CVE-2024-36916blk-iocost: avoid out of bounds shift
Updated under an hour ago ()
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It affects Linux and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: blk-iocost: avoid out of bounds shift UBSAN catches undefined behavior in blk-iocost, where sometimes iocg->delay is shifted right by a number that is too large, resulting in undefined behavior on some architectures. [ 186.556576] ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in block/blk-iocost.c:1366:23 shift exponent 64 is too large for 64-bit type 'u64' (aka 'unsigned long long') CPU: 16 PID: 0 Comm: swapper/16 Tainted: G S E N 6.9.0-0_fbk700_debug_rc2_kbuilder_0_gc85af715cac0 #1 Hardware name: Quanta Twin Lakes MP/Twin Lakes Passive MP, BIOS F09_3A23 12/08/2020 Call Trace: <IRQ> dump_stack_lvl+0x8f/0xe0 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 iocg_kick_delay+0x30b/0x310 ioc_timer_fn+0x2fb/0x1f80 __run_timer_base+0x1b6/0x250 ... Avoid that undefined behavior by simply taking the "delay = 0" branch if the shift is too large. I am not sure what the symptoms of an undefined value delay will be, but I suspect it could be more than a little annoying to debug.
- CVSS
- 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 5160a5a53c0c4ae3708959d9465ea43ad5d90542 builds before 62accf6c1d7b433752cb3591bba8967b7a801ad5; 5160a5a53c0c4ae3708959d9465ea43ad5d90542 builds before 844fc023e9f14a4fb1de5ae1eaefafd6d69c5fa1; from 5160a5a53c0c4ae3708959d9465ea43ad5d90542 before f6add0a6f78dc6360b822ca4b6f9f2f14174c8ca; from 5160a5a53c0c4ae3708959d9465ea43ad5d90542 before ce0e99cae00e3131872936713b7f55eefd53ab86; 5160a5a53c0c4ae3708959d9465ea43ad5d90542 builds before 488dc6808cb8369685f18cee81e88e7052ac153b; from 5160a5a53c0c4ae3708959d9465ea43ad5d90542 before beaa51b36012fad5a4d3c18b88a617aea7a9b96d | CNA record |
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name) | before V3.1 | CISA ADP |
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name) | all versions not affected | CISA ADP |
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family siemens:scalance_xcm_xrm_xch_xrh_300_family (from the name) | before V3.1 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.10 before 5.10.217; from 5.11 before 5.15.159; from 5.16 before 6.1.91; from 6.2 before 6.6.31; from 6.7 before 6.8.10; 6.9; 6.9; 6.9 | NVD |
debian debian_linux debian:debian_linux | 10.0 | NVD |
References
- https://git.kernel.org/stable/c/62accf6c1d7b433752cb3591bba8967b7a801ad5patch
- https://git.kernel.org/stable/c/844fc023e9f14a4fb1de5ae1eaefafd6d69c5fa1patch
- https://git.kernel.org/stable/c/f6add0a6f78dc6360b822ca4b6f9f2f14174c8capatch
- https://git.kernel.org/stable/c/ce0e99cae00e3131872936713b7f55eefd53ab86patch
- https://git.kernel.org/stable/c/488dc6808cb8369685f18cee81e88e7052ac153bpatch
- https://git.kernel.org/stable/c/beaa51b36012fad5a4d3c18b88a617aea7a9b96dpatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.htmlthird-party-advisory
- https://security.netapp.com/advisory/ntap-20240905-0006/third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.