CVE-2026-64297
CVE CVE-2026-64297EUVD EUVD-2026-49009Published 2026-07-25T08:49:34.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: module: decompress: check return value of module_extend_max_pages() module_extend_max_pages() calls kvrealloc() internally and returns -ENOMEM on allocation failure. The return value is never checked. If the initial allocation fails, info->pages remains NULL and info->max_pages remains 0. Subsequent calls to module_get_next_page() will attempt to dynamically grow the array by calling module_extend_max_pages(info, 0) since info->used_pages is 0. This results in kvrealloc(NULL, 0) returning ZERO_SIZE_PTR, which is treated as a success, leading to a dereference of ZERO_SIZE_PTR and a kernel oops. Fix: add the missing error check after module_extend_max_pages() and return immediately on failure. This matches the pattern used by every other kvrealloc() caller in the module loading path. [Sami: Corrected the analysis in the commit message.]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <e7f174715f9f0cbcb9e87b52e4fc4ef149baac98; patch: 7.1.4; b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <168072baf9ad516d5a06046514c7fea4c0671990; patch: 6.18.39; b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <afcc0515bbdd28d509a2b5870faaa89b137f5d53; 5.17; patch: 6.1.178; b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <786d2d84416a9a1c1a47b71a68d679d886284be2; patch: 6.6.145; patch: 6.12.96; patch: 7.2-rc1; b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <a82e170637e050a803b4f37542371ef216bf66d2; b1ae6dc41eaaa98bb75671e0f3665bfda248c3e7 <e7da02659c229f73492fb1ed87ceda4090153aaa; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
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- Linux — Linux
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