CVE-2024-41000

CVE Details

Release Date:

2024-07-12

Description

In the Linux kernel, the following vulnerability has been resolved:\nblock/ioctl: prefer different overflow check\nRunning syzkaller with the newly reintroduced signed integer overflow\nsanitizer shows this report:\n[ 62.982337] ------------[ cut here ]------------\n[ 62.985692] cgroup: Invalid name\n[ 62.986211] UBSAN: signed-integer-overflow in ../block/ioctl.c:36:46\n[ 62.989370] 9pnet_fd: p9_fd_create_tcp (7343): problem connecting socket to 127.0.0.1\n[ 62.992992] 9223372036854775807 + 4095 cannot be represented in type 'long long'\n[ 62.997827] 9pnet_fd: p9_fd_create_tcp (7345): problem connecting socket to 127.0.0.1\n[ 62.999369] random: crng reseeded on system resumption\n[ 63.000634] GUP no longer grows the stack in syz-executor.2 (7353): 20002000-20003000 (20001000)\n[ 63.000668] CPU: 0 PID: 7353 Comm: syz-executor.2 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1\n[ 63.000677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 63.000682] Call Trace:\n[ 63.000686] \n[ 63.000731] dump_stack_lvl+0x93/0xd0\n[ 63.000919] __get_user_pages+0x903/0xd30\n[ 63.001030] __gup_longterm_locked+0x153e/0x1ba0\n[ 63.001041] ? _raw_read_unlock_irqrestore+0x17/0x50\n[ 63.001072] ? try_get_folio+0x29c/0x2d0\n[ 63.001083] internal_get_user_pages_fast+0x1119/0x1530\n[ 63.001109] iov_iter_extract_pages+0x23b/0x580\n[ 63.001206] bio_iov_iter_get_pages+0x4de/0x1220\n[ 63.001235] iomap_dio_bio_iter+0x9b6/0x1410\n[ 63.001297] __iomap_dio_rw+0xab4/0x1810\n[ 63.001316] iomap_dio_rw+0x45/0xa0\n[ 63.001328] ext4_file_write_iter+0xdde/0x1390\n[ 63.001372] vfs_write+0x599/0xbd0\n[ 63.001394] ksys_write+0xc8/0x190\n[ 63.001403] do_syscall_64+0xd4/0x1b0\n[ 63.001421] ? arch_exit_to_user_mode_prepare+0x3a/0x60\n[ 63.001479] entry_SYSCALL_64_after_hwframe+0x6f/0x77\n[ 63.001535] RIP: 0033:0x7f7fd3ebf539\n[ 63.001551] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 14 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48\n[ 63.001562] RSP: 002b:00007f7fd32570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ 63.001584] RAX: ffffffffffffffda RBX: 00007f7fd3ff3f80 RCX: 00007f7fd3ebf539\n[ 63.001590] RDX: 4db6d1e4f7e43360 RSI: 0000000020000000 RDI: 0000000000000004\n[ 63.001595] RBP: 00007f7fd3f1e496 R08: 0000000000000000 R09: 0000000000000000\n[ 63.001599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n[ 63.001604] R13: 0000000000000006 R14: 00007f7fd3ff3f80 R15: 00007ffd415ad2b8\n...\n[ 63.018142] ---[ end trace ]---\nHistorically, the signed integer overflow sanitizer did not work in the\nkernel due to its interaction with `-fwrapv` but this has since been\nchanged [1] in the newest version of Clang; It was re-enabled in the\nkernel with Commit 557f8c582a9ba8ab ('ubsan: Reintroduce signed overflow\nsanitizer').\nLet's rework this overflow checking logic to not actually perform an\noverflow during the check itself, thus avoiding the UBSAN splat.\n[1]: https://github.com/llvm/llvm-project/pull/82432

See more information about CVE-2024-41000 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12618	2024-09-12
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12618	2024-09-12