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CVE-2024-49994: block: fix integer overflow in BLKSECDISCARD

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-10-15
• Weakness: CWE-190

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

Affected products

• Linux kernel: before 6.10.14; from 6.11 before 6.11.3 — fixed in 6.10.14, 6.11.3

How to fix

Upgrade to a fixed version: Linux kernel 6.10.14, 6.11.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0842ddd83939eb4db940b9af7d39e79722bc41aa
• https://git.kernel.org/stable/c/697ba0b6ec4ae04afb67d3911799b5e2043b4455
• https://git.kernel.org/stable/c/6c9915fa9410cbb9bd75ee283c03120046c56d3d
• https://git.kernel.org/stable/c/8476f8428e8b48fd7a0e4258fa2a96a8f4468239
• https://git.kernel.org/stable/c/a99bacb35c1416355eef957560e8fcac3a665549
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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