CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-42306 – udf: Avoid using corrupted block bitmap buffer
https://notcve.org/view.php?id=CVE-2024-42306
In the Linux kernel, the following vulnerability has been resolved: udf: Avoid using corrupted block bitmap buffer When the filesystem block bitmap is corrupted, we detect the corruption while loading the bitmap and fail the allocation with error. However the next allocation from the same bitmap will notice the bitmap buffer is already loaded and tries to allocate from the bitmap with mixed results (depending on the exact nature of the bitmap corruption). Fix the problem by using BH_verified bit to indicate whether the bitmap is valid or not. • https://git.kernel.org/stable/c/7648ea9896b31aff38830d81188f5b7a1773e4a8 https://git.kernel.org/stable/c/4ac54312f623c6d2ca30c36c1ef530c11f5aff64 https://git.kernel.org/stable/c/099bf90d7fc4622da9fd4727f6d318a0f12d10be https://git.kernel.org/stable/c/6ac8f2c8362afd2baa8e7b9c946597589e587d22 https://git.kernel.org/stable/c/1e0d4adf17e7ef03281d7b16555e7c1508c8ed2d https://git.kernel.org/stable/c/f862a9049c3f6e73a5504a1ac10ffd5bc253ab55 https://git.kernel.org/stable/c/4622cc1b6d86013e01c56b60b092b5e4726c8e52 https://git.kernel.org/stable/c/cae9e59cc41683408b70b9ab569f86548 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-42305 – ext4: check dot and dotdot of dx_root before making dir indexed
https://notcve.org/view.php?id=CVE-2024-42305
In the Linux kernel, the following vulnerability has been resolved: ext4: check dot and dotdot of dx_root before making dir indexed Syzbot reports a issue as follows: ============================================ BUG: unable to handle page fault for address: ffffed11022e24fe PGD 23ffee067 P4D 23ffee067 PUD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 PID: 5079 Comm: syz-executor306 Not tainted 6.10.0-rc5-g55027e689933 #0 Call Trace: <TASK> make_indexed_dir+0xdaf/0x13c0 fs/ext4/namei.c:2341 ext4_add_entry+0x222a/0x25d0 fs/ext4/namei.c:2451 ext4_rename fs/ext4/namei.c:3936 [inline] ext4_rename2+0x26e5/0x4370 fs/ext4/namei.c:4214 [...] ============================================ The immediate cause of this problem is that there is only one valid dentry for the block to be split during do_split, so split==0 results in out of bounds accesses to the map triggering the issue. do_split unsigned split dx_make_map count = 1 split = count/2 = 0; continued = hash2 == map[split - 1].hash; ---> map[4294967295] The maximum length of a filename is 255 and the minimum block size is 1024, so it is always guaranteed that the number of entries is greater than or equal to 2 when do_split() is called. But syzbot's crafted image has no dot and dotdot in dir, and the dentry distribution in dirblock is as follows: bus dentry1 hole dentry2 free |xx--|xx-------------|...............|xx-------------|...............| 0 12 (8+248)=256 268 256 524 (8+256)=264 788 236 1024 So when renaming dentry1 increases its name_len length by 1, neither hole nor free is sufficient to hold the new dentry, and make_indexed_dir() is called. In make_indexed_dir() it is assumed that the first two entries of the dirblock must be dot and dotdot, so bus and dentry1 are left in dx_root because they are treated as dot and dotdot, and only dentry2 is moved to the new leaf block. That's why count is equal to 1. Therefore add the ext4_check_dx_root() helper function to add more sanity checks to dot and dotdot before starting the conversion to avoid the above issue. • https://git.kernel.org/stable/c/ac27a0ec112a089f1a5102bc8dffc79c8c815571 https://git.kernel.org/stable/c/b80575ffa98b5bb3a5d4d392bfe4c2e03e9557db https://git.kernel.org/stable/c/19e13b4d7f0303186fcc891aba8d0de7c8fdbda8 https://git.kernel.org/stable/c/42d420517072028fb0eb852c358056b7717ba5aa https://git.kernel.org/stable/c/8afe06ed3be7a874b3cd82ef5f8959aca8d6429a https://git.kernel.org/stable/c/abb411ac991810c0bcbe51c2e76d2502bf611b5c https://git.kernel.org/stable/c/9d241b7a39af192d1bb422714a458982c7cc67a2 https://git.kernel.org/stable/c/cdd345321699042ece4a9d2e70754d239 •
