CVSS: 7.0EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26923 – af_unix: Fix garbage collector racing against connect()
https://notcve.org/view.php?id=CVE-2024-26923
In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix garbage collector racing against connect() Garbage collector does not take into account the risk of embryo getting enqueued during the garbage collection. If such embryo has a peer that carries SCM_RIGHTS, two consecutive passes of scan_children() may see a different set of children. Leading to an incorrectly elevated inflight count, and then a dangling pointer within the gc_inflight_list. sockets are AF_UNIX/SOCK_STREAM S is an unconnected socket L is a listening in-flight socket bound to addr, not in fdtable V's fd will be passed via sendmsg(), gets inflight count bumped connect(S, addr) sendmsg(S, [V]); close(V) __unix_gc() ---------------- ------------------------- ----------- NS = unix_create1() skb1 = sock_wmalloc(NS) L = unix_find_other(addr) unix_state_lock(L) unix_peer(S) = NS // V count=1 inflight=0 NS = unix_peer(S) skb2 = sock_alloc() skb_queue_tail(NS, skb2[V]) // V became in-flight // V count=2 inflight=1 close(V) // V count=1 inflight=1 // GC candidate condition met for u in gc_inflight_list: if (total_refs == inflight_refs) add u to gc_candidates // gc_candidates={L, V} for u in gc_candidates: scan_children(u, dec_inflight) // embryo (skb1) was not // reachable from L yet, so V's // inflight remains unchanged __skb_queue_tail(L, skb1) unix_state_unlock(L) for u in gc_candidates: if (u.inflight) scan_children(u, inc_inflight_move_tail) // V count=1 inflight=2 (!) If there is a GC-candidate listening socket, lock/unlock its state. This makes GC wait until the end of any ongoing connect() to that socket. • https://git.kernel.org/stable/c/1fd05ba5a2f2aa8e7b9b52ef55df850e2e7d54c9 https://git.kernel.org/stable/c/a36ae0ec2353015f0f6762e59f4c2dbc0c906423 https://git.kernel.org/stable/c/343c5372d5e17b306db5f8f3c895539b06e3177f https://git.kernel.org/stable/c/2e2a03787f4f0abc0072350654ab0ef3324d9db3 https://git.kernel.org/stable/c/e76c2678228f6aec74b305ae30c9374cc2f28a51 https://git.kernel.org/stable/c/b75722be422c276b699200de90527d01c602ea7c https://git.kernel.org/stable/c/507cc232ffe53a352847893f8177d276c3b532a9 https://git.kernel.org/stable/c/dbdf7bec5c920200077d693193f989cb1 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26922 – drm/amdgpu: validate the parameters of bo mapping operations more clearly
https://notcve.org/view.php?id=CVE-2024-26922
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate the parameters of bo mapping operations more clearly Verify the parameters of amdgpu_vm_bo_(map/replace_map/clearing_mappings) in one common place. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdgpu: valide los parámetros de las operaciones de mapeo de bo con mayor claridad. Verifique los parámetros de amdgpu_vm_bo_(map/replace_map/clearing_mappings) en un lugar común. • https://git.kernel.org/stable/c/dc54d3d1744d23ed0b345fd8bc1c493b74e8df44 https://git.kernel.org/stable/c/d4da6b084f1c5625937d49bb6722c5b4aef11b8d https://git.kernel.org/stable/c/f68039375d4d6d67303674c0ab2d06b7295c0ec9 https://git.kernel.org/stable/c/1fd7db5c16028dc07b2ceec190f2e895dddb532d https://git.kernel.org/stable/c/8b12fc7b032633539acdf7864888b0ebd49e90f2 https://git.kernel.org/stable/c/212e3baccdb1939606420d88f7f52d346b49a284 https://git.kernel.org/stable/c/ef13eeca7c79136bc38e21eb67322c1cbd5c40ee https://git.kernel.org/stable/c/b1f04b9b1c5317f562a455384c5f7473e •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26921 – inet: inet_defrag: prevent sk release while still in use
https://notcve.org/view.php?id=CVE-2024-26921
In the Linux kernel, the following vulnerability has been resolved: inet: inet_defrag: prevent sk release while still in use ip_local_out() and other functions can pass skb->sk as function argument. If the skb is a fragment and reassembly happens before such function call returns, the sk must not be released. This affects skb fragments reassembled via netfilter or similar modules, e.g. openvswitch or ct_act.c, when run as part of tx pipeline. Eric Dumazet made an initial analysis of this bug. Quoting Eric: Calling ip_defrag() in output path is also implying skb_orphan(), which is buggy because output path relies on sk not disappearing. A relevant old patch about the issue was : 8282f27449bf ("inet: frag: Always orphan skbs inside ip_defrag()") [..] net/ipv4/ip_output.c depends on skb->sk being set, and probably to an inet socket, not an arbitrary one. If we orphan the packet in ipvlan, then downstream things like FQ packet scheduler will not work properly. We need to change ip_defrag() to only use skb_orphan() when really needed, ie whenever frag_list is going to be used. Eric