CVE-2024-57901: af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK
First published: Wed Jan 15 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK Blamed commit forgot MSG_PEEK case, allowing a crash [1] as found by syzbot. Rework vlan_get_protocol_dgram() to not touch skb at all, so that it can be used from many cpus on the same skb. Add a const qualifier to skb argument. [1] skbuff: skb_under_panic: text:ffffffff8a8ccd05 len:29 put:14 head:ffff88807fc8e400 data:ffff88807fc8e3f4 tail:0x11 end:0x140 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:206 ! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 5892 Comm: syz-executor883 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:skb_panic net/core/skbuff.c:206 [inline] RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216 Code: 0b 8d 48 c7 c6 86 d5 25 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 5a 69 79 f7 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc900038d7638 EFLAGS: 00010282 RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 609ffd18ea660600 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff88802483c8d0 R08: ffffffff817f0a8c R09: 1ffff9200071ae60 R10: dffffc0000000000 R11: fffff5200071ae61 R12: 0000000000000140 R13: ffff88807fc8e400 R14: ffff88807fc8e3f4 R15: 0000000000000011 FS: 00007fbac5e006c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbac5e00d58 CR3: 000000001238e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skb_push+0xe5/0x100 net/core/skbuff.c:2636 vlan_get_protocol_dgram+0x165/0x290 net/packet/af_packet.c:585 packet_recvmsg+0x948/0x1ef0 net/packet/af_packet.c:3552 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg+0x22f/0x280 net/socket.c:1055 ____sys_recvmsg+0x1c6/0x480 net/socket.c:2803 ___sys_recvmsg net/socket.c:2845 [inline] do_recvmmsg+0x426/0xab0 net/socket.c:2940 __sys_recvmmsg net/socket.c:3014 [inline] __do_sys_recvmmsg net/socket.c:3037 [inline] __se_sys_recvmmsg net/socket.c:3030 [inline] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3030 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | =6.13.0-rc4 | |
| Linux Kernel | >=4.19.320<4.20 | |
| Linux Kernel | >=5.4.282<5.4.289 | |
| Linux Kernel | >=5.10.224<5.10.233 | |
| Linux Kernel | >=5.15.165<5.15.176 | |
| Linux Kernel | >=6.1.103<6.1.124 | |
| Linux Kernel | >=6.6.44<6.6.70 | |
| Linux Kernel | >=6.10.3<6.12.9 | |
| Linux Kernel | =6.13-rc1 | |
| Linux Kernel | =6.13-rc2 | |
| Linux Kernel | =6.13-rc3 | |
| Linux Kernel | =6.13-rc4 | |
| Linux Kernel | =6.13-rc5 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/560cbdd26b510626f3f4f27d34c44dfd3dd3499d
- https://git.kernel.org/stable/c/0d3fa6c3c9ca7aa255696150f5b759ac4a4974e1
- https://git.kernel.org/stable/c/de4f8d477c67ec1d7c28f3486c3e47d147d90a01
- https://git.kernel.org/stable/c/5d336714db324bef84490c75dcc48b387ef0346e
- https://git.kernel.org/stable/c/a693b87692b4d7c50f4fc08a996678d60534a9da
- https://git.kernel.org/stable/c/cd8488fdc7116f6da277515647b167859d4f72b1
- https://git.kernel.org/stable/c/f91a5b8089389eb408501af2762f168c3aaa7b79
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-57901
- https://nvd.nist.gov/vuln/detail/CVE-2024-57901
- https://launchpad.net/bugs/cve/CVE-2024-57901
- https://security-tracker.debian.org/tracker/CVE-2024-57901
- https://ubuntu.com/security/CVE-2024-57901
- https://git.kernel.org/linus/f91a5b8089389eb408501af2762f168c3aaa7b79
Frequently Asked Questions
What is the severity of CVE-2024-57901?
CVE-2024-57901 is classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-57901?
To fix CVE-2024-57901, update your Linux kernel to a version beyond 6.13.0-rc4 that includes the relevant patches.
What type of systems are affected by CVE-2024-57901?
CVE-2024-57901 affects systems running the Linux kernel version 6.13.0-rc4 and potentially earlier versions.
What attack vector is associated with CVE-2024-57901?
CVE-2024-57901 can lead to a crash, particularly when handling VLAN protocol datagrams with MSG_PEEK.
Who reported CVE-2024-57901?
CVE-2024-57901 was reported by syzbot, a tool for detecting kernel vulnerabilities.
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