tcp: Fix data-races around sysctl_tcp_recovery.
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix data-races around sysctl_tcp_recovery. While reading sysctl_tcp_recovery, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.
- Published
- Feb 26, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 7th percentile
- CWE
- CWE-362
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.4 and later · before 4.19.254
- linux linux kernel4.20 and later · before 5.4.208
- linux linux kernel5.5 and later · before 5.10.134
- linux linux kernel5.11 and later · before 5.15.58
- linux linux kernel5.16 and later · before 5.18.15
- linux linux kernel5.19
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 4.4affected
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before c7a492db1f7c37c758a66915908677bd8bc5d368affected · git
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before 92c35113c63306091df9211375eebd0abd8c2160affected · git
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before d8781f7cd04091744f474a2bada74772084b9dc9affected · git
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before a31e2d0cb5cfa2aae3144cac04f25031d5d20fb4affected · git
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before 52ee7f5c4811ce6be1becd14d38ba1f8a8a0df81affected · git
- 4f41b1c58a32537542f14c1150099131613a5e8a and later · before e7d2ef837e14a971a05f60ea08c47f3fed1a36e4affected · git
- before 4.4not affected · semver
- 4.19.254 and later · up to and including 4.19.*not affected · semver
- 5.4.208 and later · up to and including 5.4.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.18.16-1 | 5.18.16-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 52ee7f5c4811ce6be1becd14d38ba1f8a8a0df81 | Vendor (CNA) |
| Linux Linux | 92c35113c63306091df9211375eebd0abd8c2160 | Vendor (CNA) |
| Linux Linux | a31e2d0cb5cfa2aae3144cac04f25031d5d20fb4 | Vendor (CNA) |
| Linux Linux | c7a492db1f7c37c758a66915908677bd8bc5d368 | Vendor (CNA) |
| Linux Linux | d8781f7cd04091744f474a2bada74772084b9dc9 | Vendor (CNA) |
| Linux Linux | e7d2ef837e14a971a05f60ea08c47f3fed1a36e4 | Vendor (CNA) |
| debian:linux | 5.18.16-1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/52ee7f5c4811ce6be1becd14d38ba1f8a8a0df81
- git.kernel.org/stable/c/92c35113c63306091df9211375eebd0abd8c2160
- git.kernel.org/stable/c/a31e2d0cb5cfa2aae3144cac04f25031d5d20fb4
- git.kernel.org/stable/c/c7a492db1f7c37c758a66915908677bd8bc5d368
- git.kernel.org/stable/c/d8781f7cd04091744f474a2bada74772084b9dc9
- git.kernel.org/stable/c/e7d2ef837e14a971a05f60ea08c47f3fed1a36e4
Vendor advisories and official records. Exploit/PoC links are deliberately left out.