suggested to stash sk in fragment queue and made an initial patch. However there is a problem with this: If skb is refragmented again right after, ip_do_fragment() will copy head->sk to the new fragments, and sets up destructor to sock_wfree. IOW, we have no choice but to fix up sk_wmem accouting to reflect the fully reassembled skb, else wmem will underflow. This change moves the orphan down into the core, to last possible moment. As ip_defrag_offset is aliased with sk_buff->sk member, we must move the offset into the FRAG_CB, else skb->sk gets clobbered. This allows to delay the orphaning long enough to learn if the skb has to be queued or if the skb is completing the reasm queue. In the former case, things work as before, skb is orphaned. This is safe because skb gets queued/stolen and won't continue past reasm engine. In the latter case, we will steal the skb->sk reference, reattach it to the head skb, and fix up wmem accouting when inet_frag inflates truesize. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: inet: inet_defrag: evita la liberación de sk mientras aún está en uso ip_local_out() y otras funciones pueden pasar skb->sk como argumento de función. Si el skb es un fragmento y el reensamblaje ocurre antes de que regrese dicha llamada a la función, el sk no debe liberarse. • https://git.kernel.org/stable/c/7026b1ddb6b8d4e6ee33dc2bd06c0ca8746fa7ab https://git.kernel.org/stable/c/7d0567842b78390dd9b60f00f1d8f838d540e325 https://git.kernel.org/stable/c/f4877225313d474659ee53150ccc3d553a978727 https://git.kernel.org/stable/c/e09cbe017311508c21e0739e97198a8388b98981 https://git.kernel.org/stable/c/18685451fc4e546fc0e718580d32df3c0e5c8272 https://access.redhat.com/security/cve/CVE-2024-26921 https://bugzilla.redhat.com/show_bug.cgi?id=2275928 • CWE-124: Buffer Underwrite ('Buffer Underflow') •
CVSS: -EPSS: 0%CPEs: 17EXPL: 0CVE-2024-26920 – tracing/trigger: Fix to return error if failed to alloc snapshot
https://notcve.org/view.php?id=CVE-2024-26920
In the Linux kernel, the following vulnerability has been resolved: tracing/trigger: Fix to return error if failed to alloc snapshot Fix register_snapshot_trigger() to return error code if it failed to allocate a snapshot instead of 0 (success). Unless that, it will register snapshot trigger without an error. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: rastreo/activador: Corrección para devolver error si no se pudo asignar la instantánea. Corrección de Register_snapshot_trigger() para devolver código de error si no se pudo asignar una instantánea en lugar de 0 (éxito). A menos que eso, registrará la activación de la instantánea sin error. • https://git.kernel.org/stable/c/57f2a2ad73e99a7594515848f4da987326a15981 https://git.kernel.org/stable/c/0026e356e51ab3b54322eeb445c75a087ede5b9d https://git.kernel.org/stable/c/0bbe7f719985efd9adb3454679ecef0984cb6800 https://git.kernel.org/stable/c/7c6feb347a4bb1f02e55f6814c93b5f7fab887a8 https://git.kernel.org/stable/c/a289fd864722dcf5363fec66a35965d4964df515 https://git.kernel.org/stable/c/7054f86f268c0d9d62b52a4497dd0e8c10a7e5c7 https://git.kernel.org/stable/c/ffa70d104691aa609a18a9a6692049deb35f431f https://git.kernel.org/stable/c/733c611a758c68894a4480fb999637476 •
CVSS: -EPSS: 0%CPEs: 11EXPL: 0CVE-2024-26917 – scsi: Revert "scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock"
https://notcve.org/view.php?id=CVE-2024-26917
In the Linux kernel, the following vulnerability has been resolved: scsi: Revert "scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock" This reverts commit 1a1975551943f681772720f639ff42fbaa746212. This commit causes interrupts to be lost for FCoE devices, since it changed sping locks from "bh" to "irqsave". Instead, a work queue should be used, and will be addressed in a separate commit. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: scsi: Revertir "scsi: fcoe: Reparar posible punto muerto en &fip->ctlr_lock" Esto revierte el commit 1a1975551943f681772720f639ff42fbaa746212. Este commit provoca que se pierdan las interrupciones para los dispositivos FCoE, ya que cambió los bloqueos de sping de "bh" a "irqsave". En su lugar, se debe utilizar una cola de trabajo, que se abordará en un commit separado. • https://git.kernel.org/stable/c/264eae2f523d2aae38188facb4ece893023f25da https://git.kernel.org/stable/c/d2bf25674cea74b865d367d09be5dfe9aff5922a https://git.kernel.org/stable/c/9cce8ef7a6fa858bbcacd8679a5ca5a4fd3a6df3 https://git.kernel.org/stable/c/076fb40cf27ab9232d8cce1f007e663e46705302 https://git.kernel.org/stable/c/5a5fb3b1754fa2b4db95f0151b4af0fb6f8918ec https://git.kernel.org/stable/c/1a1975551943f681772720f639ff42fbaa746212 https://git.kernel.org/stable/c/4ea46b479a00dd232f0dbc81fdc27f9330ecb3ad https://git.kernel.org/stable/c/694ddc5bf35a5b6f9acb6e4724324c910 •