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CVE-2024-26924— Linux kernel 安全漏洞

一分钟漏洞结论

影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于元素发生崩溃。

CVSS 7.8 · High EPSS 0.85% · P57

影响版本矩阵 14

厂商产品 版本范围状态
Linux Linux 3c4287f62044a90e73a561aa05fc46e62da173da< e3b887a9c11caf8357a821260e095f2a694a34f2 affected
3c4287f62044a90e73a561aa05fc46e62da173da< 7a1679e2d9bfa3b5f8755c2c7113e54b7d42bd46 affected
3c4287f62044a90e73a561aa05fc46e62da173da< 41d8fdf3afaff312e17466e4ab732937738d5644 affected
3c4287f62044a90e73a561aa05fc46e62da173da< ebf7c9746f073035ee26209e38c3a1170f7b349a affected
3c4287f62044a90e73a561aa05fc46e62da173da< 14b001ba221136c15f894577253e8db535b99487 affected
3c4287f62044a90e73a561aa05fc46e62da173da< 3cfc9ec039af60dbd8965ae085b2c2ccdcfbe1cc affected
5.6 affected
< 5.6 unaffected
… +6 条更多
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一、 漏洞 CVE-2024-26924 基础信息

漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
netfilter: nft_set_pipapo: do not free live element
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: do not free live element Pablo reports a crash with large batches of elements with a back-to-back add/remove pattern. Quoting Pablo: add_elem("00000000") timeout 100 ms ... add_elem("0000000X") timeout 100 ms del_elem("0000000X") <---------------- delete one that was just added ... add_elem("00005000") timeout 100 ms 1) nft_pipapo_remove() removes element 0000000X Then, KASAN shows a splat. Looking at the remove function there is a chance that we will drop a rule that maps to a non-deactivated element. Removal happens in two steps, first we do a lookup for key k and return the to-be-removed element and mark it as inactive in the next generation. Then, in a second step, the element gets removed from the set/map. The _remove function does not work correctly if we have more than one element that share the same key. This can happen if we insert an element into a set when the set already holds an element with same key, but the element mapping to the existing key has timed out or is not active in the next generation. In such case its possible that removal will unmap the wrong element. If this happens, we will leak the non-deactivated element, it becomes unreachable. The element that got deactivated (and will be freed later) will remain reachable in the set data structure, this can result in a crash when such an element is retrieved during lookup (stale pointer). Add a check that the fully matching key does in fact map to the element that we have marked as inactive in the deactivation step. If not, we need to continue searching. Add a bug/warn trap at the end of the function as well, the remove function must not ever be called with an invisible/unreachable/non-existent element. v2: avoid uneeded temporary variable (Stefano)
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于元素发生崩溃。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
Linux Linux 3c4287f62044a90e73a561aa05fc46e62da173da ~ e3b887a9c11caf8357a821260e095f2a694a34f2 -
Linux Linux 5.6 -

二、漏洞 CVE-2024-26924 的公开POC

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三、漏洞 CVE-2024-26924 的情报信息

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CVE-2024-26924 邮件列表归档 (1)

CVE-2024-26924 其他参考 (5)

同批安全公告 · Linux · 2024-04-24 · 共 4 条

CVE-2024-26926 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26925 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26923 7.8 HIGH Linux kernel 安全漏洞

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26924

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