221 lines
12 KiB
JSON
221 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-49928",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-05-01T14:05:17.253Z",
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"datePublished": "2025-05-01T14:11:06.068Z",
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"dateUpdated": "2026-08-05T08:56:43.886Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:56:43.886Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Fix null-ptr-deref when xps sysfs alloc failed\n\nThere is a null-ptr-deref when xps sysfs alloc failed:\n BUG: KASAN: null-ptr-deref in sysfs_do_create_link_sd+0x40/0xd0\n Read of size 8 at addr 0000000000000030 by task gssproxy/457\n\n CPU: 5 PID: 457 Comm: gssproxy Not tainted 6.0.0-09040-g02357b27ee03 #9\n Call Trace:\n <TASK>\n dump_stack_lvl+0x34/0x44\n kasan_report+0xa3/0x120\n sysfs_do_create_link_sd+0x40/0xd0\n rpc_sysfs_client_setup+0x161/0x1b0\n rpc_new_client+0x3fc/0x6e0\n rpc_create_xprt+0x71/0x220\n rpc_create+0x1d4/0x350\n gssp_rpc_create+0xc3/0x160\n set_gssp_clnt+0xbc/0x140\n write_gssp+0x116/0x1a0\n proc_reg_write+0xd6/0x130\n vfs_write+0x177/0x690\n ksys_write+0xb9/0x150\n do_syscall_64+0x35/0x80\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nWhen the xprt_switch sysfs alloc failed, should not add xprt and\nswitch sysfs to it, otherwise, maybe null-ptr-deref; also initialize\nthe 'xps_sysfs' to NULL to avoid oops when destroy it."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - On an NFS server, a remote NFSv4 peer can drive SETCLIENTID_CONFIRM/CREATE_SESSION into nfsd4_probe_callback → setup_callback_client → rpc_create → xprt_switch_alloc/rpc_sysfs_*_setup, so the vulnerable SUNRPC sysfs path is reached from network RPC with no local access; lockd NLM→nsm_create similarly triggers rpc_create from remote lock traffic.\nAC:L - The attacker fully controls NFSv4 client/session establishment that allocates RPC clients and can induce memory pressure so rpc_sysfs_xprt_switch_alloc fails, after which the NULL/uninit xps_sysfs dereference is deterministic with no attacker-uncontrollable race.\nPR:N - SETCLIENTID/CREATE_SESSION are ALLOWED_WITHOUT_FH and commonly accepted with AUTH_UNIX (or equivalent weak RPC auth) on nfsd, so an unauthenticated remote peer needs no host privileges or valid local credentials to reach the callback rpc_create path.\nUI:N - The attacker sends the NFSv4 client-setup compounds themselves; no victim action such as mounting a filesystem or opening a file is required beyond nfsd already listening.\nS:U - Impact is a host-kernel oops/panic in SUNRPC sysfs setup under the same OS authority, with no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:N - This is a pure null-pointer dereference in sysfs_create_link_nowarn/sysfs_do_create_link_sd on a NULL xps_sysfs kobject (KASAN read at 0x30), with no OOB read or disclosure primitive.\nI:N - The fault is a NULL/invalid pointer read during sysfs link creation with no memory write, type confusion, or control-flow hijack beyond the ensuing oops.\nA:H - The confirmed KASAN null-ptr-deref in rpc_sysfs_client_setup causes a kernel oops/panic that a remote peer can trigger whenever xprt-switch sysfs allocation fails, fully denying host availability."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sunrpc/sysfs.c"
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],
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"versions": [
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{
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"version": "baea99445dd4675a834e8a5987d2f368adb62e6c",
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"lessThan": "d59722d088a9d86ce6d9d39979e5d1d669d249f7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "baea99445dd4675a834e8a5987d2f368adb62e6c",
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"lessThan": "7b189b0aa8dab14b49c31c65af8a982e96e25b62",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "baea99445dd4675a834e8a5987d2f368adb62e6c",
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"lessThan": "cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sunrpc/sysfs.c"
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],
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"versions": [
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{
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"version": "5.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.78",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.0.8",
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"lessThanOrEqual": "6.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.78"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.0.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.1"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/d59722d088a9d86ce6d9d39979e5d1d669d249f7"
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},
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{
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"url": "https://git.kernel.org/stable/c/7b189b0aa8dab14b49c31c65af8a982e96e25b62"
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},
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{
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"url": "https://git.kernel.org/stable/c/cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a"
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}
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],
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"title": "SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-476",
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"lang": "en",
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"description": "CWE-476 NULL Pointer Dereference"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2025-10-01T14:56:32.147376Z",
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"id": "CVE-2022-49928",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-10-01T14:56:34.636Z"
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}
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}
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]
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}
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} |