number of places in which it performs iteration of an xarray\nwhilst being under the RCU read lock. It *should* call xas_retry() as the\nfirst thing inside of the loop and do \"continue\" if it returns true in case\nthe xarray walker passed out a special value indicating that the walk needs\nto be redone from the root[*].\n\nFix this by adding the missing retry checks.\n\n[*] I wonder if this should be done inside xas_find(), xas_next_node() and\n suchlike, but I'm told that's not an simple change to effect.\n\nThis can cause an oops like that below. Note the faulting address - this\nis an internal value (|0x2) returned from xarray.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000402\n...\nRIP: 0010:netfs_rreq_unlock+0xef/0x380 [netfs]\n...\nCall Trace:\n netfs_rreq_assess+0xa6/0x240 [netfs]\n netfs_readpage+0x173/0x3b0 [netfs]\n ? init_wait_var_entry+0x50/0x50\n filemap_read_page+0x33/0xf0\n filemap_get_pages+0x2f2/0x3f0\n filemap_read+0xaa/0x320\n ? do_filp_open+0xb2/0x150\n ? rmqueue+0x3be/0xe10\n ceph_read_iter+0x1fe/0x680 [ceph]\n ? new_sync_read+0x115/0x1a0\n new_sync_read+0x115/0x1a0\n vfs_read+0xf3/0x180\n ksys_read+0x5f/0xe0\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nChanges:\n========\nver #2)\n - Changed an unsigned int to a size_t to reduce the likelihood of an\n overflow as per Willy's suggestion.\n - Added an additional patch to fix the maths."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/io.c"], "versions": [{"version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "b2cc07a76f1eb12de3b22caf5fdbf856a7bef16d", "status": "affected", "versionType": "git"}, {"version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "7e043a80b5dae5c2d2cf84031501de7827fd6c00", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/io.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.10", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "5.13", "versionEndExcluding": "6.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b2cc07a76f1eb12de3b22caf5fdbf856a7bef16d"}, {"url": "https://git.kernel.org/stable/c/7e043a80b5dae5c2d2cf84031501de7827fd6c00"}], "title": "netfs: Fix missing xas_retry() calls in xarray iteration", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2FF408D3-ACA7-41DC-8339-17AAAF160282", "versionEndExcluding": "6.0.10", "versionStartIncluding": "5.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix missing xas_retry() calls in xarray iteration\n\nnetfslib has a number of places in which it performs iteration of an xarray\nwhilst being under the RCU read lock. It *should* call xas_retry() as the\nfirst thing inside of the loop and do \"continue\" if it returns true in case\nthe xarray walker passed out a special value indicating that the walk needs\nto be redone from the root[*].\n\nFix this by adding the missing retry checks.\n\n[*] I wonder if this should be done inside xas_find(), xas_next_node() and\n suchlike, but I'm told that's not an simple change to effect.\n\nThis can cause an oops like that below. Note the faulting address - this\nis an internal value (|0x2) returned from xarray.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000402\n...\nRIP: 0010:netfs_rreq_unlock+0xef/0x380 [netfs]\n...\nCall Trace:\n netfs_rreq_assess+0xa6/0x240 [netfs]\n netfs_readpage+0x173/0x3b0 [netfs]\n ? init_wait_var_entry+0x50/0x50\n filemap_read_page+0x33/0xf0\n filemap_get_pages+0x2f2/0x3f0\n filemap_read+0xaa/0x320\n ? do_filp_open+0xb2/0x150\n ? rmqueue+0x3be/0xe10\n ceph_read_iter+0x1fe/0x680 [ceph]\n ? new_sync_read+0x115/0x1a0\n new_sync_read+0x115/0x1a0\n vfs_read+0xf3/0x180\n ksys_read+0x5f/0xe0\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nChanges:\n========\nver #2)\n - Changed an unsigned int to a size_t to reduce the likelihood of an\n overflow as per Willy's suggestion.\n - Added an additional patch to fix the maths."