{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-27388", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:47:42.676Z", "datePublished": "2024-05-01T13:05:05.518Z", "dateUpdated": "2026-08-05T11:29:23.858Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:29:23.858Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: fix some memleaks in gssx_dec_option_array\n\nThe creds and oa->data need to be freed in the error-handling paths after\ntheir allocation. So this patch add these deallocations in the\ncorresponding paths." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable decoder is executed only as a direct consequence of an RPCSEC_GSS_INIT request arriving at in-kernel nfsd over TCP/2049, so a remote NFS client drives entry into the code and controls how often it runs. Although the malformed/short XDR reply is delivered by the local gssproxy daemon, the attacker's reach to the vulnerable function is purely over the network.\nAC:L - The attacker can invoke the upcall path an unlimited number of times pre-authentication, and each invocation pins 256 KB of receive pages plus the in-token pages, letting the attacker themselves create the slab/memory-pressure condition under which the `kzalloc(struct svc_cred)` fails and the dangling-pointer path is taken (trivially so for a memcg-limited/containerized nfsd). The attacker also influences gssproxy reply size via principal name length and group-list size, driving the `-ENOSPC` decode-error paths, so the required conditions are attacker-inducible rather than beyond their control.\nPR:N - `svcauth_gss_proxy_init()` is reached from `svcauth_gss_proc_init()` on the very first leg of the GSS handshake, before any Kerberos credential is validated — the upcall is performed even for a garbage input token. No account, key, or prior authentication on the NFS server is needed.\nUI:N - The path is triggered entirely by an inbound RPC from the attacker; no administrator or user of the target system needs to mount, click, or open anything.\nS:U - The corrupted objects (`gssx_option`, `svc_cred`) and the resulting heap damage are all inside the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - With `oa->count == 1` and `oa->data` dangling, `gssp_accept_sec_context_upcall()` reads `res.options.data[0].value` out of a freed kmalloc-32 object and then dereferences the pointer it finds there into `data->creds`, so freed/reallocated kernel memory contents are consumed and can populate `cr_uid`/`cr_gid`/`cr_principal` — a use-after-free read that both discloses kernel memory and can determine the identity the NFS client is authenticated as.\nI:H - The same path yields `kfree()` of a pointer taken from freed memory plus a double free of `oa->data`, and later `free_svc_cred()` performs `put_group_info()`, `gss_mech_put()` and further `kfree()`s on attacker-groomable pointers — an arbitrary-free and arbitrary-refcount-decrement primitive that is a well-established route to controlled heap corruption and control-flow hijack.\nA:H - The double free trips SLUB's free-object detection (`BUG`/panic, fatal with `panic_on_oops` on the appliance and NAS deployments where nfsd+gssproxy is typical), and the NULL `oa->data` variant of the same incoherent `oa->count` faults immediately in the caller. The unbounded, remotely repeatable leakage of the decoder's allocations additionally drives the server toward OOM." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/auth_gss/gss_rpc_xdr.c" ], "versions": [ { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "b97c37978ca825557d331c9012e0c1ddc0e42364", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "bfa9d86d39a0fe4685f90c3529aa9bd62a9d97a8", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "bb336cd8d5ecb69c430ebe3e7bcff68471d93fa8", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "dd292e884c649f9b1c18af0ec75ca90b390cd044", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "934212a623cbab851848b6de377eb476718c3e4c", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "5e6013ae2c8d420faea553d363935f65badd32c3", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "9806c2393cd2ab0a8e7bb9ffae02ce20e3112ec4", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "996997d1fb2126feda550d6adcedcbd94911fc69", "status": "affected", "versionType": "git" }, { "version": "1d658336b05f8697d6445834f8867f8ad5e4f735", "lessThan": "3cfcfc102a5e57b021b786a755a38935e357797d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sunrpc/auth_gss/gss_rpc_xdr.c" ], "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.311", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.273", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.214", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.153", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.83", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.23", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.11", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.2", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "3.10", "versionEndExcluding": "4.19.311" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.4.273" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.10.214" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "5.15.153" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.1.83" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.6.23" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.7.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.8.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b97c37978ca825557d331c9012e0c1ddc0e42364" }, { "url": "https://git.kernel.org/stable/c/bfa9d86d39a0fe4685f90c3529aa9bd62a9d97a8" }, { "url": "https://git.kernel.org/stable/c/bb336cd8d5ecb69c430ebe3e7bcff68471d93fa8" }, { "url": "https://git.kernel.org/stable/c/dd292e884c649f9b1c18af0ec75ca90b390cd044" }, { "url": "https://git.kernel.org/stable/c/934212a623cbab851848b6de377eb476718c3e4c" }, { "url": "https://git.kernel.org/stable/c/5e6013ae2c8d420faea553d363935f65badd32c3" }, { "url": "https://git.kernel.org/stable/c/9806c2393cd2ab0a8e7bb9ffae02ce20e3112ec4" }, { "url": "https://git.kernel.org/stable/c/996997d1fb2126feda550d6adcedcbd94911fc69" }, { "url": "https://git.kernel.org/stable/c/3cfcfc102a5e57b021b786a755a38935e357797d" } ], "title": "SUNRPC: fix some memleaks in gssx_dec_option_array", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:34:52.507Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/b97c37978ca825557d331c9012e0c1ddc0e42364", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/bfa9d86d39a0fe4685f90c3529aa9bd62a9d97a8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/bb336cd8d5ecb69c430ebe3e7bcff68471d93fa8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dd292e884c649f9b1c18af0ec75ca90b390cd044", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/934212a623cbab851848b6de377eb476718c3e4c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5e6013ae2c8d420faea553d363935f65badd32c3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9806c2393cd2ab0a8e7bb9ffae02ce20e3112ec4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/996997d1fb2126feda550d6adcedcbd94911fc69", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3cfcfc102a5e57b021b786a755a38935e357797d", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-27388", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:43:49.125516Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:28.640Z" } } ] }, "dataVersion": "5.2" }