Bug 2320554 (CVE-2024-49994) - CVE-2024-49994 kernel: block: fix integer overflow in BLKSECDISCARD
Summary: CVE-2024-49994 kernel: block: fix integer overflow in BLKSECDISCARD
Keywords:
Status: NEW
Alias: CVE-2024-49994
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2321037
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-10-21 19:10 UTC by OSIDB Bzimport
Modified: 2024-10-24 04:22 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2024-10-21 19:10:23 UTC
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

Comment 2 Avinash Hanwate 2024-10-23 04:21:59 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102138-CVE-2024-49994-de99@gregkh/T


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