CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-50096 – nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error
https://notcve.org/view.php?id=CVE-2024-50096
In the Linux kernel, the following vulnerability has been resolved: nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error The `nouveau_dmem_copy_one` function ensures that the copy push command is sent to the device firmware but does not track whether it was executed successfully. In the case of a copy error (e.g., firmware or hardware failure), the copy push command will be sent via the firmware channel, and `nouveau_dmem_copy_one` will likely report success, leading to the `migrate_to_ram` function returning a dirty HIGH_USER page to the user. This can result in a security vulnerability, as a HIGH_USER page that may contain sensitive or corrupted data could be returned to the user. To prevent this vulnerability, we allocate a zero page. Thus, in case of an error, a non-dirty (zero) page will be returned to the user. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nouveau/dmem: Se corrige la vulnerabilidad en migrants_to_ram tras un error de copia. La función `nouveau_dmem_copy_one` garantiza que el comando de copia push se envíe al firmware del dispositivo, pero no rastrea si se ejecutó correctamente. En el caso de un error de copia (por ejemplo, fallo del firmware o hardware), el comando de copia push se enviará a través del canal de firmware y `nouveau_dmem_copy_one` probablemente informará el éxito, lo que llevará a la función `migrate_to_ram` a devolver una página HIGH_USER sucia al usuario. • https://git.kernel.org/stable/c/5be73b690875f7eb2d2defb54ccd7f2f12074984 https://git.kernel.org/stable/c/fd9bb7e996bab9b9049fffe3f3d3b50dee191d27 https://git.kernel.org/stable/c/73f75d2b5aee5a735cf64b8ab4543d5c20dbbdd9 https://git.kernel.org/stable/c/8c3de9282dde21ce3c1bf1bde3166a4510547aa9 https://git.kernel.org/stable/c/614bfb2050982d23d53d0d51c4079dba0437c883 https://git.kernel.org/stable/c/697e3ddcf1f8b68bd531fc34eead27c000bdf3e1 https://git.kernel.org/stable/c/ab4d113b6718b076046018292f821d5aa4b844f8 https://git.kernel.org/stable/c/835745a377a4519decd1a36d6b926e369 •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2024-50095 – RDMA/mad: Improve handling of timed out WRs of mad agent
https://notcve.org/view.php?id=CVE-2024-50095
In the Linux kernel, the following vulnerability has been resolved: RDMA/mad: Improve handling of timed out WRs of mad agent Current timeout handler of mad agent acquires/releases mad_agent_priv lock for every timed out WRs. This causes heavy locking contention when higher no. of WRs are to be handled inside timeout handler. This leads to softlockup with below trace in some use cases where rdma-cm path is used to establish connection between peer nodes Trace: ----- BUG: soft lockup - CPU#4 stuck for 26s! [kworker/u128:3:19767] CPU: 4 PID: 19767 Comm: kworker/u128:3 Kdump: loaded Tainted: G OE ------- --- 5.14.0-427.13.1.el9_4.x86_64 #1 Hardware name: Dell Inc. PowerEdge R740/01YM03, BIOS 2.4.8 11/26/2019 Workqueue: ib_mad1 timeout_sends [ib_core] RIP: 0010:__do_softirq+0x78/0x2ac RSP: 0018:ffffb253449e4f98 EFLAGS: 00000246 RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 000000000000001f RDX: 000000000000001d RSI: 000000003d1879ab RDI: fff363b66fd3a86b RBP: ffffb253604cbcd8 R08: 0000009065635f3b R09: 0000000000000000 R10: 0000000000000040 R11: ffffb253449e4ff8 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000040 FS: 0000000000000000(0000) GS:ffff8caa1fc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd9ec9db900 CR3: 0000000891934006 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> ? show_trace_log_lvl+0x1c4/0x2df ? • https://git.kernel.org/stable/c/713adaf0ecfc49405f6e5d9e409d984f628de818 https://git.kernel.org/stable/c/7022a517bf1ca37ef5a474365bcc5eafd345a13a https://git.kernel.org/stable/c/e80eadb3604a92d2d086e956b8b2692b699d4d0a https://git.kernel.org/stable/c/a195a42dd25ca4f12489687065d00be64939409f https://git.kernel.org/stable/c/3e799fa463508abe7a738ce5d0f62a8dfd05262a https://git.kernel.org/stable/c/2a777679b8ccd09a9a65ea0716ef10365179caac •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50091 – dm vdo: don't refer to dedupe_context after releasing it
https://notcve.org/view.php?id=CVE-2024-50091
In the Linux kernel, the following vulnerability has been resolved: dm vdo: don't refer to dedupe_context after releasing it Clear the dedupe_context pointer in a data_vio whenever ownership of the context is lost, so that vdo can't examine it accidentally. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm vdo: no hacer referencia a dedupe_context después de liberarlo. Borre el puntero dedupe_context en un data_vio siempre que se pierda la propiedad del contexto, de modo que vdo no pueda examinarlo accidentalmente. • https://git.kernel.org/stable/c/63ef073084c67878d7a92e15ad055172da3f05a3 https://git.kernel.org/stable/c/0808ebf2f80b962e75741a41ced372a7116f1e26 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2023-52920 – bpf: support non-r10 register spill/fill to/from stack in precision tracking
https://notcve.org/view.php?id=CVE-2023-52920
