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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Skip Recompute DSC Params if no Stream on Link\n\n[why]\nEncounter NULL pointer dereference uner mst + dsc setup.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\n    PGD 0 P4D 0\n    Oops: 0000 [#1] PREEMPT SMP NOPTI\n    CPU: 4 PID: 917 Comm: sway Not tainted 6.3.9-arch1-1 #1 124dc55df4f5272ccb409f39ef4872fc2b3376a2\n    Hardware name: LENOVO 20NKS01Y00/20NKS01Y00, BIOS R12ET61W(1.31 ) 07/28/2022\n    RIP: 0010:drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper]\n    Code: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 00 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 \u003c48\u003e 8\u003e\n    RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293\n    RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224\n    RDX: ffff8afb9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280\n    RBP: ffff8afb83d67000 R08: 0000000000000001 R09: ffff8afb9652f850\n    R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000\n    R13: ffff8afb8d7688a0 R14: ffff8afb8da1a578 R15: 0000000000000224\n    FS:  00007f4dac35ce00(0000) GS:ffff8afe30b00000(0000) knlGS:0000000000000000\n    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n    CR2: 0000000000000008 CR3: 000000010ddc6000 CR4: 00000000003506e0\n    Call Trace:\n\u003cTASK\u003e\n     ? __die+0x23/0x70\n     ? page_fault_oops+0x171/0x4e0\n     ? plist_add+0xbe/0x100\n     ? exc_page_fault+0x7c/0x180\n     ? asm_exc_page_fault+0x26/0x30\n     ? drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026]\n     ? drm_dp_atomic_find_time_slots+0x28/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026]\n     compute_mst_dsc_configs_for_link+0x2ff/0xa40 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054]\n     ? fill_plane_buffer_attributes+0x419/0x510 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054]\n     compute_mst_dsc_configs_for_state+0x1e1/0x250 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054]\n     amdgpu_dm_atomic_check+0xecd/0x1190 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054]\n     drm_atomic_check_only+0x5c5/0xa40\n     drm_mode_atomic_ioctl+0x76e/0xbc0\n\n[how]\ndsc recompute should be skipped if no mode change detected on the new\nrequest. If detected, keep checking whether the stream is already on\ncurrent state or not.\n\n(cherry picked from commit 8151a6c13111b465dbabe07c19f572f7cbd16fef)"
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          "url": "https://git.kernel.org/stable/c/50e376f1fe3bf571d0645ddf48ad37eb58323919"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Have format file honor EVENT_FILE_FL_FREED\n\nWhen eventfs was introduced, special care had to be done to coordinate the\nfreeing of the file meta data with the files that are exposed to user\nspace. The file meta data would have a ref count that is set when the file\nis created and would be decremented and freed after the last user that\nopened the file closed it. When the file meta data was to be freed, it\nwould set a flag (EVENT_FILE_FL_FREED) to denote that the file is freed,\nand any new references made (like new opens or reads) would fail as it is\nmarked freed. This allowed other meta data to be freed after this flag was\nset (under the event_mutex).\n\nAll the files that were dynamically created in the events directory had a\npointer to the file meta data and would call event_release() when the last\nreference to the user space file was closed. This would be the time that it\nis safe to free the file meta data.\n\nA shortcut was made for the \"format\" file. It\u0027s i_private would point to\nthe \"call\" entry directly and not point to the file\u0027s meta data. This is\nbecause all format files are the same for the same \"call\", so it was\nthought there was no reason to differentiate them.  