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CVE-2026-45984: Linux, друго

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in iomap inline data write path The inline data buffer head (dibh) is being released prematurely in gfs2_iomap_begin() via release_metapath() while iomap->inline_data still points to dibh->b_data. This causes a use-after-free when iomap_write_end_inline() later attempts to write to the inline data area. The bug sequence: 1. gfs2_iomap_begin() calls gfs2_meta_inode_buffer() to read inode metadata into dibh 2. Sets iomap->inline_data = dibh->b_data + sizeof(struct gfs2_dinode) 3. Calls release_metapath() which calls brelse(dibh), dropping refcount to 0 4. kswapd reclaims the page (~39ms later in the syzbot report) 5. iomap_write_end_inline() tries to memcpy() to iomap->inline_data 6. KASAN detects use-after-free write to freed memory Fix by storing dibh in iomap->private and incrementing its refcount with get_bh() in gfs2_iomap_begin(). The buffer is then properly released in gfs2_iomap_end() after the inline write completes, ensuring the page stays alive for the entire iomap operation. Note: A C reproducer is not available for this issue. The fix is based on analysis of the KASAN report and code review showing the buffer head is freed before use. [agruenba: Take buffer head reference in gfs2_iomap_begin() to avoid leaks in gfs2_iomap_get() and gfs2_iomap_alloc().]

Засегнати продукти

  • Linux Linux: d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 1403989d1b502f4a2c0d0b42ccf1c25748442eff; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 1cae1bafdf9caa9b462b19af06b1a06902e4e142; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 764c3c84b5683e608f43735c803a5f415046686c; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди d87268326b277af3665237ac76a73dd9fa8e21b4; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 87d4954b5c59735a99ea98cb208d47130f6dce7d; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 6d76febba07c40bcf358f63216d36ea68cf1c215; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди 815ddd27c0c7171a99fe802fdb19098ddef8b19d; d0a22a4b03b8475b7aa3fa41243c26c291407844 преди faddeb848305e79db89ee0479bb0e33380656321
  • Linux Linux: 5.2; преди 5.2; 5.10.252 до 5.10.*; 5.15.202 до 5.15.*; 6.1.165 до 6.1.*; 6.6.128 до 6.6.*; 6.12.75 до 6.12.*; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; от 7.0 нататък
  • Red Hat: още 14 продукта, добавени от Red Hat

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux for NVIDIA 26, Red Hat OpenShift Container Platform 4

Вид слабост

История

  • 27 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-45984: Linux, друго | freedomonline.bg