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CVE-2024-26731— bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()

EPSS 0.04% · P14
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I. Basic Information for CVE-2024-26731

Vulnerability Information
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Vulnerability Title
bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() syzbot reported the following NULL pointer dereference issue [1]: BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:0x0 [...] Call Trace: <TASK> sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 If sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called concurrently, psock->saved_data_ready can be NULL, causing the above issue. This patch fixes this issue by calling the appropriate data ready function using the sk_psock_data_ready() helper and protecting it from concurrency with sk->sk_callback_lock.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux dd628fc697ee59b76bd3877c4bd13f07ccc3776f ~ 4588b13abcbd561ec67f5b3c1cb2eff690990a54 -
LinuxLinux 6.4 -

II. Public POCs for CVE-2024-26731

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III. Intelligence Information for CVE-2024-26731

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Same Patch Batch · Linux · 2024-04-03 · 94 CVEs total

CVE-2024-26744RDMA/srpt: Support specifying the srpt_service_guid parameter
CVE-2024-26741dccp/tcp: Unhash sk from ehash for tb2 alloc failure after check_estalblished().
CVE-2024-26739net/sched: act_mirred: don't override retval if we already lost the skb
CVE-2024-26735ipv6: sr: fix possible use-after-free and null-ptr-deref
CVE-2024-26734devlink: fix possible use-after-free and memory leaks in devlink_init()
CVE-2024-26733arp: Prevent overflow in arp_req_get().
CVE-2024-26732net: implement lockless setsockopt(SO_PEEK_OFF)
CVE-2024-26730hwmon: (nct6775) Fix access to temperature configuration registers
CVE-2024-26736afs: Increase buffer size in afs_update_volume_status()
CVE-2024-26743RDMA/qedr: Fix qedr_create_user_qp error flow
CVE-2024-26742scsi: smartpqi: Fix disable_managed_interrupts
CVE-2024-26747usb: roles: fix NULL pointer issue when put module's reference
CVE-2024-26748usb: cdns3: fix memory double free when handle zero packet
CVE-2024-26749usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()
CVE-2024-26751ARM: ep93xx: Add terminator to gpiod_lookup_table
CVE-2024-26752l2tp: pass correct message length to ip6_append_data
CVE-2024-26753crypto: virtio/akcipher - Fix stack overflow on memcpy
CVE-2024-26754gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()
CVE-2024-26755md: Don't suspend the array for interrupted reshape
CVE-2024-26756md: Don't register sync_thread for reshape directly

Showing top 20 of 94 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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