CVSS: 5.5EPSS: 0%CPEs: 6EXPL: 0CVE-2021-47256 – mm/memory-failure: make sure wait for page writeback in memory_failure
https://notcve.org/view.php?id=CVE-2021-47256
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: make sure wait for page writeback in memory_failure Our syzkaller trigger the "BUG_ON(!list_empty(&inode->i_wb_list))" in clear_inode: kernel BUG at fs/inode.c:519! Internal error: Oops - BUG: 0 [#1] SMP Modules linked in: Process syz-executor.0 (pid: 249, stack limit = 0x00000000a12409d7) CPU: 1 PID: 249 Comm: syz-executor.0 Not tainted 4.19.95 Hardware name: linux,dummy-virt (DT) pstate: 80000005 (Nzcv daif -PAN -UAO) p... • https://git.kernel.org/stable/c/0bc1f8b0682caa39f45ce1e0228ebf43acb46111 •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47255 – kvm: LAPIC: Restore guard to prevent illegal APIC register access
https://notcve.org/view.php?id=CVE-2021-47255
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in kvm_lapic_reg_read can result in a leak of kernel stack contents. Prior to commit 01402cf81051 ("kvm: LAPIC: write down valid APIC registers"), such an access was explicitly disallowed. Restore the guard that was removed... • https://git.kernel.org/stable/c/01402cf81051f796dac7c60ca11d6147153ca46a •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47254 – gfs2: Fix use-after-free in gfs2_glock_shrink_scan
https://notcve.org/view.php?id=CVE-2021-47254
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in gfs2_glock_shrink_scan The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() to remove the glock from the lru list in __gfs2_glock_put(). On the shrink scan path, the same flag is cleared under lru_lock but because of cond_resched_lock(&lru_lock) in gfs2_dispose_glock_lru(), progress on the put side can be made without deleting the glock from the lru list. Keep GLF_LRU across the race window ... • https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4 •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47253 – drm/amd/display: Fix potential memory leak in DMUB hw_init
https://notcve.org/view.php?id=CVE-2021-47253
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential memory leak in DMUB hw_init [Why] On resume we perform DMUB hw_init which allocates memory: dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzalloc That results in memory leak in suspend/resume scenarios. [How] Allocate memory for the DC wrapper to DMUB only if it was not allocated before. No need to reallocate it on suspend/resume. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/dis... • https://git.kernel.org/stable/c/9e8c2af010463197315fa54a6c17e74988b5259c •
CVSS: 0EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47252 – batman-adv: Avoid WARN_ON timing related checks
https://notcve.org/view.php?id=CVE-2021-47252
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: batman-adv: Avoid WARN_ON timing related checks The soft/batadv interface for a queued OGM can be changed during the time the OGM was queued for transmission and when the OGM is actually transmitted by the worker. But WARN_ON must be used to denote kernel bugs and not to print simple warnings. A warning can simply be printed using pr_warn. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: batman-adv: Evite comprobaciones re... • https://git.kernel.org/stable/c/ef0a937f7a1450d3a133ccd83c9c7d07587e7a00 •
CVSS: 9.8EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47251 – mac80211: fix skb length check in ieee80211_scan_rx()
https://notcve.org/view.php?id=CVE-2021-47251
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: mac80211: fix skb length check in ieee80211_scan_rx() Replace hard-coded compile-time constants for header length check with dynamic determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. [style fixes, reword commit message] En el kernel de Linux, se resolvió la siguiente vulnerabilidad: mac80211: corrige la verificación de longitud de skb en ieee80211_scan_rx() Reemplace las constantes de tiempo de... • https://git.kernel.org/stable/c/cd418ba63f0c2f6157f35a41c9accc6ecb52590a •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47250 – net: ipv4: fix memory leak in netlbl_cipsov4_add_std
https://notcve.org/view.php?id=CVE-2021-47250
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: net: ipv4: fix memory leak in netlbl_cipsov4_add_std Reported by syzkaller: BUG: memory leak unreferenced object 0xffff888105df7000 (size 64): comm "syz-executor842", pid 360, jiffies 4294824824 (age 22.546s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000e67ed558>] kmalloc include/linux/slab.h:590 [inline] [<00... • https://git.kernel.org/stable/c/96cb8e3313c7a12e026c1ed510522ae6f6023875 •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47249 – net: rds: fix memory leak in rds_recvmsg
https://notcve.org/view.php?id=CVE-2021-47249
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: net: rds: fix memory leak in rds_recvmsg Syzbot reported memory leak in rds. The problem was in unputted refcount in case of error. int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int msg_flags) { ... if (!rds_next_incoming(rs, &inc)) { ... } After this "if" inc refcount incremented and if (rds_cmsg_recv(inc, msg, rs)) { ret = -EFAULT; goto out; } ... out: return ret; } in case of rds_cmsg_recv() fail the refcount won'... • https://git.kernel.org/stable/c/bdbe6fbc6a2f2ccfb384b141b257677d2a8d36fb •
CVSS: 4.7EPSS: 0%CPEs: 7EXPL: 0CVE-2021-47248 – udp: fix race between close() and udp_abort()
https://notcve.org/view.php?id=CVE-2021-47248
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: udp: fix race between close() and udp_abort() Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions. We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race h... • https://git.kernel.org/stable/c/5d77dca82839ef016a93ad7acd7058b14d967752 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2021-47247 – net/mlx5e: Fix use-after-free of encap entry in neigh update handler
https://notcve.org/view.php?id=CVE-2021-47247
21 May 2024 — In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free of encap entry in neigh update handler Function mlx5e_rep_neigh_update() wasn't updated to accommodate rtnl lock removal from TC filter update path and properly handle concurrent encap entry insertion/deletion which can lead to following use-after-free: [23827.464923] ================================================================== [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5... • https://git.kernel.org/stable/c/2a1f1768fa17805ca2e937e2e034a7c3433d3bdc •