Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds Add bounds checking to prevent writes past framebuffer boundaries when rendering text near screen edges. Return early if the Y position is off-screen and clip image height to screen boundary. Break from the rendering loop if the X position is off-screen. When clipping image width to fit the screen, update the character count to match the clipped width to prevent buffer size mismatches. Without the character count update, bit_putcs_aligned and bit_putcs_unaligned receive mismatched parameters where the buffer is allocated for the clipped width but cnt reflects the original larger count, causing out-of-bounds writes.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 996bfaa7372d6718b6d860bdf78f6618e850c702; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f0982400648a3e00580253e0c48e991f34d2684c; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1943b69e87b0ab35032d47de0a7fca9a3d1d6fc1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ebc0730b490c7f27340b1222e01dd106e820320d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 86df8ade88d290725554cefd03101ecd0fbd3752; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 15ba9acafb0517f8359ca30002c189a68ddbb939; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2d1359e11674ed4274934eac8a71877ae5ae7bbb; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3637d34b35b287ab830e66048841ace404382b67 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.4.302 through 5.4.*; unaffected 5.10.247 through 5.10.*; unaffected 5.15.197 through 5.15.*; unaffected 6.1.159 through 6.1.*; unaffected 6.6.117 through 6.6.*; unaffected 6.12.58 through 6.12.*; unaffected 6.17.8 through 6.17.*; unaffected 6.18 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/996bfaa7372d6718b6d860bdf78f6618e850c702
- https://git.kernel.org/stable/c/f0982400648a3e00580253e0c48e991f34d2684c
- https://git.kernel.org/stable/c/1943b69e87b0ab35032d47de0a7fca9a3d1d6fc1
- https://git.kernel.org/stable/c/ebc0730b490c7f27340b1222e01dd106e820320d
- https://git.kernel.org/stable/c/86df8ade88d290725554cefd03101ecd0fbd3752
- https://git.kernel.org/stable/c/15ba9acafb0517f8359ca30002c189a68ddbb939
- https://git.kernel.org/stable/c/2d1359e11674ed4274934eac8a71877ae5ae7bbb
- https://git.kernel.org/stable/c/3637d34b35b287ab830e66048841ace404382b67
ADP enrichment
No English description supplied.
No references supplied.