Low 1.9Published Aug 19, 2013

CVE-2013-4242GnuPG before 1.4.14, and Libgcrypt before 1.5.3 as used in GnuPG 2.0.x and possibly other products, allows local users to obtain private RSA keys via a cache side-channel attack involving the L3 cach…

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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It affects canonical ubuntu_linux and 4 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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GnuPG before 1.4.14, and Libgcrypt before 1.5.3 as used in GnuPG 2.0.x and possibly other products, allows local users to obtain private RSA keys via a cache side-channel attack involving the L3 cache, aka Flush+Reload.

CVSS: 1.9 LOW (v2.0, NVD)AV:L/AC:M/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

canonical ubuntu_linux canonical:ubuntu_linux	10.04; 12.04; 12.10; 13.04	NVD
debian debian_linux debian:debian_linux	6.0; 7.0	NVD
gnupg gnupg gnupg:gnupg	through 1.4.13; 0.0.0; 0.2.15; 0.2.16; 0.2.17; 0.2.18; 0.2.19; 0.3.0; and 72 more ranges	NVD
gnupg libgcrypt gnupg:libgcrypt	through 1.5.2; 1.4.0; 1.4.3; 1.4.4; 1.4.5; 1.4.6; 1.5.0; 1.5.1	NVD
opensuse opensuse opensuse:opensuse	12.2; 12.3	NVD

References

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717880
http://eprint.iacr.org/2013/448
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
http://lists.gnupg.org/pipermail/gnupg-announce/2013q3/000330.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00003.html	vendor-advisory
http://rhn.redhat.com/errata/RHSA-2013-1457.html
http://secunia.com/advisories/54318	vendor-advisory
http://secunia.com/advisories/54321	vendor-advisory
http://secunia.com/advisories/54332	vendor-advisory
http://secunia.com/advisories/54375	vendor-advisory
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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.