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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()\n\nrtw_get_wpa_ie() reads bytes at fixed offsets into a vendor-specific\ninformation element without checking that the element is long enough,\ncausing an out-of-bounds read for a short trailing IE.\n\nThe function locates a vendor-specific IE (EID 221) with rtw_get_ie()\nand then compares a 4-byte OUI+type at pbuf + 2 and reads a 2-byte\nversion word at pbuf + 6. Those accesses require the IE body to be at\nleast 6 bytes, but rtw_get_ie() only guarantees that the element fits\nwithin the buffer; it does not enforce a minimum body length. A\nvendor-specific IE whose length byte is 0 to 5, placed at the end of\nthe buffer, therefore makes these reads run past the end of the IE and\npast the end of the buffer itself.\n\nThe buffer holds information elements taken from received management\nframes and from the IE blob passed to rtw_cfg80211_set_wpa_ie(), which\nis kmemdup\u0027d to its exact length, so the read can run off the end of\nthe allocation.\n\nThe sibling helpers rtw_get_sec_ie(), rtw_get_wapi_ie() and\nrtw_get_wps_ie() in this file already reject too-short vendor-specific\nIEs before their OUI memcmp(); rtw_get_wpa_ie() was never brought in\nline with them, and needs a minimum of 6 rather than 4 bytes because\nof the version word. Add the missing length check."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: qcom-geni: fix TX DMA buffer flush\n\nWhen transmit flushing a qcom-geni UART during an ongoing TX DMA, the\nUART gets stuck infinitely repeating corrupted TX DMA frames.\n\nThe DMA-mode uart_ops does not provide a flush_buffer callback, so an\nin-flight transfer can complete after serial core has reset the transmit\nkfifo, underflowing its length and resubmitting page-sized transfers\nindefinitely. Add one that stops the transfer and clears tx_remaining\nand tx_queued.\n\nThe stop path was also broken: it unmapped the buffer while the serial\nengine could still read it, and never reset the TX DMA state machine.\nCancel the main sequencer command first, then reset the state machine\nand wait for it before unmapping. Drop the early return so a pending\nmapping is also cleaned up when the main command is inactive.\n\nThe bug can be triggered from userspace with a large write immediately\nfollowed by TCOFLUSH. A following tcdrain will hang forever. The bug was\nreproduced and this fix was validated on Arduino Uno Q (QRB2210)\nusing /dev/ttyHS1."
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              "value": "AV:L - Exploitation requires local write(2) and tcflush(TCOFLUSH)/tcdrain() ioctls on a Qualcomm GENI DMA UART (/dev/ttyHS*), reachable only through local TTY device-node syscalls, not over a network protocol.\nAC:L - The attacker fully controls timing by issuing a large write during active TX DMA immediately followed by TCOFLUSH; no races or external victim state beyond concurrent DMA completion are required to reproduce the hang and DMA loop.\nPR:L - Triggering the bug needs only permission to open, write, and ioctl an assigned ttyHS serial port (typically dialout-group or embedded-app access on Qualcomm/Android/IoT targets), not init-namespace root or CAP_SYS_ADMIN.\nUI:N - No victim interaction is required; the attacker directly drives the vulnerable flush path with their own write and TCOFLUSH/tcdrain calls on the serial device they already control.\nS:C - The flawed stop path unmaps the TX DMA buffer while the GENI engine can still read it and without resetting the TX DMA FSM, crossing the kernel/DMA hardware memory boundary and allowing the device to access host memory outside the intended mapping.\nC:H - Stale page-sized DMA retransmissions can leak residual kernel data from the UART xmit buffer and adjacent heap, and post-unmap DMA reads can expose arbitrary remapped physical memory to the serial line or driver state.\nI:H - Missing flush handling leaves tx_remaining/tx_dma_addr inconsistent with a reset kfifo, enabling kfifo pointer underflow and uncontrolled DMA from wrong offsets that corrupt kernel memory and driver bookkeeping.\nA:H - The UART enters an infinite loop of corrupted TX DMA frames and tcdrain/tty_wait_until_sent never completes, causing permanent hang of processes draining the port and sustained denial of the serial subsystem."