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.
CVSS Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade python3-perfUpgrade kernel-modules-extraUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-modules-extra-commonUpgrade kernel-livepatch-6.1.82-99.168Upgrade bpftoolUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-toolsUpgrade perfUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfo | Feb 17, 2025 | Apr 3, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Apr 3, 2024 |
| Suse | — | Upgrade dtb-nvidiaUpgrade dtb-sprdUpgrade kernel-obs-buildUpgrade kernel-rtUpgrade dlm-kmp-rtUpgrade dtb-caviumUpgrade kernel-rt-optionalUpgrade reiserfs-kmp-64kbUpgrade kernel-source-vanillaUpgrade dtb-alteraUpgrade kernel-64kb-extraUpgrade gfs2-kmp-defaultUpgrade kernel-docs-htmlUpgrade kernel-debug-vdsoUpgrade kernel-defaultUpgrade kernel-default-base-rebuildUpgrade kernel-default-baseUpgrade kernel-rt_debug-develUpgrade kselftests-kmp-azureUpgrade dtb-broadcomUpgrade ocfs2-kmp-defaultUpgrade kernel-azure-vdsoUpgrade cluster-md-kmp-64kbUpgrade gfs2-kmp-azureUpgrade ocfs2-kmp-64kbUpgrade dtb-allwinnerUpgrade kernel-docsUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-source-rtUpgrade kernel-azure-develUpgrade kernel-azureUpgrade kernel-kvmsmall-vdsoUpgrade dtb-rockchipUpgrade kselftests-kmp-rtUpgrade kernel-rt-extraUpgrade dtb-qcomUpgrade kernel-rt-vdsoUpgrade reiserfs-kmp-azureUpgrade kernel-rt-livepatch-develUpgrade dlm-kmp-defaultUpgrade kernel-azure-optionalUpgrade dtb-lgUpgrade dtb-amdUpgrade kernel-64kb-develUpgrade dtb-appleUpgrade gfs2-kmp-rtUpgrade kernel-default-vdsoUpgrade kernel-sourceUpgrade kernel-default-develUpgrade kernel-azure-livepatch-develUpgrade cluster-md-kmp-rtUpgrade cluster-md-kmp-azureUpgrade reiserfs-kmp-rtUpgrade kernel-rt_debug-vdsoUpgrade kernel-macrosUpgrade kernel-rt_debugUpgrade kernel-devel-rtUpgrade kernel-debug-livepatch-develUpgrade dtb-mediatekUpgrade dtb-marvellUpgrade dlm-kmp-azureUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-64kbUpgrade kernel-syms-azureUpgrade dtb-xilinxUpgrade dtb-apmUpgrade kernel-symsUpgrade kernel-obs-qaUpgrade kernel-kvmsmall-develUpgrade kernel-default-livepatch-develUpgrade kernel-azure-extraUpgrade gfs2-kmp-64kbUpgrade cluster-md-kmp-defaultUpgrade kernel-default-extraUpgrade kselftests-kmp-defaultUpgrade ocfs2-kmp-rtUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-64kbUpgrade kernel-debugUpgrade kernel-64kb-optionalUpgrade dtb-renesasUpgrade kernel-kvmsmallUpgrade dlm-kmp-64kbUpgrade reiserfs-kmp-defaultUpgrade dtb-amlogicUpgrade dtb-freescaleUpgrade kernel-devel-azureUpgrade kernel-debug-develUpgrade kernel-source-azureUpgrade dtb-armUpgrade dtb-exynosUpgrade kernel-rt-develUpgrade kernel-zfcpdumpUpgrade kernel-default-livepatchUpgrade kernel-syms-rtUpgrade kernel-develUpgrade dtb-hisiliconUpgrade kernel-default-optionalUpgrade dtb-amazonUpgrade dtb-socionextUpgrade kernel-64kb-livepatch-devel | Jun 24, 2024 | Apr 3, 2024 |
| Ubuntu | — | Upgrade linux-raspi-realtime | Feb 11, 2025 | Apr 3, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 14, 2025 | Apr 3, 2024 |
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