In the Linux kernel, the following vulnerability has been resolved: bpf: support non-r10 register spill/fill to/from stack in precision tracking Use instruction (jump) history to record instructions that performed register spill/fill to/from stack, regardless if this was done through read-only r10 register, or any other register after copying r10 into it *and* potentially adjusting offset. To make this work reliably, we push extra per-instruction flags into instruction history, encoding stack slot index (spi) and stack frame number in extra 10 bit flags we take away from prev_idx in instruction history. We don't touch idx field for maximum performance, as it's checked most frequently during backtracking. This change removes basically the last remaining practical limitation of precision backtracking logic in BPF verifier. It fixes known deficiencies, but also opens up new opportunities to reduce number of verified states, explored in the subsequent patches. There are only three differences in selftests' BPF object files according to veristat, all in the positive direction (less states). File Program Insns (A) Insns (B) Insns (DIFF) States (A) States (B) States (DIFF) -------------------------------------- ------------- --------- --------- ------------- ---------- ---------- ------------- test_cls_redirect_dynptr.bpf.linked3.o cls_redirect 2987 2864 -123 (-4.12%) 240 231 -9 (-3.75%) xdp_synproxy_kern.bpf.linked3.o syncookie_tc 82848 82661 -187 (-0.23%) 5107 5073 -34 (-0.67%) xdp_synproxy_kern.bpf.linked3.o syncookie_xdp 85116 84964 -152 (-0.18%) 5162 5130 -32 (-0.62%) Note, I avoided renaming jmp_history to more generic insn_hist to minimize number of lines changed and potential merge conflicts between bpf and bpf-next trees. Notice also cur_hist_entry pointer reset to NULL at the beginning of instruction verification loop. This pointer avoids the problem of relying on last jump history entry's insn_idx to determine whether we already have entry for current instruction or not. It can happen that we added jump history entry because current instruction is_jmp_point(), but also we need to add instruction flags for stack access. • https://git.kernel.org/stable/c/ecc2aeeaa08a355d84d3ca9c3d2512399a194f29 https://git.kernel.org/stable/c/41f6f64e6999a837048b1bd13a2f8742964eca6b •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2024-50083 – tcp: fix mptcp DSS corruption due to large pmtu xmit
https://notcve.org/view.php?id=CVE-2024-50083
In the Linux kernel, the following vulnerability has been resolved: tcp: fix mptcp DSS corruption due to large pmtu xmit Syzkaller was able to trigger a DSS corruption: TCP: request_sock_subflow_v4: Possible SYN flooding on port [::]:20002. Sending cookies. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5227 at net/mptcp/protocol.c:695 __mptcp_move_skbs_from_subflow+0x20a9/0x21f0 net/mptcp/protocol.c:695 Modules linked in: CPU: 0 UID: 0 PID: 5227 Comm: syz-executor350 Not tainted 6.11.0-syzkaller-08829-gaf9c191ac2a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:__mptcp_move_skbs_from_subflow+0x20a9/0x21f0 net/mptcp/protocol.c:695 Code: 0f b6 dc 31 ff 89 de e8 b5 dd ea f5 89 d8 48 81 c4 50 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 98 da ea f5 90 <0f> 0b 90 e9 47 ff ff ff e8 8a da ea f5 90 0f 0b 90 e9 99 e0 ff ff RSP: 0018:ffffc90000006db8 EFLAGS: 00010246 RAX: ffffffff8ba9df18 RBX: 00000000000055f0 RCX: ffff888030023c00 RDX: 0000000000000100 RSI: 00000000000081e5 RDI: 00000000000055f0 RBP: 1ffff110062bf1ae R08: ffffffff8ba9cf12 R09: 1ffff110062bf1b8 R10: dffffc0000000000 R11: ffffed10062bf1b9 R12: 0000000000000000 R13: dffffc0000000000 R14: 00000000700cec61 R15: 00000000000081e5 FS: 000055556679c380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020287000 CR3: 0000000077892000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> move_skbs_to_msk net/mptcp/protocol.c:811 [inline] mptcp_data_ready+0x29c/0xa90 net/mptcp/protocol.c:854 subflow_data_ready+0x34a/0x920 net/mptcp/subflow.c:1490 tcp_data_queue+0x20fd/0x76c0 net/ipv4/tcp_input.c:5283 tcp_rcv_established+0xfba/0x2020 net/ipv4/tcp_input.c:6237 tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1915 tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2350 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5662 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775 process_backlog+0x662/0x15b0 net/core/dev.c:6107 __napi_poll+0xcb/0x490 net/core/dev.c:6771 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 </IRQ> <TASK> __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x1764/0x3e80 net/core/dev.c:4451 dev_queue_xmit include/linux/netdevice.h:3094 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236 ip_local_out net/ipv4/ip_output.c:130 [inline] __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:536 __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466 tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline] tcp_mtu_probe net/ipv4/tcp_output.c:2547 [inline] tcp_write_xmit+0x641d/0x6bf0 net/ipv4/tcp_output.c:2752 __tcp_push_pending_frames+0x9b/0x360 net/ipv4/tcp_output.c:3015 tcp_push_pending_frames include/net/tcp.h:2107 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5714 [inline] tcp_rcv_established+0x1026/0x2020 net/ipv4/tcp_input.c:6239 tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1915 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x214/0x350 net/core/sock.c:3072 release_sock+0x61/0x1f0 net/core/sock.c:3626 mptcp_push_ ---truncated--- • https://git.kernel.org/stable/c/85712484110df308215077be6ee21c4e57d7dec2 https://git.kernel.org/stable/c/c38add9ac0e4d4f418e6443a688491499021add9 https://git.kernel.org/stable/c/9729010a0ac5945c1bf6847dd0778d8a1a4b72ac https://git.kernel.org/stable/c/ba8e65814e519eeb17d086952bce7de93f7a40da https://git.kernel.org/stable/c/229dfdc36f31a8d47433438bc0e6e1662c4ab404 https://git.kernel.org/stable/c/db04d1848777ae52a7ab93c4591e7c0bf8f55fb4 https://git.kernel.org/stable/c/4dabcdf581217e60690467a37c956a5b8dbc6bd9 •