CVSS: -EPSS: 0%CPEs: 12EXPL: 0CVE-2024-42304 – ext4: make sure the first directory block is not a hole
https://notcve.org/view.php?id=CVE-2024-42304
In the Linux kernel, the following vulnerability has been resolved: ext4: make sure the first directory block is not a hole The syzbot constructs a directory that has no dirblock but is non-inline, i.e. the first directory block is a hole. And no errors are reported when creating files in this directory in the following flow. ext4_mknod ... ext4_add_entry // Read block 0 ext4_read_dirblock(dir, block, DIRENT) bh = ext4_bread(NULL, inode, block, 0) if (!bh && (type == INDEX || type == DIRENT_HTREE)) // The first directory block is a hole // But type == DIRENT, so no error is reported. After that, we get a directory block without '.' and '..' but with a valid dentry. This may cause some code that relies on dot or dotdot (such as make_indexed_dir()) to crash. Therefore when ext4_read_dirblock() finds that the first directory block is a hole report that the filesystem is corrupted and return an error to avoid loading corrupted data from disk causing something bad. • https://git.kernel.org/stable/c/3a17ca864baffc0c6f6e8aad525aa4365775a193 https://git.kernel.org/stable/c/4e19d6b65fb4fc42e352ce9883649e049da14743 https://git.kernel.org/stable/c/3f0307b0d2d8b333a6964fc4c820dc86896fd1cf https://git.kernel.org/stable/c/514631c2225c1fd556c799cc1893fb27b0f48f00 https://git.kernel.org/stable/c/7f1f86276515f6816a98f6ca3ef99c827d54642f https://git.kernel.org/stable/c/5021b7a5bdd6bb859eb648c3da71cdd6aae1d133 https://git.kernel.org/stable/c/d81d7e347d1f1f48a5634607d39eb90c161c8afe https://git.kernel.org/stable/c/e02f9941e8c011aa3eafa799def6a134c •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-42303 – media: imx-pxp: Fix ERR_PTR dereference in pxp_probe()
https://notcve.org/view.php?id=CVE-2024-42303
In the Linux kernel, the following vulnerability has been resolved: media: imx-pxp: Fix ERR_PTR dereference in pxp_probe() devm_regmap_init_mmio() can fail, add a check and bail out in case of error. • https://git.kernel.org/stable/c/4e5bd3fdbeb3100d1f120999130afb2a7d41d82a https://git.kernel.org/stable/c/358bc85269d6a359fea597ef9fbb429cd3626e08 https://git.kernel.org/stable/c/5ab6ac4e9e165b0fe8a326308218337007224f05 https://git.kernel.org/stable/c/57e9ce68ae98551da9c161aaab12b41fe8601856 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-42302 – PCI/DPC: Fix use-after-free on concurrent DPC and hot-removal
https://notcve.org/view.php?id=CVE-2024-42302
In the Linux kernel, the following vulnerability has been resolved: PCI/DPC: Fix use-after-free on concurrent DPC and hot-removal Keith reports a use-after-free when a DPC event occurs concurrently to hot-removal of the same portion of the hierarchy: The dpc_handler() awaits readiness of the secondary bus below the Downstream Port where the DPC event occurred. To do so, it polls the config space of the first child device on the secondary bus. If that child device is concurrently removed, accesses to its struct pci_dev cause the kernel to oops. That's because pci_bridge_wait_for_secondary_bus() neglects to hold a reference on the child device. Before v6.3, the function was only called on resume from system sleep or on runtime resume. Holding a reference wasn't necessary back then because the pciehp IRQ thread could never run concurrently. • https://git.kernel.org/stable/c/d0292124bb5787a2f1ab1316509e801ca89c10fb https://git.kernel.org/stable/c/ffe2318405e605f1b3985ce188eff69e6d1d1baa https://git.kernel.org/stable/c/189f856e76f5463f59efb5fc18dcc1692d04c41a https://git.kernel.org/stable/c/53b54ad074de1896f8b021615f65b27f557ce874 https://git.kernel.org/stable/c/0081032082b5b45ca902b3c3d6986cb5cca69ff2 https://git.kernel.org/stable/c/c52f9e1a9eb40f13993142c331a6cfd334d4b91d https://git.kernel.org/stable/c/2c111413f38ca5cf87557cab89f6d82b0e3433e7 https://git.kernel.org/stable/c/f63df70b439bb8331358a306541893bf4 •