CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-50163 – bpf: Make sure internal and UAPI bpf_redirect flags don't overlap
https://notcve.org/view.php?id=CVE-2024-50163
In the Linux kernel, the following vulnerability has been resolved: bpf: Make sure internal and UAPI bpf_redirect flags don't overlap The bpf_redirect_info is shared between the SKB and XDP redirect paths, and the two paths use the same numeric flag values in the ri->flags field (specifically, BPF_F_BROADCAST == BPF_F_NEXTHOP). This means that if skb bpf_redirect_neigh() is used with a non-NULL params argument and, subsequently, an XDP redirect is performed using the same bpf_redirect_info struct, the XDP path will get confused and end up crashing, which syzbot managed to trigger. With the stack-allocated bpf_redirect_info, the structure is no longer shared between the SKB and XDP paths, so the crash doesn't happen anymore. However, different code paths using identically-numbered flag values in the same struct field still seems like a bit of a mess, so this patch cleans that up by moving the flag definitions together and redefining the three flags in BPF_F_REDIRECT_INTERNAL to not overlap with the flags used for XDP. It also adds a BUILD_BUG_ON() check to make sure the overlap is not re-introduced by mistake. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Asegúrese de que los indicadores bpf_redirect internos y de UAPI no se superpongan El bpf_redirect_info se comparte entre las rutas de redireccionamiento de SKB y XDP, y las dos rutas usan los mismos valores de indicador numérico en el campo ri->flags (específicamente, BPF_F_BROADCAST == BPF_F_NEXTHOP). • https://git.kernel.org/stable/c/e624d4ed4aa8cc3c69d1359b0aaea539203ed266 https://git.kernel.org/stable/c/4e1e428533845d48828bd3875c0e92e8565b9962 https://git.kernel.org/stable/c/314dbee9fe4f5cee36435465de52c988d7caa466 https://git.kernel.org/stable/c/0fca5ed4be8e8bfbfb9bd97845af596bab7192d3 https://git.kernel.org/stable/c/cec288e05ceac9a0d3a3a1fd279534b11844c826 https://git.kernel.org/stable/c/09d88791c7cd888d5195c84733caf9183dcfbd16 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-50162 – bpf: devmap: provide rxq after redirect
https://notcve.org/view.php?id=CVE-2024-50162
In the Linux kernel, the following vulnerability has been resolved: bpf: devmap: provide rxq after redirect rxq contains a pointer to the device from where the redirect happened. Currently, the BPF program that was executed after a redirect via BPF_MAP_TYPE_DEVMAP* does not have it set. This is particularly bad since accessing ingress_ifindex, e.g. SEC("xdp") int prog(struct xdp_md *pkt) { return bpf_redirect_map(&dev_redirect_map, 0, 0); } SEC("xdp/devmap") int prog_after_redirect(struct xdp_md *pkt) { bpf_printk("ifindex %i", pkt->ingress_ifindex); return XDP_PASS; } depends on access to rxq, so a NULL pointer gets dereferenced: <1>[ 574.475170] BUG: kernel NULL pointer dereference, address: 0000000000000000 <1>[ 574.475188] #PF: supervisor read access in kernel mode <1>[ 574.475194] #PF: error_code(0x0000) - not-present page <6>[ 574.475199] PGD 0 P4D 0 <4>[ 574.475207] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI <4>[ 574.475217] CPU: 4 UID: 0 PID: 217 Comm: kworker/4:1 Not tainted 6.11.0-rc5-reduced-00859-g780801200300 #23 <4>[ 574.475226] Hardware name: Intel(R) Client Systems NUC13ANHi7/NUC13ANBi7, BIOS ANRPL357.0026.2023.0314.1458 03/14/2023 <4>[ 574.475231] Workqueue: mld mld_ifc_work <4>[ 574.475247] RIP: 0010:bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c <4>[ 574.475257] Code: cc cc cc cc cc cc cc 80 00 00 00 cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 66 90 55 48 89 e5 f3 0f 1e fa 48 8b 57 20 <48> 8b 52 00 8b 92 e0 00 00 00 48 bf f8 a6 d5 c4 5d a0 ff ff be 0b <4>[ 574.475263] RSP: 0018:ffffa62440280c98 EFLAGS: 00010206 <4>[ 574.475269] RAX: ffffa62440280cd8 RBX: 0000000000000001 RCX: 0000000000000000 <4>[ 574.475274] RDX: 0000000000000000 RSI: ffffa62440549048 RDI: ffffa62440280ce0 <4>[ 574.475278] RBP: ffffa62440280c98 R08: 0000000000000002 R09: 0000000000000001 <4>[ 574.475281] R10: ffffa05dc8b98000 R11: ffffa05f577fca40 R12: ffffa05dcab24000 <4>[ 574.475285] R13: ffffa62440280ce0 R14: ffffa62440549048 R15: ffffa62440549000 <4>[ 574.475289] FS: 0000000000000000(0000) GS:ffffa05f4f700000(0000) knlGS:0000000000000000 <4>[ 574.475294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4>[ 574.475298] CR2: 0000000000000000 CR3: 000000025522e000 CR4: 0000000000f50ef0 <4>[ 574.475303] PKRU: 55555554 <4>[ 574.475306] Call Trace: <4>[ 574.475313] <IRQ> <4>[ 574.475318] ? __die+0x23/0x70 <4>[ 574.475329] ? page_fault_oops+0x180/0x4c0 <4>[ 574.475339] ? skb_pp_cow_data+0x34c/0x490 <4>[ 574.475346] ? • https://git.kernel.org/stable/c/cb261b594b4108668e00f565184c7c221efe0359 https://git.kernel.org/stable/c/fe068afb868660fe683a8391c6c17ecbe2254922 https://git.kernel.org/stable/c/a778fbe087c19f4ece5f5fc14173328f070c3803 https://git.kernel.org/stable/c/49454f09936a9a96edfb047156889879cb4001eb https://git.kernel.org/stable/c/9167d1c274a336e4763eeb3f3f9cb763c55df5aa https://git.kernel.org/stable/c/ca9984c5f0ab3690d98b13937b2485a978c8dd73 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50161 – bpf: Check the remaining info_cnt before repeating btf fields
