Bug 2282569 (CVE-2021-47244)

Summary: CVE-2021-47244 kernel: mptcp: Fix out of bounds when parsing TCP options
Product: [Other] Security Response Reporter: ybuenos
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, trathi, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.10.46, kernel 5.12.13, kernel 5.13 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel's mptcp implementation, where theTCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2282975    

Description ybuenos 2024-05-22 15:04:42 UTC
In the Linux kernel, the following vulnerability has been resolved:

mptcp: Fix out of bounds when parsing TCP options

The Linux kernel CVE team has assigned CVE-2021-47244 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47244-cc41@gregkh/T