{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48816", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-16T11:38:08.900Z", "datePublished": "2024-07-16T11:44:04.654Z", "dateUpdated": "2026-08-05T08:52:28.866Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:28.866Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: lock against ->sock changing during sysfs read\n\n->sock can be set to NULL asynchronously unless ->recv_mutex is held.\nSo it is important to hold that mutex. Otherwise a sysfs read can\ntrigger an oops.\nCommit 17f09d3f619a (\"SUNRPC: Check if the xprt is connected before\nhandling sysfs reads\") appears to attempt to fix this problem, but it\nonly narrows the race window." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached only by reading world-readable SUNRPC sysfs attributes under /sys/kernel/sunrpc/xprt-switches/*/xprt-*/{srcaddr,xprt_info}, which requires local process access and is not reachable via network packets or adjacent-link protocols.\nAC:L - An unprivileged attacker can continuously poll those attributes while inducing concurrent transport teardown (NFS automount idle unmount, peer RST/reconnect storms, or forced disconnect), controlling both sides of the race and retrying until sock is observed NULL or freed mid-getsockname.\nPR:L - srcaddr is mode 0644 and xprt_info is 0444 with no capability check on the show path, and /sys/kernel/sunrpc directories are world-traversable, so a normal local user can trigger the vulnerable reads without root or init-namespace privileges.\nUI:N - The attacker performs the sysfs reads and can drive teardown/reconnect themselves; no separate victim action such as opening a crafted file or mounting a filesystem is required at exploit time.\nS:U - Impact is confined to the local host kernel (oops or socket UAF within SUNRPC/socket heap state) and does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - Without recv_mutex, a non-NULL sock pointer can be loaded then used after xs_reset_transport()'s fput frees the socket, a classic socket UAF that heap spraying can turn into arbitrary kernel memory disclosure.\nI:H - The same unlocked race allows use-after-free of the struct socket while kernel_getsockname/xs_sock_getport runs, enabling reclaim and corruption of adjacent heap state for arbitrary write and control-flow hijacking under standard UAF exploitation.\nA:H - The documented failure mode is a kernel oops from NULL sock dereference during sysfs read, and the UAF path likewise crashes on stale socket use, so availability impact is High even without a full exploit." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/sysfs.c", "net/sunrpc/xprtsock.c" ], "versions": [ { "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61", "lessThan": "fdc42287ae3f8a35cc2098307f52d7864b4bc8ed", "status": "affected", "versionType": "git" }, { "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61", "lessThan": "9482ab4540f5bcc869b44c067ae99b5fca16bd07", "status": "affected", "versionType": "git" }, { "version": "a8482488a7d6d320f63a9ee1912dbb5ae5b80a61", "lessThan": "b49ea673e119f59c71645e2f65b3ccad857c90ee", "status": "affected", "versionType": "git" }, { "version": "21a2be1a5145d072deedc7cdc5b2d17380abea75", "status": "affected", "versionType": "git" }, { "version": "77876473912d1bf1ed16bffa1674e5ff0f499f25", "status": "affected", "versionType": "git" }, { "version": "5.10.67", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "5.13.19", "lessThan": "5.14", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/sysfs.c", "net/sunrpc/xprtsock.c" ], "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.10", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "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": "5.14", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.16.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.67" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fdc42287ae3f8a35cc2098307f52d7864b4bc8ed" }, { "url": "https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07" }, { "url": "https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee" } ], "title": "SUNRPC: lock against ->sock changing during sysfs read", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.591Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48816", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:58:15.719556Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:00.382Z" } } ] } }