CVE-2026-80863

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix OOB in free rd atomic resources()

BUG: KASAN: slab-out-of-bounds in free rd atomic resource drivers/infiniband/sw/rxe/rxe qp.c:180 [inline] BUG: KASAN: slab-out-of-bounds in free rd atomic resources drivers/infiniband/sw/rxe/rxe qp.c:171 [inline] BUG: KASAN: slab-out-of-bounds in free rd atomic resources drivers/infiniband/sw/rxe/rxe qp.c:163 [inline] BUG: KASAN: slab-out-of-bounds in rxe qp from attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe qp.c:712 Write of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063

CPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full) Hardware 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 Call Trace: dump stack lib/dump stack.c:94 [inline] dump stack lvl+0x10e/0x1f0 lib/dump stack.c:120 print address description mm/kasan/report.c:378 [inline] print report+0xf7/0x600 mm/kasan/report.c:482 kasan report+0xe4/0x120 mm/kasan/report.c:595 free rd atomic resource drivers/infiniband/sw/rxe/rxe qp.c:180 [inline] free rd atomic resources drivers/infiniband/sw/rxe/rxe qp.c:171 [inline] free rd atomic resources drivers/infiniband/sw/rxe/rxe qp.c:163 [inline] rxe qp from attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe qp.c:712 rxe modify qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe verbs.c:623 ib security modify qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 ib modify qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify qp+0x13ca/0x1940 drivers/infiniband/core/uverbs cmd.c:1932 ib uverbs modify qp+0xcb/0x120 drivers/infiniband/core/uverbs cmd.c:1958 ib uverbs write+0xb86/0x1030 drivers/infiniband/core/uverbs main.c:680 vfs write+0x2aa/0x1070 fs/read write.c:686 ksys write+0x1f8/0x250 fs/read write.c:740 do syscall x64 arch/x86/entry/syscall 64.c:63 [inline] do syscall 64+0x116/0x800 arch/x86/entry/syscall 64.c:94 entry SYSCALL 64 after hwframe+0x77/0x7f RIP: 0033:0x7fefc75a70cd Code: 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 RSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd RDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0

Allocated by task 11063: kasan save stack+0x33/0x60 mm/kasan/common.c:57 kasan save track+0x14/0x30 mm/kasan/common.c:78 poison kmalloc redzone mm/kasan/common.c:398 [inline] kasan kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan kmalloc include/linux/kasan.h:263 [inline] do kmalloc node mm/slub.c:5296 [inline] kmalloc noprof+0x32a/0x850 mm/slub.c:5308 kmalloc noprof include/linux/slab.h:954 [inline] kzalloc noprof include/linux/slab.h:1188 [inline] alloc rd atomic resources drivers/infiniband/sw/rxe/rxe qp.c:155 [inline] rxe qp from attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe qp.c:714 rxe modify qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe verbs.c:623 ib security modify qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 ib modify qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify qp+0x13ca/0x1940 drivers/infiniband/core/uverbs cmd.c:1932 ib uverbs modify qp+0xcb/0x120 drivers/infiniband/core/uverbs cmd.c:1958 ib uverbs write+0xb86/0x1030 drivers/infiniband/core/uverbs ma ---truncated---