Description

In the Linux kernel, the following vulnerability has been resolved:

block: fix integer overflow in BLKSECDISCARD

I independently rediscovered

commit 22d24a544b0d49bbcbd61c8c0eaf77d3c9297155
block: fix overflow in blk_ioctl_discard()

but for secure erase.

Same problem:

uint64_t r[2] = {512, 18446744073709551104ULL};
ioctl(fd, BLKSECDISCARD, r);

will enter near infinite loop inside blkdev_issue_secure_erase():

a.out: attempt to access beyond end of device
loop0: rw=5, sector=3399043073, nr_sectors = 1024 limit=2048
bio_check_eod: 3286214 callbacks suppressed

Classification

CVE ID: CVE-2024-49994

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.0% (scored less or equal to compared to others)

EPSS Date: 2025-03-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/8476f8428e8b48fd7a0e4258fa2a96a8f4468239
https://git.kernel.org/stable/c/a99bacb35c1416355eef957560e8fcac3a665549
https://git.kernel.org/stable/c/0842ddd83939eb4db940b9af7d39e79722bc41aa
https://git.kernel.org/stable/c/6c9915fa9410cbb9bd75ee283c03120046c56d3d
https://git.kernel.org/stable/c/697ba0b6ec4ae04afb67d3911799b5e2043b4455

Timeline