Description
In the Linux kernel, the following vulnerability has been resolved: efi/capsule-loader: fix incorrect sizeof in phys array reallocation The krealloc() call for cap_info->phys in __efi_capsule_setup_info() uses sizeof(phys_addr_t *) instead of sizeof(phys_addr_t), which might be causing an undersized allocation. The allocation is also inconsistent with the initial array allocation in efi_capsule_open() that allocates one entry with sizeof(phys_addr_t), and the efi_capsule_write() function that stores phys_addr_t values (not pointers) via page_to_phys(). On 64-bit systems where sizeof(phys_addr_t) == sizeof(phys_addr_t *), this goes unnoticed. On 32-bit systems with PAE where phys_addr_t is 64-bit but pointers are 32-bit, this allocates half the required space, which might lead to a heap buffer overflow when storing physical addresses. This is similar to the bug fixed in commit fccfa646ef36 ("efi/capsule-loader: fix incorrect allocation size") which fixed the same issue at the initial allocation site.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | f24c4d478013d82bd1b943df566fff3561d52864 to <22022cd8851703a58f67615a17bc7e9e8682785b; f24c4d478013d82bd1b943df566fff3561d52864 to <67adde6bfdfd563a54b045d59aeb9a2d90c80697; f24c4d478013d82bd1b943df566fff3561d52864 to <608e1f7bc9d171ab26c1fba288c97fc76363c27d; f24c4d478013d82bd1b943df566fff3561d52864 to <8be69e9245f805566bac68ffc8574b64735fd996; f24c4d478013d82bd1b943df566fff3561d52864 to <5e185330d902b12fe8e6eb4b8514b5d736d8d66d; f24c4d478013d82bd1b943df566fff3561d52864 to <e0e6b14995fd6fa2c0df8c712d76ab32f0694c31; f24c4d478013d82bd1b943df566fff3561d52864 to <ab3f7098a3a27175b91cfc947950f5c26855801b; f24c4d478013d82bd1b943df566fff3561d52864 to <48a428215782321b56956974f23593e40ce84b7a; 95a362c9a6892085f714eb6e31eea6a0e3aa93bf; 4.14.13 to <4.15 |
| Linux | Linux | 4.15; 0 to <4.15; 5.10.258 to <=5.10.*; 5.15.209 to <=5.15.*; 6.1.175 to <=6.1.*; 6.6.141 to <=6.6.*; 6.12.91 to <=6.12.*; 6.18.33 to <=6.18.*; 7.0.10 to <=7.0.*; 7.1 to <=* |
References
- https://git.kernel.org/stable/c/22022cd8851703a58f67615a17bc7e9e8682785b
- https://git.kernel.org/stable/c/67adde6bfdfd563a54b045d59aeb9a2d90c80697
- https://git.kernel.org/stable/c/608e1f7bc9d171ab26c1fba288c97fc76363c27d
- https://git.kernel.org/stable/c/8be69e9245f805566bac68ffc8574b64735fd996
- https://git.kernel.org/stable/c/5e185330d902b12fe8e6eb4b8514b5d736d8d66d
- https://git.kernel.org/stable/c/e0e6b14995fd6fa2c0df8c712d76ab32f0694c31
- https://git.kernel.org/stable/c/ab3f7098a3a27175b91cfc947950f5c26855801b
- https://git.kernel.org/stable/c/48a428215782321b56956974f23593e40ce84b7a
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.