The other files\nmaintain state (like the \"enable\", \"trigger\", etc). But this meant if the\nfile were to disappear, the \"format\" file would be unaware of it.\n\nThis caused a race that could be trigger via the user_events test (that\nwould create dynamic events and free them), and running a loop that would\nread the user_events format files:\n\nIn one console run:\n\n # cd tools/testing/selftests/user_events\n # while true; do ./ftrace_test; done\n\nAnd in another console run:\n\n # cd /sys/kernel/tracing/\n # while true; do cat events/user_events/__test_event/format; done 2\u003e/dev/null\n\nWith KASAN memory checking, it would trigger a use-after-free bug report\n(which was a real bug). This was because the format file was not checking\nthe file\u0027s meta data flag \"EVENT_FILE_FL_FREED\", so it would access the\nevent that the file meta data pointed to after the event was freed.\n\nAfter inspection, there are other locations that were found to not check\nthe EVENT_FILE_FL_FREED flag when accessing the trace_event_file. Add a\nnew helper function: event_file_file() that will make sure that the\nevent_mutex is held, and will return NULL if the trace_event_file has the\nEVENT_FILE_FL_FREED flag set. Have the first reference of the struct file\npointer use event_file_file() and check for NULL. Later uses can still use\nthe event_file_data() helper function if the event_mutex is still held and\nwas not released since the event_file_file() call."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: remove warn in gue_gro_receive on unsupported protocol\n\nDrop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is\nnot known or does not have a GRO handler.\n\nSuch a packet is easily constructed. Syzbot generates them and sets\noff this warning.\n\nRemove the warning as it is expected and not actionable.\n\nThe warning was previously reduced from WARN_ON to WARN_ON_ONCE in\ncommit 270136613bf7 (\"fou: Do WARN_ON_ONCE in gue_gro_receive for bad\nproto callbacks\")."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp: Disable TCP-AO static key after RCU grace period\n\nThe lifetime of TCP-AO static_key is the same as the last\ntcp_ao_info. On the socket destruction tcp_ao_info ceases to be\nwith RCU grace period, while tcp-ao static branch is currently deferred\ndestructed. The static key definition is\n: DEFINE_STATIC_KEY_DEFERRED_FALSE(tcp_ao_needed, HZ);\n\nwhich means that if RCU grace period is delayed by more than a second\nand tcp_ao_needed is in the process of disablement, other CPUs may\nyet see tcp_ao_info which atent dead, but soon-to-be.\nAnd that breaks the assumption of static_key_fast_inc_not_disabled().\n\nSee the comment near the definition:\n\u003e * The caller must make sure that the static key can\u0027t get disabled while\n\u003e * in this function. It doesn\u0027t patch jump labels, only adds a user to\n\u003e * an already enabled static key.\n\nOriginally it was introduced in commit eb8c507296f6 (\"jump_label:\nPrevent key-\u003eenabled int overflow\"), which is needed for the atomic\ncontexts, one of which would be the creation of a full socket from a\nrequest socket. In that atomic context, it\u0027s known by the presence\nof the key (md5/ao) that the static branch is already enabled.\nSo, the ref counter for that static branch is just incremented\ninstead of holding the proper mutex.\nstatic_key_fast_inc_not_disabled() is just a helper for such usage\ncase. But it must not be used if the static branch could get disabled\nin parallel as it\u0027s not protected by jump_label_mutex and as a result,\nraces with jump_label_update() implementation details.\n\nHappened on netdev test-bot[1], so not a theoretical issue:\n\n[] jump_label: Fatal kernel bug, unexpected op at tcp_inbound_hash+0x1a7/0x870 [ffffffffa8c4e9b7] (eb 50 0f 1f 44 != 66 90 0f 1f 00)) size:2 type:1\n[] ------------[ cut here ]------------\n[] kernel BUG at arch/x86/kernel/jump_label.c:73!