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: Se corrigen las llamadas xas_retry() faltantes en la iteraci\u00f3n de un xarray. netfslib realiza la iteraci\u00f3n de un xarray en varios lugares bajo el bloqueo de lectura de la RCU. *Deber\u00eda* llamar a xas_retry() como primer paso dentro del bucle y ejecutar \"continue\" si devuelve verdadero en caso de que el rastreador de xarrays haya pasado un valor especial que indique que el recorrido debe rehacerse desde la ra\u00edz. [*] Se puede solucionar a\u00f1adiendo las comprobaciones de reintento faltantes. [*] Me pregunto si esto deber\u00eda hacerse dentro de xas_find(), xas_next_node() y similares, pero me han dicho que no es un cambio sencillo de implementar. Esto puede causar un error como el que se muestra a continuaci\u00f3n. Observe la direcci\u00f3n del error: se trata de un valor interno (|0x2) devuelto por xarray. ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000402 ... RIP: 0010:netfs_rreq_unlock+0xef/0x380 [netfs] ... Seguimiento de llamadas: netfs_rreq_assess+0xa6/0x240 [netfs] netfs_readpage+0x173/0x3b0 [netfs] ? init_wait_var_entry+0x50/0x50 filemap_read_page+0x33/0xf0 filemap_get_pages+0x2f2/0x3f0 filemap_read+0xaa/0x320 ? do_filp_open+0xb2/0x150 ? rmqueue+0x3be/0xe10 ceph_read_iter+0x1fe/0x680 [ceph] ? new_sync_read+0x115/0x1a0 new_sync_read+0x115/0x1a0 vfs_read+0xf3/0x180 ksys_read+0x5f/0xe0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Changes: ======== ver #2) - Se cambi\u00f3 un int sin signo a un size_t para reducir la probabilidad de un desbordamiento seg\u00fan la sugerencia de Willy. - Se agreg\u00f3 un parche adicional para corregir las matem\u00e1ticas."}], "id": "CVE-2022-49810", "lastModified": "2025-11-07T19:31:03.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2025-05-01T15:16:04.347", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7e043a80b5dae5c2d2cf84031501de7827fd6c00"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2cc07a76f1eb12de3b22caf5fdbf856a7bef16d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: netfs: Fix missing xas_retry() calls in xarray iteration", "id": "2363472", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363472"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfs: Fix missing xas_retry() calls in xarray iteration\nnetfslib has a number of places in which it performs iteration of an xarray\nwhilst being under the RCU read lock. It *should* call xas_retry() as the\nfirst thing inside of the loop and do \"continue\" if it returns true in case\nthe xarray walker passed out a special value indicating that the walk needs\nto be redone from the root[*].\nFix this by adding the missing retry checks.\n[*] I wonder if this should be done inside xas_find(), xas_next_node() and\nsuchlike, but I'm told that's not an simple change to effect.\nThis can cause an oops like that below. Note the faulting address - this\nis an internal value (|0x2) returned from xarray.\nBUG: kernel NULL pointer dereference, address: 0000000000000402\n...\nRIP: 0010:netfs_rreq_unlock+0xef/0x380 [netfs]\n...\nCall Trace:\nnetfs_rreq_assess+0xa6/0x240 [netfs]\nnetfs_readpage+0x173/0x3b0 [netfs]\n? init_wait_var_entry+0x50/0x50\nfilemap_read_page+0x33/0xf0\nfilemap_get_pages+0x2f2/0x3f0\nfilemap_read+0xaa/0x320\n? do_filp_open+0xb2/0x150\n? rmqueue+0x3be/0xe10\nceph_read_iter+0x1fe/0x680 [ceph]\n? new_sync_read+0x115/0x1a0\nnew_sync_read+0x115/0x1a0\nvfs_read+0xf3/0x180\nksys_read+0x5f/0xe0\ndo_syscall_64+0x38/0x90\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nChanges:\n========\nver #2)\n- Changed an unsigned int to a size_t to reduce the likelihood of an\noverflow as per Willy's suggestion.\n- Added an additional patch to fix the maths."], "name": "CVE-2022-49810", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49810\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49810\nhttps://lore.kernel.org/linux-cve-announce/2025050129-CVE-2022-49810-e637@gregkh/T"], "statement": "A missing xas_retry() check in netfs could lead to NULL pointer dereference during xarray iteration under RCU. Exploiting this requires root privileges or a custom kernel module that triggers specific race conditions in netfs operations, which are not accessible to regular users.", "threat_severity": "Moderate"}