CentOS Linux 8 [TuxCare] 安全性更新：bpftool / kernel / kernel-core / kernel-cross-headers / etc多個漏洞 （CENTOS-STREAM8：CLSA-2026：1782375682）
high Nessus Plugin ID 361917
語言:
概要
CentOS Linux 主機缺少一個或多個安全性更新。說明
CentOS Linux 8 主機已安裝的套件會受到 TuxCare CENTOS-STREAM8：CLSA-2026：1782375682 公告中提及的多個弱點影響。- 已解決 Linux 核心中的下列弱點：bpf: Don't redirect packets with invalid pkt_len Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any skbs, that is, the flow->head is null. The root cause, as the [2] says, is because that bpf_prog_test_run_skb() run a bpf prog which redirects empty skbs. So we should determine whether the length of the packet modified by bpf prog or others like bpf_prog_test is valid before forwarding it directly. (CVE-2022-49975)
- 已解決 Linux 核心中的下列弱點：ASoC: SOF: debug: Fix potential buffer overflow by snprintf() snprintf() returns the would-be-filled size when the string overflows the given buffer size, hence using this value may result in the buffer overflow (although it's unrealistic). This patch replaces with a safer version, scnprintf() for papering over such a potential issue.
(CVE-2022-50051)
- 已解決 Linux 核心中的下列弱點：ext4: fix use-after-free in ext4_orphan_cleanup I caught a issue as follows:
================================================================== BUG: KASAN: use-after-free in
__list_add_valid+0x28/0x1a0 Read of size 8 at addr ffff88814b13f378 by task mount/710 CPU: 1 PID: 710 Comm: mount Not tainted 6.1.0-rc3-next #370 Call Trace: <TASK> dump_stack_lvl+0x73/0x9f print_report+0x25d/0x759 kasan_report+0xc0/0x120 __asan_load8+0x99/0x140 __list_add_valid+0x28/0x1a0 ext4_orphan_cleanup+0x564/0x9d0 [ext4] __ext4_fill_super+0x48e2/0x5300 [ext4] ext4_fill_super+0x19f/0x3a0 [ext4] get_tree_bdev+0x27b/0x450 ext4_get_tree+0x19/0x30 [ext4] vfs_get_tree+0x49/0x150 path_mount+0xaae/0x1350 do_mount+0xe2/0x110 __x64_sys_mount+0xf0/0x190 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK> [...] ================================================================== Above issue may happen as follows:
------------------------------------- ext4_fill_super ext4_orphan_cleanup --- loop1: assume last_orphan is 12 --- list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan) ext4_truncate --> return 0 ext4_inode_attach_jinode --> return -ENOMEM iput(inode) --> free inode<12> --- loop2: last_orphan is still 12 --- list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); // use inode<12> and trigger UAF To solve this issue, we need to propagate the return value of ext4_inode_attach_jinode() appropriately.
(CVE-2022-50673)
- 已解決 Linux 核心中的下列弱點：x86/alternatives: Disable KASAN in apply_alternatives() Fei has reported that KASAN triggers during apply_alternatives() on a 5-level paging machine: BUG: KASAN: out-of-bounds in rcu_is_watching() Read of size 4 at addr ff110003ee6419a0 by task swapper/0/0 ... __asan_load4() rcu_is_watching() trace_hardirqs_on() text_poke_early() apply_alternatives() ... On machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57) gets patched. It includes KASAN code, where KASAN_SHADOW_START depends on __VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled(). KASAN gets confused when apply_alternatives() patches the KASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START static, by replacing
__VIRTUAL_MASK_SHIFT with 56, works around the issue. Fix it for real by disabling KASAN while the kernel is patching alternatives. [ mingo: updated the changelog ] (CVE-2023-52504)
- 已解決 Linux 核心中的下列弱點：drm/amd: Fix UBSAN array-index-out-of-bounds for SMU7 For pptable structs that use flexible array sizes, use flexible arrays. (CVE-2023-52818)
請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。
解決方案
根據 TuxCare 公告 CENTOS-STREAM8：CLSA-2026：1782375682 中的指引更新受影響的套件。另請參閱
Plugin 詳細資訊
嚴重性: High
ID: 361917
檔案名稱: tuxcare_centos_8_CLSA-2026-1782375682.nasl
版本: 1.3
類型: Local
代理程式: unix
已發布: 2026/10/1
已更新: 2026/10/19
支援的感應器: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
風險資訊
VPR
風險因素: High
分數: 7.9
百分位數: 99.35
Vendor
Vendor Severity: Important
CVSS v2
風險因素: Medium
基本分數: 6.8
時間性分數: 5.6
媒介: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS 評分資料來源: CVE-2026-43027
CVSS v3
風險因素: High
基本分數: 7.8
時間性分數: 7.2
媒介: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
時間媒介: CVSS:3.0/E:F/RL:O/RC:C
弱點資訊
必要的 KB 項目: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party
可被惡意程式利用: true
可輕鬆利用: Exploits are available
修補程式發佈日期: 2026/6/25
弱點發布日期: 2021/7/21
可惡意利用
Core Impact
參考資訊
CVE: CVE-2022-49975, CVE-2022-50051, CVE-2022-50673, CVE-2023-52504, CVE-2023-52818, CVE-2023-53117, CVE-2023-53619, CVE-2025-38361, CVE-2025-68366, CVE-2025-71082, CVE-2025-71091, CVE-2026-23099, CVE-2026-23191, CVE-2026-23243, CVE-2026-23270, CVE-2026-23455, CVE-2026-31405, CVE-2026-31532, CVE-2026-31581, CVE-2026-31685, CVE-2026-43027, CVE-2026-43110, CVE-2026-43158, CVE-2026-43190, CVE-2026-43370, CVE-2026-46331
CLSA: 2026:1782375682