{"id":"CVE-2026-80863","revision":"a740d5c1fdcb454fa0876c1cfdd036a4","records":[{"revision":"a740d5c1fdcb454fa0876c1cfdd036a4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80863","aliases":[],"title":"RDMA/rxe: Fix OOB in free_rd_atomic_resources()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix OOB in free_rd_atomic_resources()\n\nfree_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic.\nUpdating max_dest_rd_atomic before freeing the old array can make the\nfree path walk past the old allocation and trigger a slab out-of-bounds\nwrite catched by KASAN:\n==================================================================\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\nBUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\nWrite of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063\n\nCPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xf7/0x600 mm/kasan/report.c:482\n kasan_report+0xe4/0x120 mm/kasan/report.c:595\n free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\n rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680\n vfs_write+0x2aa/0x1070 fs/read_write.c:686\n ksys_write+0x1f8/0x250 fs/read_write.c:740\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fefc75a70cd\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd\nRDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007\nRBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0\n </TASK>\n\nAllocated by task 11063:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n kasan_save_track+0x14/0x30 mm/kasan/common.c:78\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __do_kmalloc_node mm/slub.c:5296 [inline]\n __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308\n kmalloc_noprof include/linux/slab.h:954 [inline]\n kzalloc_noprof include/linux/slab.h:1188 [inline]\n alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]\n rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma\n---truncated---","state":0,"publishedAt":"2026-09-04T15:55:17.668+00:00","modifiedAt":"2026-10-19T08:44:57.409+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/sw/rxe/rxe_qp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"142c8165b7974b40fa62c393653edb5c00b8b5fe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"30b90b55201902b2b8edcdbe2315ccd4c7547002\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"9b7d66ea88ae9395e42766b94a5c717b158b940a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"f5e6580a3a16a83c743ad5a7c16922854a0d8b71\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"bc6e943794515d2a8417b02597a27bd377468d04\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"4e5f753e8c280278c09f68fe728abf846e2bdfc1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"d219e7a8eed3802970c3e4d243d79c70ef0a31bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\n                            \"lessThan\": \"de329533792a373186d79dca1ca120f8fa0afd05\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/sw/rxe/rxe_qp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.269\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.220\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.187\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.156\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.108\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.49\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.13\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.3\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe","https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002","https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a","https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71","https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04","https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e","https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1","https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf","https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80863","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80863","identifiers":["CVE-2026-80863"]},"retained":false,"historicalAffected":[]}],"coverage":[]}