https://notcve.org/view.php?id=CVE-2024-50161
In the Linux kernel, the following vulnerability has been resolved: bpf: Check the remaining info_cnt before repeating btf fields When trying to repeat the btf fields for array of nested struct, it doesn't check the remaining info_cnt. The following splat will be reported when the value of ret * nelems is greater than BTF_FIELDS_MAX: ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49 index 11 is out of range for type 'btf_field_info [11]' CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Call Trace: <TASK> dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_out_of_bounds+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ...... </TASK> ---[ end trace ]--- Fix it by checking the remaining info_cnt in btf_repeat_fields() before repeating the btf fields. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Verificar el info_cnt restante antes de repetir los campos btf Al intentar repetir los campos btf para una matriz de estructuras anidadas, no verifica el info_cnt restante. • https://git.kernel.org/stable/c/64e8ee814819f21beeeda00d4119221443d77992 https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71 https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1c •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-50160 – ALSA: hda/cs8409: Fix possible NULL dereference
https://notcve.org/view.php?id=CVE-2024-50160
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/cs8409: Fix possible NULL dereference If snd_hda_gen_add_kctl fails to allocate memory and returns NULL, then NULL pointer dereference will occur in the next line. Since dolphin_fixups function is a hda_fixup function which is not supposed to return any errors, add simple check before dereference, ignore the fail. Found by Linux Verification Center (linuxtesting.org) with SVACE. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: hda/cs8409: Se corrige una posible desreferencia de NULL. Si snd_hda_gen_add_kctl no puede asignar memoria y devuelve NULL, se producirá una desreferencia de puntero NULL en la siguiente línea. Dado que la función dolphin_fixups es una función hda_fixup que no debería devolver ningún error, se debe agregar una comprobación simple antes de la desreferencia e ignorar el error. Encontrado por Linux Verification Center (linuxtesting.org) con SVACE. • https://git.kernel.org/stable/c/20e507724113300794f16884e7e7507d9b4dec68 https://git.kernel.org/stable/c/4e19aca8db696b6ba4dd8c73657405e15c695f14 https://git.kernel.org/stable/c/21dc97d5086fdabbe278786bb0a03cbf2e26c793 https://git.kernel.org/stable/c/8971fd61210d75fd2af225621cd2fcc87eb1847c https://git.kernel.org/stable/c/a5dd71a8b849626f42d08a5e73d382f2016fc7bc https://git.kernel.org/stable/c/c9bd4a82b4ed32c6d1c90500a52063e6e341517f •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-50159 – firmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup()
https://notcve.org/view.php?id=CVE-2024-50159
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup() Clang static checker(scan-build) throws below warning： | drivers/firmware/arm_scmi/driver.c:line 2915, column 2 | Attempt to free released memory. When devm_add_action_or_reset() fails, scmi_debugfs_common_cleanup() will run twice which causes double free of 'dbg->name'. Remove the redundant scmi_debugfs_common_cleanup() to fix this problem. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: firmware: arm_scmi: Se corrige la doble liberación en scmi_debugfs_common_setup() El verificador estático de Clang (scan-build) arroja la siguiente advertencia: | drivers/firmware/arm_scmi/driver.c:line 2915, column 2 | Intenta liberar la memoria liberada. Cuando devm_add_action_or_reset() falla, scmi_debugfs_common_cleanup() se ejecutará dos veces, lo que provoca una doble liberación de 'dbg->name'. Elimina el scmi_debugfs_common_cleanup() redundante para solucionar este problema. • https://git.kernel.org/stable/c/c3d4aed763ce4a39f8ed36c7b7cd9a6a35971329 https://git.kernel.org/stable/c/6d91d07913aee90556362d648d6a28a1eda419dc https://git.kernel.org/stable/c/fb324fdaf546bf14bc4c17e0037bca6cb952b121 https://git.kernel.org/stable/c/39b13dce1a91cdfc3bec9238f9e89094551bd428 •