CVE-2024-26862: packet: annotate data-races around ignore_outgoing
First published: Wed Apr 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: packet: annotate data-races around ignore_outgoing ignore_outgoing is read locklessly from dev_queue_xmit_nit() and packet_getsockopt() Add appropriate READ_ONCE()/WRITE_ONCE() annotations. syzbot reported: BUG: KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt write to 0xffff888107804542 of 1 bytes by task 22618 on cpu 0: packet_setsockopt+0xd83/0xfd0 net/packet/af_packet.c:4003 do_sock_setsockopt net/socket.c:2311 [inline] __sys_setsockopt+0x1d8/0x250 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 read to 0xffff888107804542 of 1 bytes by task 27 on cpu 1: dev_queue_xmit_nit+0x82/0x620 net/core/dev.c:2248 xmit_one net/core/dev.c:3527 [inline] dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3547 __dev_queue_xmit+0xf24/0x1dd0 net/core/dev.c:4335 dev_queue_xmit include/linux/netdevice.h:3091 [inline] batadv_send_skb_packet+0x264/0x300 net/batman-adv/send.c:108 batadv_send_broadcast_skb+0x24/0x30 net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x3f0/0x4b0 net/batman-adv/bat_iv_ogm.c:1700 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335 worker_thread+0x526/0x730 kernel/workqueue.c:3416 kthread+0x1d1/0x210 kernel/kthread.c:388 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 27 Comm: kworker/u8:1 Tainted: G W 6.8.0-syzkaller-08073-g480e035fc4c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.4.273 | 5.4.273 |
| redhat/kernel | <5.10.214 | 5.10.214 |
| redhat/kernel | <5.15.153 | 5.15.153 |
| redhat/kernel | <6.1.83 | 6.1.83 |
| redhat/kernel | <6.6.23 | 6.6.23 |
| redhat/kernel | <6.7.11 | 6.7.11 |
| redhat/kernel | <6.8.2 | 6.8.2 |
| redhat/kernel | <6.9 | 6.9 |
| Linux Kernel | >=4.20<5.4.273 | |
| Linux Kernel | >=5.5<5.10.214 | |
| Linux Kernel | >=5.11<5.15.153 | |
| Linux Kernel | >=5.16<6.1.83 | |
| Linux Kernel | >=6.2<6.6.23 | |
| Linux Kernel | >=6.7<6.7.11 | |
| Linux Kernel | >=6.8<6.8.2 | |
| Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- https://git.kernel.org/stable/c/2c02c5059c78a52d170bdee4a369b470de6deb37
- https://git.kernel.org/stable/c/68e84120319d4fc298fcdb14cf0bea6a0f64ffbd
- https://git.kernel.org/stable/c/6ebfad33161afacb3e1e59ed1c2feefef70f9f97
- https://git.kernel.org/stable/c/84c510411e321caff3c07e6cd0f917f06633cfc0
- https://git.kernel.org/stable/c/8b1e273c6afcf00d3c40a54ada7d6aac1b503b97
- https://git.kernel.org/stable/c/d35b62c224e70797f8a1c37fe9bc4b3e294b7560
- https://git.kernel.org/stable/c/ee413f30ec4fe94a0bdf32c8f042cb06fa913234
- https://git.kernel.org/stable/c/ef7eed7e11d23337310ecc2c014ecaeea52719c5
- https://launchpad.net/bugs/cve/CVE-2024-26862
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26862
- https://nvd.nist.gov/vuln/detail/CVE-2024-26862
- https://security-tracker.debian.org/tracker/CVE-2024-26862
- https://ubuntu.com/security/CVE-2024-26862
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/linus/6ebfad33161afacb3e1e59ed1c2feefef70f9f97
- https://access.redhat.com/security/cve/CVE-2024-26862
- https://lore.kernel.org/linux-cve-announce/2024041736-CVE-2024-26862-2605@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275728
- https://access.redhat.com/errata/RHSA-2024:9315
- https://timecalculators.io/
- https://bugzilla.redhat.com/show_bug.cgi?id=2275727
Frequently Asked Questions
What is the severity of CVE-2024-26862?
CVE-2024-26862 has a medium severity rating due to its impact on data races in the Linux kernel.
How do I fix CVE-2024-26862?
To fix CVE-2024-26862, update your Linux kernel to the latest available version that includes the patch.
Which versions of the Linux kernel are affected by CVE-2024-26862?
CVE-2024-26862 affects multiple versions of the Linux kernel, including versions prior to 5.4.273, 5.10.214, and others.
What are the consequences of exploiting CVE-2024-26862?
Exploitation of CVE-2024-26862 could potentially lead to data corruption or instability in systems utilizing affected kernel versions.
Is there a known exploit for CVE-2024-26862?
As of now, there are no publicly known exploits for CVE-2024-26862, but its existence poses a risk in affected systems.
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