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 kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-libbpfUpgrade kernel-tools-develUpgrade kernel-libbpf-staticUpgrade kernel-modules-extraUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-livepatch-6.1.82-99.168Upgrade kernel-libbpf-develUpgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-modules-extra-commonUpgrade perfUpgrade bpftool-debuginfo | Feb 17, 2025 | Apr 3, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Apr 3, 2024 |
| Suse | — | Upgrade kernel-rt_debug-develUpgrade dlm-kmp-rtUpgrade dtb-sprdUpgrade kernel-obs-buildUpgrade dlm-kmp-defaultUpgrade kernel-docsUpgrade dtb-allwinnerUpgrade gfs2-kmp-azureUpgrade kernel-azure-optionalUpgrade kernel-azure-vdsoUpgrade gfs2-kmp-defaultUpgrade kernel-rt-optionalUpgrade kernel-default-baseUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-source-rtUpgrade kernel-source-vanillaUpgrade dtb-nvidiaUpgrade kernel-debug-vdsoUpgrade dtb-alteraUpgrade kernel-rt-livepatch-develUpgrade reiserfs-kmp-azureUpgrade kernel-64kb-extraUpgrade reiserfs-kmp-64kbUpgrade dtb-rockchipUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-azureUpgrade kernel-defaultUpgrade dtb-broadcomUpgrade kernel-azureUpgrade kernel-azure-develUpgrade kernel-docs-htmlUpgrade ocfs2-kmp-defaultUpgrade kernel-kvmsmall-vdsoUpgrade dtb-qcomUpgrade kernel-rt-extraUpgrade kselftests-kmp-rtUpgrade kernel-default-base-rebuildUpgrade cluster-md-kmp-64kbUpgrade dtb-caviumUpgrade kernel-rtUpgrade ocfs2-kmp-64kbUpgrade kernel-rt-develUpgrade kernel-default-vdsoUpgrade dtb-marvellUpgrade dtb-appleUpgrade dlm-kmp-azureUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-azureUpgrade dtb-lgUpgrade cluster-md-kmp-defaultUpgrade ocfs2-kmp-rtUpgrade kselftests-kmp-defaultUpgrade kernel-default-extraUpgrade kernel-debugUpgrade kernel-64kb-optionalUpgrade kernel-zfcpdumpUpgrade dtb-exynosUpgrade dtb-armUpgrade kernel-source-azureUpgrade kernel-rt_debug-vdsoUpgrade kernel-default-optionalUpgrade kernel-kvmsmallUpgrade kernel-debug-develUpgrade dtb-renesasUpgrade reiserfs-kmp-rtUpgrade kernel-sourceUpgrade kernel-default-develUpgrade cluster-md-kmp-azureUpgrade cluster-md-kmp-rtUpgrade dtb-apmUpgrade kernel-symsUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-kvmsmall-develUpgrade kernel-default-livepatch-develUpgrade kernel-azure-extraUpgrade kernel-64kbUpgrade gfs2-kmp-64kbUpgrade dtb-xilinxUpgrade kernel-obs-qaUpgrade kernel-azure-livepatch-develUpgrade dlm-kmp-64kbUpgrade dtb-amdUpgrade kernel-64kb-develUpgrade gfs2-kmp-rtUpgrade kernel-64kb-livepatch-develUpgrade kernel-syms-rtUpgrade kernel-devel-azureUpgrade kernel-develUpgrade dtb-socionextUpgrade kernel-default-livepatchUpgrade dtb-freescaleUpgrade dtb-hisiliconUpgrade dtb-amlogicUpgrade dtb-amazonUpgrade kernel-devel-rtUpgrade kselftests-kmp-64kbUpgrade kernel-syms-azureUpgrade kernel-rt_debugUpgrade kernel-macrosUpgrade kernel-debug-livepatch-develUpgrade dtb-mediatek | 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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