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: fix use-after-free in fib_nhc_update_mtu()\n\nfib_nhc_update_mtu() walks the nexthop exception table under RTNL, but\nRTNL does not serialize this walk with PMTU exception updates. The walk\nuses rcu_dereference_protected() with a constant true condition without\nholding fnhe_lock.\n\nThe following interleaving can therefore occur:\n\n  CPU 0                              CPU 1\n  fib_nhc_update_mtu()               update_or_create_fnhe()\n    load fnhe                          spin_lock_bh(\u0026fnhe_lock)\n                                       fnhe_remove_oldest()\n                                         unlink fnhe\n                                         kfree_rcu(fnhe, rcu)\n    \u003cquiescent state\u003e\n    access fnhe after grace period\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in fib_nhc_update_mtu+0x3df/0x410\n  Read of size 8 at addr ffff888107d49000 by task poc/90\n  Call Trace:\n   fib_nhc_update_mtu+0x3df/0x410\n   fib_sync_mtu+0x7a/0xd0\n   fib_netdev_event+0x229/0x3f0\n   netif_set_mtu_ext+0x33a/0x570\n   dev_set_mtu+0x88/0x120\n\nThe same walk updates fnhe_pmtu and fnhe_mtu_locked. These fields form a\npair and other writers serialize them with fnhe_lock. RCU alone prevents\nreclamation, but would still allow concurrent writers to leave a mixed\npair.\n\nWalk the table under RCU and acquire fnhe_lock only while updating each\nexception. RCU keeps the current entry alive while the short critical\nsection serializes its paired PMTU fields. This avoids holding the global\nlock while scanning all 2048 buckets for every nexthop."
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              "value": "AV:L - The UAF is hit in fib_nhc_update_mtu(), entered only via NETDEV_CHANGEMTU from dev_set_mtu()/netif_set_mtu_ext() (SIOCSIFMTU or RTM_NEWLINK IFLA_MTU); per kernel CNA guidance this administrative netdev path is Local even though the racing update_or_create_fnhe() leg is driven by received ICMP PMTU packets.\nAC:L - KASAN reproduced this from task poc/90 by racing dev_set_mtu() against concurrent PMTU exception creation/eviction; an attacker controls both CPUs by running an MTU-change thread alongside ICMP or socket traffic that floods update_or_create_fnhe() and fnhe_remove_oldest(), without depending on uncontrollable victim state.\nPR:L - Changing interface MTU requires CAP_NET_ADMIN checked via ns_capable(net-\u003euser_ns, CAP_NET_ADMIN) on SIOCSIFMTU and RTM_SETLINK; unprivileged local users obtain this in a user+network namespace (unshare -Urn) and can then race MTU changes against PMTU exception updates on the same host.\nUI:N - Exploitation requires only the attacker\u0027s own MTU ioctl/netlink operations and concurrent network or socket traffic to populate/evict fib_nh_exception entries; no victim mount, click, or other voluntary action is needed beyond normal host networking.\nS:U - The slab use-after-free corrupts host kernel IPv4 routing state within the same kernel security authority; it is not a VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - KASAN reported a slab use-after-free read of 8 bytes in fib_nhc_update_mtu() on a fib_nh_exception freed by kfree_rcu() from fnhe_remove_oldest(); UAF on this kmalloc object enables heap grooming for arbitrary kernel memory disclosure.\nI:H - The buggy walk both reads and writes fnhe_pmtu and fnhe_mtu_locked on potentially freed fib_nh_exception objects without fnhe_lock, providing standard slab reuse primitives for attacker-controlled kernel writes and potential control-flow hijack.\nA:H - The confirmed KASAN slab-use-after-free in fib_nhc_update_mtu() can immediately BUG/oops the kernel; the attacker can retrigger the race by repeating MTU toggles concurrent with PMTU exception flooding for persistent denial of service."
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        {
          "url": "https://git.kernel.org/stable/c/bc5bde9ce3cc36502839dfe98e068f7303a50982"
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      "title": "ipv4: fix use-after-free in fib_nhc_update_mtu()",
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