\n[] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[] CPU: 3 PID: 243 Comm: kworker/3:3 Not tainted 6.10.0-virtme #1\n[] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\n[] Workqueue: events jump_label_update_timeout\n[] RIP: 0010:__jump_label_patch+0x2f6/0x350\n...\n[] Call Trace:\n[]  \u003cTASK\u003e\n[]  arch_jump_label_transform_queue+0x6c/0x110\n[]  __jump_label_update+0xef/0x350\n[]  __static_key_slow_dec_cpuslocked.part.0+0x3c/0x60\n[]  jump_label_update_timeout+0x2c/0x40\n[]  process_one_work+0xe3b/0x1670\n[]  worker_thread+0x587/0xce0\n[]  kthread+0x28a/0x350\n[]  ret_from_fork+0x31/0x70\n[]  ret_from_fork_asm+0x1a/0x30\n[]  \u003c/TASK\u003e\n[] Modules linked in: veth\n[] ---[ end trace 0000000000000000 ]---\n[] RIP: 0010:__jump_label_patch+0x2f6/0x350\n\n[1]: https://netdev-3.bots.linux.dev/vmksft-tcp-ao-dbg/results/696681/5-connect-deny-ipv6/stderr"
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        {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop bad gso csum_start and offset in virtio_net_hdr\n\nTighten csum_start and csum_offset checks in virtio_net_hdr_to_skb\nfor GSO packets.\n\nThe function already checks that a checksum requested with\nVIRTIO_NET_HDR_F_NEEDS_CSUM is in skb linear. But for GSO packets\nthis might not hold for segs after segmentation.\n\nSyzkaller demonstrated to reach this warning in skb_checksum_help\n\n\toffset = skb_checksum_start_offset(skb);\n\tret = -EINVAL;\n\tif (WARN_ON_ONCE(offset \u003e= skb_headlen(skb)))\n\nBy injecting a TSO packet:\n\nWARNING: CPU: 1 PID: 3539 at net/core/dev.c:3284 skb_checksum_help+0x3d0/0x5b0\n ip_do_fragment+0x209/0x1b20 net/ipv4/ip_output.c:774\n ip_finish_output_gso net/ipv4/ip_output.c:279 [inline]\n __ip_finish_output+0x2bd/0x4b0 net/ipv4/ip_output.c:301\n iptunnel_xmit+0x50c/0x930 net/ipv4/ip_tunnel_core.c:82\n ip_tunnel_xmit+0x2296/0x2c70 net/ipv4/ip_tunnel.c:813\n __gre_xmit net/ipv4/ip_gre.c:469 [inline]\n ipgre_xmit+0x759/0xa60 net/ipv4/ip_gre.c:661\n __netdev_start_xmit include/linux/netdevice.h:4850 [inline]\n netdev_start_xmit include/linux/netdevice.h:4864 [inline]\n xmit_one net/core/dev.c:3595 [inline]\n dev_hard_start_xmit+0x261/0x8c0 net/core/dev.c:3611\n __dev_queue_xmit+0x1b97/0x3c90 net/core/dev.c:4261\n packet_snd net/packet/af_packet.c:3073 [inline]\n\nThe geometry of the bad input packet at tcp_gso_segment:\n\n[   52.003050][ T8403] skb len=12202 headroom=244 headlen=12093 tailroom=0\n[   52.003050][ T8403] mac=(168,24) mac_len=24 net=(192,52) trans=244\n[   52.003050][ T8403] shinfo(txflags=0 nr_frags=1 gso(size=1552 type=3 segs=0))\n[   52.003050][ T8403] csum(0x60000c7 start=199 offset=1536\nip_summed=3 complete_sw=0 valid=0 level=0)\n\nMitigate with stricter input validation.\n\ncsum_offset: for GSO packets, deduce the correct value from gso_type.\nThis is already done for USO. Extend it to TSO. Let UFO be:\nudp[46]_ufo_fragment ignores these fields and always computes the\nchecksum in software.\n\ncsum_start: finding the real offset requires parsing to the transport\nheader. Do not add a parser, use existing segmentation parsing. Thanks\nto SKB_GSO_DODGY, that also catches bad packets that are hw offloaded.\nAgain test both TSO and USO. Do not test UFO for the above reason, and\ndo not test UDP tunnel offload.\n\nGSO packet are almost always CHECKSUM_PARTIAL. USO packets may be\nCHECKSUM_NONE since commit 10154dbded6d6 (\"udp: Allow GSO transmit\nfrom devices with no checksum offload\"), but then still these fields\nare initialized correctly in udp4_hwcsum/udp6_hwcsum_outgoing. So no\nneed to test for ip_summed == CHECKSUM_PARTIAL first.\n\nThis revises an existing fix mentioned in the Fixes tag, which broke\nsmall packets with GSO offload, as detected by kselftests."
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