CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48868 – dmaengine: idxd: Let probe fail when workqueue cannot be enabled
https://notcve.org/view.php?id=CVE-2022-48868
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Let probe fail when workqueue cannot be enabled The workqueue is enabled when the appropriate driver is loaded and disabled when the driver is removed. When the driver is removed it assumes that the workqueue was enabled successfully and proceeds to free allocations made during workqueue enabling. Failure during workqueue enabling does not prevent the driver from being loaded. This is because the error path within drv_enable_wq() returns success unless a second failure is encountered during the error path. By returning success it is possible to load the driver even if the workqueue cannot be enabled and allocations that do not exist are attempted to be freed during driver remove. Some examples of problematic flows: (a) idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq(): In above flow, if idxd_wq_request_irq() fails then idxd_wq_unmap_portal() is called on error exit path, but drv_enable_wq() returns 0 because idxd_wq_disable() succeeds. The driver is thus loaded successfully. idxd_dmaengine_drv_remove()->drv_disable_wq()->idxd_wq_unmap_portal() Above flow on driver unload triggers the WARN in devm_iounmap() because the device resource has already been removed during error path of drv_enable_wq(). (b) idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq(): In above flow, if idxd_wq_request_irq() fails then idxd_wq_init_percpu_ref() is never called to initialize the percpu counter, yet the driver loads successfully because drv_enable_wq() returns 0. idxd_dmaengine_drv_remove()->__idxd_wq_quiesce()->percpu_ref_kill(): Above flow on driver unload triggers a BUG when attempting to drop the initial ref of the uninitialized percpu ref: BUG: kernel NULL pointer dereference, address: 0000000000000010 Fix the drv_enable_wq() error path by returning the original error that indicates failure of workqueue enabling. • https://git.kernel.org/stable/c/1f2bb40337f0df1d9af80793e9fdacff7706e654 https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7 https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960 https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-43882 – exec: Fix ToCToU between perm check and set-uid/gid usage
https://notcve.org/view.php?id=CVE-2024-43882
In the Linux kernel, the following vulnerability has been resolved: exec: Fix ToCToU between perm check and set-uid/gid usage When opening a file for exec via do_filp_open(), permission checking is done against the file's metadata at that moment, and on success, a file pointer is passed back. Much later in the execve() code path, the file metadata (specifically mode, uid, and gid) is used to determine if/how to set the uid and gid. However, those values may have changed since the permissions check, meaning the execution may gain unintended privileges. For example, if a file could change permissions from executable and not set-id: ---------x 1 root root 16048 Aug 7 13:16 target to set-id and non-executable: ---S------ 1 root root 16048 Aug 7 13:16 target it is possible to gain root privileges when execution should have been disallowed. While this race condition is rare in real-world scenarios, it has been observed (and proven exploitable) when package managers are updating the setuid bits of installed programs. Such files start with being world-executable but then are adjusted to be group-exec with a set-uid bit. For example, "chmod o-x,u+s target" makes "target" executable only by uid "root" and gid "cdrom", while also becoming setuid-root: -rwxr-xr-x 1 root cdrom 16048 Aug 7 13:16 target becomes: -rwsr-xr-- 1 root cdrom 16048 Aug 7 13:16 target But racing the chmod means users without group "cdrom" membership can get the permission to execute "target" just before the chmod, and when the chmod finishes, the exec reaches brpm_fill_uid(), and performs the setuid to root, violating the expressed authorization of "only cdrom group members can setuid to root". Re-check that we still have execute permissions in case the metadata has changed. • https://git.kernel.org/stable/c/d5c3c7e26275a2d83b894d30f7582a42853a958f https://git.kernel.org/stable/c/368f6985d46657b8b466a421dddcacd4051f7ada https://git.kernel.org/stable/c/15469d46ba34559bfe7e3de6659115778c624759 https://git.kernel.org/stable/c/9b424c5d4130d56312e2a3be17efb0928fec4d64 https://git.kernel.org/stable/c/f6cfc6bcfd5e1cf76115b6450516ea4c99897ae1 https://git.kernel.org/stable/c/d2a2a4714d80d09b0f8eb6438ab4224690b7121e https://git.kernel.org/stable/c/90dfbba89ad4f0d9c9744ecbb1adac4aa2ff4f3e https://git.kernel.org/stable/c/f50733b45d865f91db90919f8311e2127 •
