{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50543", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-07T15:15:38.667Z", "datePublished": "2025-10-07T15:21:07.939Z", "dateUpdated": "2026-08-05T08:59:06.203Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:06.203Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix mr->map double free\n\nrxe_mr_cleanup() which tries to free mr->map again will be called when\nrxe_mr_init_user() fails:\n\n CPU: 0 PID: 4917 Comm: rdma_flush_serv Kdump: loaded Not tainted 6.1.0-rc1-roce-flush+ #25\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n Call Trace:\n \n dump_stack_lvl+0x45/0x5d\n panic+0x19e/0x349\n end_report.part.0+0x54/0x7c\n kasan_report.cold+0xa/0xf\n rxe_mr_cleanup+0x9d/0xf0 [rdma_rxe]\n __rxe_cleanup+0x10a/0x1e0 [rdma_rxe]\n rxe_reg_user_mr+0xb7/0xd0 [rdma_rxe]\n ib_uverbs_reg_mr+0x26a/0x480 [ib_uverbs]\n ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0x1a2/0x250 [ib_uverbs]\n ib_uverbs_cmd_verbs+0x1397/0x15a0 [ib_uverbs]\n\nThis issue was firstly exposed since commit b18c7da63fcb (\"RDMA/rxe: Fix\nmemory leak in error path code\") and then we fixed it in commit\n8ff5f5d9d8cf (\"RDMA/rxe: Prevent double freeing rxe_map_set()\") but this\nfix was reverted together at last by commit 1e75550648da (Revert\n\"RDMA/rxe: Create duplicate mapping tables for FMRs\")\n\nSimply let rxe_mr_cleanup() always handle freeing the mr->map once it is\nsuccessfully allocated." } ], "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 bug is reached via the local InfiniBand uverbs REG_MR command path (ib_uverbs_reg_mr → rxe_reg_user_mr → rxe_mr_init_user), not via received RDMA/Ethernet packets or any network-facing handler.\nAC:L - The attacker can reliably force the error path by inducing GFP_KERNEL pressure so rxe_mr_alloc() partially fails and leaves a dangling mr->map, or on highmem systems via page_address() returning NULL; both sides of the resulting double-free are under attacker control with no race.\nPR:L - Creating the SoftRoCE device requires CAP_NET_ADMIN, but once present /dev/infiniband/uverbs* is mode 0666 with no capability check on open or reg_mr, so any unprivileged local user can trigger the bug.\nUI:N - Exploitation requires only the attacker's own uverbs calls (open device, alloc PD, reg MR); no victim action is needed.\nS:U - The double-free corrupts kernel heap memory within the same host kernel authority; it does not cross a VM, IOMMU, or other security boundary.\nC:H - A kernel heap double-free enables use-after-free style heap spraying and reclaim of the freed objects, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same double-free/UAF primitive enables heap corruption sufficient for arbitrary kernel writes and control-flow hijacking / privilege escalation.\nA:H - The double-free immediately triggers KASAN reports, oopses, or panics (as shown in the fix commit call trace), so availability impact is total kernel crash." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/sw/rxe/rxe_mr.c" ], "versions": [ { "version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "6ce577f09013206e36e674cd27da3707b2278268", "status": "affected", "versionType": "git" }, { "version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "06f73568f553b5be6ba7f6fe274d333ea29fc46d", "status": "affected", "versionType": "git" }, { "version": "1e75550648da1fa1cd1969e7597355de8fe8caf6", "lessThan": "7d984dac8f6bf4ebd3398af82b357e1d181ecaac", "status": "affected", "versionType": "git" }, { "version": "e004a35e8148ad9fc438b0479884641acf382896", "status": "affected", "versionType": "git" }, { "version": "5.19.4", "lessThan": "5.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/sw/rxe/rxe_mr.c" ], "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "6.0", "versionEndExcluding": "6.0.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/6ce577f09013206e36e674cd27da3707b2278268" }, { "url": "https://git.kernel.org/stable/c/06f73568f553b5be6ba7f6fe274d333ea29fc46d" }, { "url": "https://git.kernel.org/stable/c/7d984dac8f6bf4ebd3398af82b357e1d181ecaac" } ], "title": "RDMA/rxe: Fix mr->map double free", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-50543", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-06-10T20:40:50.837424Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:06.141Z" } } ] } }