CVE-2026-22979— 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skb_segment_list存在内存泄漏，可能导致内存泄漏。
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2eeab8c47c3c0276e0746bc382f405c9a236a5ad< 0b27828ebd1ed3107d7929c3737adbe862e99e74 |
affected |
fc126c1d51e9552eacd2d717b9ffe9262a8a4cd6< 88bea149db2057112af3aaf63534b24fab5858ab |
affected | ||
ed4cccef64c1d0d5b91e69f7a8a6697c3a865486< 3264881431e308b9c72cb8a0159d57a56d67dd79 |
affected | ||
ed4cccef64c1d0d5b91e69f7a8a6697c3a865486< c114a32a2e70b82d447f409f7ffcfa3058f9d5bd |
affected | ||
ed4cccef64c1d0d5b91e69f7a8a6697c3a865486< 238e03d0466239410b72294b79494e43d4fabe77 |
affected | ||
d225b0ac96dc40d7e8ae2bc227eb2c56e130975f |
affected | ||
5b3b67f731296027cceb3efad881ae281213f86f |
affected | ||
6.1.85< 6.1.161 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-22979 基础信息
漏洞信息
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Vulnerability Title
net: fix memory leak in skb_segment_list for GRO packets
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: fix memory leak in skb_segment_list for GRO packets
When skb_segment_list() is called during packet forwarding, it handles
packets that were aggregated by the GRO engine.
Historically, the segmentation logic in skb_segment_list assumes that
individual segments are split from a parent SKB and may need to carry
their own socket memory accounting. Accordingly, the code transfers
truesize from the parent to the newly created segments.
Prior to commit ed4cccef64c1 ("gro: fix ownership transfer"), this
truesize subtraction in skb_segment_list() was valid because fragments
still carry a reference to the original socket.
However, commit ed4cccef64c1 ("gro: fix ownership transfer") changed
this behavior by ensuring that fraglist entries are explicitly
orphaned (skb->sk = NULL) to prevent illegal orphaning later in the
stack. This change meant that the entire socket memory charge remained
with the head SKB, but the corresponding accounting logic in
skb_segment_list() was never updated.
As a result, the current code unconditionally adds each fragment's
truesize to delta_truesize and subtracts it from the parent SKB. Since
the fragments are no longer charged to the socket, this subtraction
results in an effective under-count of memory when the head is freed.
This causes sk_wmem_alloc to remain non-zero, preventing socket
destruction and leading to a persistent memory leak.
The leak can be observed via KMEMLEAK when tearing down the networking
environment:
unreferenced object 0xffff8881e6eb9100 (size 2048):
comm "ping", pid 6720, jiffies 4295492526
backtrace:
kmem_cache_alloc_noprof+0x5c6/0x800
sk_prot_alloc+0x5b/0x220
sk_alloc+0x35/0xa00
inet6_create.part.0+0x303/0x10d0
__sock_create+0x248/0x640
__sys_socket+0x11b/0x1d0
Since skb_segment_list() is exclusively used for SKB_GSO_FRAGLIST
packets constructed by GRO, the truesize adjustment is removed.
The call to skb_release_head_state() must be preserved. As documented in
commit cf673ed0e057 ("net: fix fraglist segmentation reference count
leak"), it is still required to correctly drop references to SKB
extensions that may be overwritten during __copy_skb_header().
来源: CVE Program / CVE List V5
CVSS Information
N/A
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skb_segment_list存在内存泄漏，可能导致内存泄漏。
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
二、漏洞 CVE-2026-22979 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-01-23 · 共 34 条
| CVE-2026-22984 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71159 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-71145 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22980 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71158 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22988 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71155 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71146 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71161 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22990 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22991 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22992 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71150 | 7.5 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-22989 | Linux kernel 安全漏洞 | |
| CVE-2026-22993 | Linux kernel 安全漏洞 | |
| CVE-2026-22987 | Linux kernel 安全漏洞 | |
| CVE-2026-22986 | Linux kernel 安全漏洞 | |
| CVE-2026-22994 | Linux kernel 安全漏洞 | |
| CVE-2026-22985 | Linux kernel 安全漏洞 | |
| CVE-2026-22995 | Linux kernel 安全漏洞 |
显示前 20 条，共 34 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-22979
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