CVSS: 4.7EPSS: 0%CPEs: 7EXPL: 0CVE-2024-43880 – mlxsw: spectrum_acl_erp: Fix object nesting warning
https://notcve.org/view.php?id=CVE-2024-43880
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_erp: Fix object nesting warning ACLs in Spectrum-2 and newer ASICs can reside in the algorithmic TCAM (A-TCAM) or in the ordinary circuit TCAM (C-TCAM). The former can contain more ACLs (i.e., tc filters), but the number of masks in each region (i.e., tc chain) is limited. In order to mitigate the effects of the above limitation, the device allows filters to share a single mask if their masks only differ in up to 8 consecutive bits. For example, dst_ip/25 can be represented using dst_ip/24 with a delta of 1 bit. The C-TCAM does not have a limit on the number of masks being used (and therefore does not support mask aggregation), but can contain a limited number of filters. The driver uses the "objagg" library to perform the mask aggregation by passing it objects that consist of the filter's mask and whether the filter is to be inserted into the A-TCAM or the C-TCAM since filters in different TCAMs cannot share a mask. The set of created objects is dependent on the insertion order of the filters and is not necessarily optimal. Therefore, the driver will periodically ask the library to compute a more optimal set ("hints") by looking at all the existing objects. When the library asks the driver whether two objects can be aggregated the driver only compares the provided masks and ignores the A-TCAM / C-TCAM indication. • https://git.kernel.org/stable/c/9069a3817d82b01b3a55da382c774e3575946130 https://git.kernel.org/stable/c/4dc09f6f260db3c4565a4ec52ba369393598f2fb https://git.kernel.org/stable/c/36a9996e020dd5aa325e0ecc55eb2328288ea6bb https://git.kernel.org/stable/c/9a5261a984bba4f583d966c550fa72c33ff3714e https://git.kernel.org/stable/c/25c6fd9648ad05da493a5d30881896a78a08b624 https://git.kernel.org/stable/c/0e59c2d22853266704e127915653598f7f104037 https://git.kernel.org/stable/c/fb5d4fc578e655d113f09565f6f047e15f7ab578 https://git.kernel.org/stable/c/97d833ceb27dc19f8777d63f90be4a27b • CWE-284: Improper Access Control •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-43879 – wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he()
https://notcve.org/view.php?id=CVE-2024-43879
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: handle 2x996 RU allocation in cfg80211_calculate_bitrate_he() Currently NL80211_RATE_INFO_HE_RU_ALLOC_2x996 is not handled in cfg80211_calculate_bitrate_he(), leading to below warning: kernel: invalid HE MCS: bw:6, ru:6 kernel: WARNING: CPU: 0 PID: 2312 at net/wireless/util.c:1501 cfg80211_calculate_bitrate_he+0x22b/0x270 [cfg80211] Fix it by handling 2x996 RU allocation in the same way as 160 MHz bandwidth. • https://git.kernel.org/stable/c/c4cbaf7973a794839af080f13748335976cf3f3f https://git.kernel.org/stable/c/45d20a1c54be4f3173862c7b950d4468447814c9 https://git.kernel.org/stable/c/b289ebb0516526cb4abae081b7ec29fd4fa1209d https://git.kernel.org/stable/c/2e201b3d162c6c49417c438ffb30b58c9f85769f https://git.kernel.org/stable/c/576c64622649f3ec07e97bac8fec8b8a2ef4d086 https://git.kernel.org/stable/c/16ad67e73309db0c20cc2a651992bd01c05e6b27 https://git.kernel.org/stable/c/67b5f1054197e4f5553047759c15c1d67d4c8142 https://git.kernel.org/stable/c/19eaf4f2f5a981f55a265242ada2bf92b • CWE-99: Improper Control of Resource Identifiers ('Resource Injection') •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-43873 – vhost/vsock: always initialize seqpacket_allow
https://notcve.org/view.php?id=CVE-2024-43873
In the Linux kernel, the following vulnerability has been resolved: vhost/vsock: always initialize seqpacket_allow There are two issues around seqpacket_allow: 1. seqpacket_allow is not initialized when socket is created. Thus if features are never set, it will be read uninitialized. 2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared, then seqpacket_allow will not be cleared appropriately (existing apps I know about don't usually do this but it's legal and there's no way to be sure no one relies on this). To fix: - initialize seqpacket_allow after allocation - set it unconditionally in set_features • https://git.kernel.org/stable/c/ced7b713711fdd8f99d8d04dc53451441d194c60 https://git.kernel.org/stable/c/ea558f10fb05a6503c6e655a1b7d81fdf8e5924c https://git.kernel.org/stable/c/3062cb100787a9ddf45de30004b962035cd497fb https://git.kernel.org/stable/c/30bd4593669443ac58515e23557dc8cef70d8582 https://git.kernel.org/stable/c/eab96e8716cbfc2834b54f71cc9501ad4eec963b https://git.kernel.org/stable/c/1e1fdcbdde3b7663e5d8faeb2245b9b151417d22 •